S-85S0PD10-I8T1U_技术文档

S-85S0P Series

SUPPLY VOLTAGE DIVIDED OUTPUT,

5.5 V INPUT, 50 mA SYNCHRONOUS STEP-DOWN

SWITCHING REGULATOR WITH 260 nA QUIESCENT CURRENT

www.ablic.com

Rev.1.2_00

The S-85S0P Series introduces own distinctive low power consumption control and COT (Constant On-Time) control,

features ultra low current consumption (260 nA quiescent current) and fast transient response, operates at PFM control.

The S-85S0P Series realizes high efficiency in a wide range of load current consumption and provides strong support for

extended period operation of mobile devices and wearable devices which are equipped with compact batteries.

The function of the supply voltage divided output is prepared in the S-85S0P Series. The supply voltage divided output is a

function that divides the input voltage (V_IN) of the DC-DC converter into V_IN/2 or V_IN/3 and outputs the voltage. For example,

this function makes it possible that the IC connects to a low voltage microcontroller A/D converter directly and the

microcontroller monitors a battery voltage.

 Features

 Applications

DC-DC converter block

• Ultra low current consumption:

• Efficiency (when under 100 μA load):

• Fast transient response:

• Input voltage:

• Wearable device

260 nA quiescent current

90.5%

COT control

• Bluetooth device

• Wireless sensor network device

• Healthcare equipment

• Smart meter

2.2 V to 5.5 V

• Output voltage:

0.7 V to 2.5 V, in 0.05 V step

2.6 V to 3.9 V, in 0.1 V step

1.5% (1.0 V ≤ V_OUT≤ 3.9 V)

15 mV (0.7 V ≤ V_OUT< 1.0 V)

420 mΩ

• Portable game device

• Output voltage accuracy:

 Package

• High side power MOS FET on-resistance:

• Low side power MOS FET on-resistance:

• Soft-start function:

• SNT-8A

(2.46 mm

320 mΩ

1 ms typ.

× 1.97 mm × t0.5 mm max.)

• Under voltage lockout function (UVLO):

• Thermal shutdown function:

1.8 V typ. (detection voltage)

135°C typ. (detection temperature)

300 mA (at L = 2.2 μH)

• Overcurrent protection function:

•

Automatic recovery type short-circuit protection function:Hiccup control

• Input and output capacitors:

Ceramic capacitor compatible

Supply voltage divider block

• Low current consumption:

• Input voltage:

280 nA typ.

1.5 V to 5.5 V

V_IN/2 (S-85S0PCxx)

V_IN/3 (S-85S0PDxx)

• Output voltage:

Overall

• Operation temperature range:

• Lead-free (Sn 100%), halogen-free

Ta = −40°C to +85°C

 Typical Application Circuit

 Efficiency

L

V_OUT(S)= 1.8 V

2.2 μH

VIN

V

OUT

100

80

60

40

20

0

VIN

SW

C

4.7 μF

OUT

C

IN

V

IN = 2.5 V

4.7 μF

PVSS

EN

VOUT

V

IN = 3.6 V

VIN = 4.2 V

PMEN

PMOUT

0.01

0.1

1

10

100

C

PM

VSS

0.22 μF

I

OUT [mA]

1

SUPPLY VOLTAGE DIVIDED OUTPUT, 5.5 V INPUT, 50 mA SYNCHRONOUS STEP-DOWN SWITCHING REGULATOR WITH 260 nA QUIESCENT CURRENT

S-85S0P Series

Rev.1.2_00

 Block Diagram

C^IN

VIN

VOUT

−

+

L

VOUT

SW

−

+

COUT

+

−

PVSS

EN

UVLO

VIN

PMEN

PMOUT

+

−

CPM

VSS

Figure 1

2

SUPPLY VOLTAGE DIVIDED OUTPUT, 5.5 V INPUT, 50 mA SYNCHRONOUS STEP-DOWN SWITCHING REGULATOR WITH 260 nA QUIESCENT CURRENT

Rev.1.2_00

S-85S0P Series

 Product Name Structure

Users can select supply voltage divider block output voltage and DC-DC converter block output voltage for the

S-85S0P Series. Refer to "1. Product name" regarding the contents of product name, "2. Package" regarding

the package, "3. Product name list" regarding details of the product name.

1. Product name

S-85S0P

x

xx

-

I8T1

U

Environmental code

U:

Lead-free (Sn 100%), halogen-free

Package name abbreviation and packing specification^*1

I8T1: SNT-8A, Tape

DC-DC converter block output voltage^{*2, *3}

07 to 39

(e.g., when the output voltage is 0.7 V, it is expressed as 07.)

Supply voltage divider block output voltage

C: V_IN/2

D: V_IN/3

*1. Refer to the tape drawing.

*2. Refer to "3. Product name list".

*3. In the range from 0.7 V to 2.5 V, the products which have 0.05 V step are also available.

Contact our sales office when the product is necessary.

2. Package

Table 1 Package Drawing Codes

Package Name

SNT-8A

Dimension

PH008-A-P-SD

Tape

Reel

Land

PH008-A-C-SD

PH008-A-R-SD

PH008-A-L-SD

3

SUPPLY VOLTAGE DIVIDED OUTPUT, 5.5 V INPUT, 50 mA SYNCHRONOUS STEP-DOWN SWITCHING REGULATOR WITH 260 nA QUIESCENT CURRENT

S-85S0P Series

Rev.1.2_00

3. Product name list

Table 2

Output Voltage (V_OUT

)

S-85S0PCxx

S-85S0PDxx

0.7 V 15 mV

0.8 V 15 mV

0.9 V 15 mV

1.0 V 1.5%

1.1 V 1.5%

1.2 V 1.5%

1.3 V 1.5%

1.4 V 1.5%

1.5 V 1.5%

1.6 V 1.5%

1.7 V 1.5%

1.8 V 1.5%

1.9 V 1.5%

2.0 V 1.5%

2.1 V 1.5%

2.2 V 1.5%

2.3 V 1.5%

2.4 V 1.5%

2.5 V 1.5%

2.6 V 1.5%

2.7 V 1.5%

2.8 V 1.5%

2.9 V 1.5%

3.0 V 1.5%

3.1 V 1.5%

3.2 V 1.5%

3.3 V 1.5%

3.4 V 1.5%

3.5 V 1.5%

3.6 V 1.5%

3.7 V 1.5%

3.8 V 1.5%

3.9 V 1.5%

S-85S0PC07-I8T1U

S-85S0PC08-I8T1U

S-85S0PC09-I8T1U

S-85S0PC10-I8T1U

S-85S0PC11-I8T1U

S-85S0PC12-I8T1U

S-85S0PC13-I8T1U

S-85S0PC14-I8T1U

S-85S0PC15-I8T1U

S-85S0PC16-I8T1U

S-85S0PC17-I8T1U

S-85S0PC18-I8T1U

S-85S0PC19-I8T1U

S-85S0PC20-I8T1U

S-85S0PC21-I8T1U

S-85S0PC22-I8T1U

S-85S0PC23-I8T1U

S-85S0PC24-I8T1U

S-85S0PC25-I8T1U

S-85S0PC26-I8T1U

S-85S0PC27-I8T1U

S-85S0PC28-I8T1U

S-85S0PC29-I8T1U

S-85S0PC30-I8T1U

S-85S0PC31-I8T1U

S-85S0PC32-I8T1U

S-85S0PC33-I8T1U

S-85S0PC34-I8T1U

S-85S0PC35-I8T1U

S-85S0PC36-I8T1U

S-85S0PC37-I8T1U

S-85S0PC38-I8T1U

S-85S0PC39-I8T1U

S-85S0PD07-I8T1U

S-85S0PD08-I8T1U

S-85S0PD09-I8T1U

S-85S0PD10-I8T1U

S-85S0PD11-I8T1U

S-85S0PD12-I8T1U

S-85S0PD13-I8T1U

S-85S0PD14-I8T1U

S-85S0PD15-I8T1U

S-85S0PD16-I8T1U

S-85S0PD17-I8T1U

S-85S0PD18-I8T1U

S-85S0PD19-I8T1U

S-85S0PD20-I8T1U

S-85S0PD21-I8T1U

S-85S0PD22-I8T1U

S-85S0PD23-I8T1U

S-85S0PD24-I8T1U

S-85S0PD25-I8T1U

S-85S0PD26-I8T1U

S-85S0PD27-I8T1U

S-85S0PD28-I8T1U

S-85S0PD29-I8T1U

S-85S0PD30-I8T1U

S-85S0PD31-I8T1U

S-85S0PD32-I8T1U

S-85S0PD33-I8T1U

S-85S0PD34-I8T1U

S-85S0PD35-I8T1U

S-85S0PD36-I8T1U

S-85S0PD37-I8T1U

S-85S0PD38-I8T1U

S-85S0PD39-I8T1U

Remark Please contact our sales office for products with specifications other than the above.

4

SUPPLY VOLTAGE DIVIDED OUTPUT, 5.5 V INPUT, 50 mA SYNCHRONOUS STEP-DOWN SWITCHING REGULATOR WITH 260 nA QUIESCENT CURRENT

Rev.1.2_00

S-85S0P Series

 Pin Configuration

1. SNT-8A

Table 3

Top view

Pin No.

Symbol

PMOUT

Description

1

2

3

4

5

6

Supply voltage divided output pin

Voltage output pin

GND pin

1

2

3

4

8

7

6

5

VOUT

VSS

SW

External inductor connection pin

Power GND pin

PVSS

VIN

Figure 2

Power supply pin

Enable pin

7

8

EN

"H"

"L"

: Enable (normal operation)

: Disable (standby)

Supply voltage divided output enable pin

PMEN

"H"

"L"

: Enable (normal operation)

: Disable (standby)

5

SUPPLY VOLTAGE DIVIDED OUTPUT, 5.5 V INPUT, 50 mA SYNCHRONOUS STEP-DOWN SWITCHING REGULATOR WITH 260 nA QUIESCENT CURRENT

S-85S0P Series

Rev.1.2_00

 Absolute Maximum Ratings

Table 4

(Unless otherwise specified: Ta = +25°C, V_SS= 0 V)

Item

Symbol

Absolute Maximum Rating

Unit

V

VIN pin voltage

V_IN

V_EN

Supply voltage divider block V_PMEN

DC-DC converter block V_OUT

V_SS− 0.3 to V_SS+ 6.0

V_SS− 0.3 to V_IN+ 0.3 ≤ V_SS+ 6.0

V_SS− 0.3 to V_SS+ 6.0

V_SS− 0.3 to V_IN+ 0.3 ≤ V_SS+ 6.0

V_SS− 0.3 to V_SS+ 0.3 ≤ V_SS+ 6.0

−40 to +85

EN pin voltage

DC-DC converter block

V

PMEN pin voltage

VOUT pin voltage

V

PMOUT pin voltage Supply voltage divider block V_PMOUT

V

SW pin voltage

V_SW

V_PVSS

T_opr

V

PVSS pin voltage

Operation temperature

Storage temperature

V

°C

T_stg

−40 to +125

Caution The absolute maximum ratings are rated values exceeding which the product could suffer physical

damage. These values must therefore not be exceeded under any conditions.

 Thermal Resistance Value

Table 5

Item

Symbol

Condition

Board A

Min.

Typ.

211

173

−

Max.

Unit

−

°C/W

Board B

Board C

Board D

Board E

Junction-to-ambient thermal resistance^*1θ_JA

SNT-8A

*1. Test environment: compliance with JEDEC STANDARD JESD51-2A

Remark Refer to " Power Dissipation" and "Test Board" for details.

6

SUPPLY VOLTAGE DIVIDED OUTPUT, 5.5 V INPUT, 50 mA SYNCHRONOUS STEP-DOWN SWITCHING REGULATOR WITH 260 nA QUIESCENT CURRENT

Rev.1.2_00

S-85S0P Series

 Electrical Characteristics

1. DC-DC converter block

Table 6

(V_IN= 3.6 V^*1, Ta = +25°C unless otherwise specified)

Item

Symbol

V_IN

Condition

Min.

Typ.

3.6

Max.

Unit

V

Operating input voltage

−

2.2

5.5

V_OUT(S)

× 0.985

V_OUT(S)

− 0.015

V_OUT(S)

× 1.015

V_OUT(S)

+ 0.015

1.0 V ≤ V_OUT≤ 3.9 V, no external parts

0.7 V ≤ V_OUT< 1.0 V, no external parts

V_EN= 0 V

V_OUT(S)

1

V

Output voltage^*2

V_OUT

Current consumption

during shutdown

I_SSS

−

100

nA

V_OUT= V_OUT(S)+ 0.1 V, V_EN= V_IN,

no external parts,

no switching operation

Current consumption

during switching off

I_SS1

−

260

500

nA

High level input voltage

Low level input voltage

High level input current

Low level input current

High side power

MOS FET on-resistance

Low side power

MOS FET on-resistance

High side power

MOS FET leakage current

Low side power

MOS FET leakage current

Current limit^*3

V_SH

V_SL

I_SH

V_IN= 2.2 V to 5.5 V, EN pin

V_IN= 2.2 V to 5.5 V, EN pin, V_EN= V_IN

V_IN= 2.2 V to 5.5 V, EN pin, V_EN= 0 V

1.1

−

−100

−

V

0.3

100

nA

I_SL

R_HFET

R_LFET

I_HSW

I_SW= 100 mA

−

420

320

1

−

mΩ

nA

I_SW= −100 mA

V_IN= 2.2 V to 5.5 V, V_EN= 0 V, V_SW= 0 V

100

I_LSW

V_IN= 2.2 V to 5.5V, V_EN= 0 V, V_SW= V_IN

−100

1

−

nA

I_LIM

L = 2.2 μH

−

300

mA

t

V

_ON(S)= 1 μs × V_OUT/V_IN,

_OUT= V_OUT(S)× 0.9

ON time^*4

t_ON

t_ON(S)/1.3 t_ON(S)t_ON(S)/0.7 ns

Minimum OFF time

t_OFF(MIN)

−

1.7

100

1.8

−

1.9

ns

V

UVLO detection voltage

UVLO release voltage

V_UVLO

When V_INfalls

When V_INrises

−

+

1.9

2.0

2.1

V

V_OUT(S)

× 0.7

1.5

UVP detection voltage

Soft-start wait time

Soft-start time

V_UVP

t_SSW

t_SS

−

V

Time until V_OUTstarts rising

Time until V_OUTreaches 90% after it

starts rising

ms

1.0

135

115

Thermal shutdown

detection temperature

Thermal shutdown

release temperature

T_SD

T_SR

Junction temperature

−

°C

*1. V_IN= V_OUT(S)+ 1.0 V (V_OUT(S)≥ 2.6 V)

*2. V_OUT: Actual output voltage

V_OUT(S): Set output voltage

*3. The current limit changes according to the L value for the inductor to be used, input voltage, and output voltage.

Refer to " Operation" for details.

*4. t_ON: Actual ON time

t_ON(S): Set ON time

7

SUPPLY VOLTAGE DIVIDED OUTPUT, 5.5 V INPUT, 50 mA SYNCHRONOUS STEP-DOWN SWITCHING REGULATOR WITH 260 nA QUIESCENT CURRENT

S-85S0P Series

Rev.1.2_00

2. Supply voltage divider block

Table 7

(V_IN= 3.6 V, Ta = +25°C unless otherwise specified)

Item

Symbol

V_IN

Condition

Min.

1.5

−

Typ.

3.6

V_IN/2

V_IN/3

−

2.2

Max.

5.5

−

10

Unit

V

Operating input voltage

−

S-85S0PCxx

S-85S0PDxx

V

Output voltage^*1

V_PMOUT(S)−10 μA ≤ I_PMOUT≤ 10 μA

−

V

Load current

I_PMOUT

V_POF

R_PS

−

−10

−30

−20

−

μA

mV

Ω

S-85S0PCxx

S-85S0PDxx

30

Output offset voltage

Output impedance

Set-up time

−10 μA ≤ I_PMOUT≤ 10 μA

C_PM= 0.22 μF, no load

20

1000

10

S-85S0PCxx

S-85S0PDxx

ms

t_PU

1.1

10

ms

Current consumption

during operation^*2

PMEN pin input voltage

"H"

I_SS1P

V_PSH

V_PSL

I_PSH

V_PMEN= V_IN, no load (V_EN= 0 V)

−

1.0

−

280

−

550

−

nA

V

_IN= 3.6 V,

Determined by V_PMOUToutput level

PMEN pin input voltage

"L"

Determined by V_PMOUToutput level

−

0.25

100

−

V

PMEN pin input current

"H"

V_PMEN= V_IN

−100

−

nA

kΩ

PMEN pin input current

"L"

I_PSL

V_PMEN= 0 V

−

Discharge shunt resistance

during power-off

R_PLOW

V_PMEN= 0 V, V_PMOUT= 0.1 V

2.8

*1. V_PMOUT(S): Set output voltage

V_PMOUT(S)+ V_POF: Actual output voltage

*2. Current consumption when only the supply voltage divider block is in operation.

8

SUPPLY VOLTAGE DIVIDED OUTPUT, 5.5 V INPUT, 50 mA SYNCHRONOUS STEP-DOWN SWITCHING REGULATOR WITH 260 nA QUIESCENT CURRENT

Rev.1.2_00

S-85S0P Series

 Operation

1. DC-DC converter block

1. 1 Fast transient response

Distinctive COT (Constant On-Time) control is used for DC-DC converter control.

The S-85S0P Series monitors the output voltage (V_OUT) using a comparator and if V_OUTfalls below the targeted

value, the high side power MOS FET will turn on for a certain amount of time. Since the high side power MOS FET

turns on and V_OUTrises immediately after the load current fluctuates rapidly and V_OUTfalls, the fast transient

response is realized.

The S-85S0P Series outputs ON time in proportion to V_OUTand in inverse proportion to power supply voltage.

1. 2 PFM control (pulse frequency modulation method)

The S-85S0P Series operates at PFM control and skip the pulse according to the load current. This reduces

switching loss and improves efficiency.

The S-85S0P Series has a built-in reverse current detection circuit. The reverse current detection circuit monitors

the current flowing through the inductor. If the bottom of ripple current in the inductor falls to 0 mA, the high side

power MOS FET and low side power MOS FET will turn off and switching operation will stop. Switching frequency

(f_SW) will fall by skipping a pulse. This means that the smaller I_OUTis, the more the switching frequency will drop,

and it reduces switching loss.

If the power supply voltage decreases and then the potential difference between input and output becomes smaller,

the S-85S0P Series will stop skipping the pulse.

1. 3 Ultra low current consumption

When in discontinuous mode, the S-85S0P Series reduces current consumption to 260 nA typ. by intermittently

operating a control circuit and a protection circuit. If switching operation stops and a certain amount of time elapses

after the high side power MOS FET and low side power MOS FET turn off, only the necessary circuits will operate.

Under voltage lockout function (UVLO), thermal shutdown function, current limit function, and automatic recovery

type short-circuit protection function are prepared in the S-85S0P Series, and each protection function will carry out

detection operation for a certain amount of time from when the high side power MOS FET turns on. It is thus able

to realize ultra low current consumption.

1. 4 EN pin

This pin starts and stops switching operation. When the EN pin is set to "L", the operation of all internal circuits,

including the high side power MOS FET, is stopped, reducing current consumption. Current consumption

increases when a voltage of 0.3 V to V_IN− 0.3 V is applied to the EN pin. When not using the EN pin, connect it to

the VIN pin. Since the EN pin is neither pulled down nor pulled up internally, do not use it in the floating status.

The structure of the EN pin is shown in Figure 3.

Table 8

EN Pin

Internal Circuit

Enable (normal operation)

Disable (standby)

VOUT Pin Voltage

*1

"H"

"L"

V_OUT

"High-Z"

*1. Refer to *2 in Table 6 in " Electrical Characteristics".

VIN

EN

VSS

Figure 3

9

SUPPLY VOLTAGE DIVIDED OUTPUT, 5.5 V INPUT, 50 mA SYNCHRONOUS STEP-DOWN SWITCHING REGULATOR WITH 260 nA QUIESCENT CURRENT

S-85S0P Series

Rev.1.2_00

1. 5 Under voltage lockout function (UVLO)

The S-85S0P Series has a built-in UVLO circuit to prevent the IC from malfunctioning due to a transient status at

power-on or a momentary drop in the supply voltage. When UVLO status is detected, the high side power MOS

FET and low side power MOS FET will turn off, and the SW pin will change to "High-Z". For this reason, switching

operation will stop. The soft-start function is reset if UVLO status is detected once, and is restarted by releasing

the UVLO status.

Note that the other internal circuits operate normally and the status is different from the disabled status.

Also, there is a hysteresis width for avoiding malfunctions due to generation of noise etc. in the input voltage.

1. 6 Thermal shutdown function

The S-85S0P Series has a built-in thermal shutdown circuit to limit overheating. When the junction temperature

increases to 135°C typ., the thermal shutdown circuit becomes the detection status, and the switching operation is

stopped. When the junction temperature decreases to 115°C typ., the thermal shutdown circuit becomes the

release status, and the switching operation is restarted.

If the thermal shutdown circuit becomes the detection status due to self-heating, the switching operation is stopped

and output voltage (V_OUT) decreases. For this reason, the self-heating is limited and the temperature of the IC

decreases. The thermal shutdown circuit becomes release status when the temperature of the IC decreases, and

the switching operation is restarted, thus the self-heating is generated again. Repeating this procedure makes the

waveform of V_OUTinto a pulse-like form. Switching operation stopping and starting can be stopped by either setting

the EN pin to "L", lowering the output current (I_OUT) to reduce internal power consumption, or decreasing the

ambient temperature.

Table 9

Thermal Shutdown Circuit

Release: 115°C typ.^*1

VOUT Pin Voltage

V_OUT

"High-Z"

Detection: 135°C typ.^*1

*1. Junction temperature

1. 7 Overcurrent protection function

The S-85S0P Series has a built-in current limit circuit.

The overcurrent protection circuit monitors the current that flows through the low side power MOS FET and limits

current to prevent thermal destruction of the IC due to an overload, magnetic saturation in the inductor, etc.

When a current exceeding the current limit (I_LIM) flows through the low side power MOS FET, the current limit

circuit operates and prohibits turning on the high side power MOS FET until the current falls below the low side

current limit (I_LIMDET). If the value of the current that flows through the low side power MOS FET falls to the I_LIMDET

or lower, the S-85S0P Series returns to normal operation. I_LIMDETis fixed at 120 mA typ. in the IC, and I_LIMwill vary

depending on the external parts to be used.

The relation between I_LIM, the inductor value (L), the input voltage (V_IN), and the output voltage (V_OUT) are shown in

the following expression.

1

(V_IN

−

V_OUT) × V_OUT

V_IN

I

_LIM= I_LIMDET

+

×

2 × L × f_SW

10

SUPPLY VOLTAGE DIVIDED OUTPUT, 5.5 V INPUT, 50 mA SYNCHRONOUS STEP-DOWN SWITCHING REGULATOR WITH 260 nA QUIESCENT CURRENT

Rev.1.2_00

S-85S0P Series

1. 8 Automatic recovery type short-circuit protection function (Hiccup control)

The S-85S0P Series has a built-in automatic recovery type short-circuit protection function for Hiccup control.

Hiccup control is a method for periodically carrying out automatic recovery when the IC detects overcurrent and

stops the switching operation.

1. 8. 1 When over load status is released

<1> Overcurrent detection

<2> Under voltage protection circuit (UVP circuit) detects a drop in the output voltage (V_OUT).

<3> 220 μs elapse

<4> Switching operation stop (for 9 ms typ.)

<5> Overload status release

<6> The IC restarts, soft-start function starts.

In this case, it is unnecessary to input an external reset signal for restart.

<7> V_OUTreaches V_OUT(S)after 1.0 ms typ. elapses.

<1>

<5>

Overload status

Normal load status

I^*1

L

I

LIMDET = 120 mA typ.

OUT = 50 mA max.

I

0 A

V

SW

0 V

VOUT(S)

VOUT

V

UVP typ.

0 V

<3>

<7>

1.0 ms typ.

220 s

9.0 ms typ.

<2>

<4>

<6>

*1. Inductor current

Figure 4

1. 8. 2 When over load status continues

<1> Overcurrent detection

<2> The UVP circuit detects a drop in V_OUT

.

<3> 220

<4> Switching operation stop (for 9 ms typ.)

<5> The IC restarts, soft-start function starts.

μs elapse

<6> The status returns to <2> when over load status continues after 1.25 ms typ. elapses.

<1>

Overload status

I

LIMDET = 120 mA typ.

OUT = 50 mA max.

I^*1

L

I

0 A

VSW

0 V

VOUT(S)

VOUT

V

UVP typ.

0 V

<3>

<6>

<3>

220 s

9.0 ms typ.

1.25 ms typ.

220 s

9.0 ms typ.

<2>

<4>

<5>

<2>

<4>

*1. Inductor current

Figure 5

11

SUPPLY VOLTAGE DIVIDED OUTPUT, 5.5 V INPUT, 50 mA SYNCHRONOUS STEP-DOWN SWITCHING REGULATOR WITH 260 nA QUIESCENT CURRENT

S-85S0P Series

Rev.1.2_00

1. 9 Pre-bias compatible soft-start function

The S-85S0P Series has a built-in pre-bias compatible soft-start circuit.

If the pre-bias compatible soft-start circuit starts when electrical charge remains in the output voltage (V_OUT) as a

result of power supply restart, etc., or when V_OUTis biased beforehand (pre-bias status), switching operation is

stopped until the soft-start voltage exceeds the internal feedback voltage, and then V_OUTis maintained. If the

soft-start voltage exceeds the internal feedback voltage, switching operation will restart and V_OUTwill rise to the

output voltage setting value (V_OUT(S)). This allows V_OUT(S)to be reached without lowering the pre-biased V_OUT

.

In soft-start circuits which are not pre-bias compatible, a large current flows as a result of the discharge of the

residual electric charge through the low side power MOS FET when switching operation starts, which could cause

damage, however in a pre-bias compatible soft-start circuit, the IC is protected from the large current when

switching operation starts, and it makes power supply design for the application circuit simpler.

In the S-85S0P Series, V_OUTreaches V_OUT(S)gradually due to the soft-start circuit.

In the following cases, rush current and V_OUTovershoot are reduced.

• At power-on

• When the EN pin changes from "L" to "H".

• When UVLO operation is released.

• When thermal shutdown is released.

• At short-circuit recovery

In addition, the soft-start circuit operates under the following conditions.

The soft-start circuit starts operating after "H" is input to the EN pin and the soft-start wait time (t_SSW) = 1.5 ms typ.

elapses. The soft-start time (t_SS) is set to 1.0 ms typ.

• At power supply restart (the IC restart)

• At UVLO detection (after UVLO release)

• At thermal shutdown detection (after thermal shutdown release)

• After Hiccup control

Soft-start wait time Soft-start time

Soft-start operation during pre-bias

(tSSW

)

(tSS)

V

EN

VOUT

V

SW

Figure 6

12

SUPPLY VOLTAGE DIVIDED OUTPUT, 5.5 V INPUT, 50 mA SYNCHRONOUS STEP-DOWN SWITCHING REGULATOR WITH 260 nA QUIESCENT CURRENT

Rev.1.2_00

S-85S0P Series

2. Supply voltage divider block

The supply voltage divided output is a function that divides the input voltage (V_IN) of the DC-DC converter into V_IN/2

or V_IN/3 and outputs the voltage. For example, the microcontroller can monitor battery voltage by inputting the output

voltage (V_PMOUT) to the A/D converter in the microcontroller. Connecting the IC and the microcontroller makes it

possible that it is used as a remained battery capacity monitor for lithium-ion rechargeable batteries, coin batteries,

and other batteries.

V

_INis divided into V_IN/2 in S-85S0PCxx, and V_IN/3 in S-85S0PDxx.

Low output impedance is realized since the buffer amp in the supply voltage divider block constitutes a voltage

follower.

Each the supply voltage divider block and DC-DC converter block operate independently. When the PMEN pin is "L"

and the supply voltage divider block is in standby status, the electrical charge in the output capacitor connected to the

PMOUT pin is discharged by an impedance of approximately 2.8 kΩ.

2. 1 Basic operation

Figure 7 shows the block diagram of the supply voltage divider block to describe basic operation.

Reference voltage (V_refpm) is generated by dividing the input voltage (V_IN) to V_IN/2 or V_IN/3 using the dividing

resistance (R_pm1and R_pm2). Since the buffer amplifier constitutes a voltage follower, it can perform the feedback

control so that V_PMOUTand V_refpmare the same. Low output impedance is realized by the buffer amplifier, while

outputting V_PMOUTaccording to V_IN.

When "L" is input to the PMEN pin the current which flows to R_pm1and R_pm2and the current which flows to the

buffer amplifier can be stopped. The buffer amplifier output is pulled down to V_SSby the built-in N-channel

transistor, and V_PMOUTis set to the V_SSlevel.

The difference, the output offset voltage (V_POF), is generated between V_PMOUTand V_PMOUT(S), and it is expressed

with V_PMOUT= V_PMOUT(S)+ V_POF

.

In addition, V_PMOUTwill change slightly according to the load current, and the value of change is expressed as the

output impedance (R_PS).

VIN

SW

Buffer amplifier

R_pm1

V_refpm

+

−

PMOUT

R_pm2

Supply voltage

divided output

enable circuit

PMEN

VSS

Figure 7

13

SUPPLY VOLTAGE DIVIDED OUTPUT, 5.5 V INPUT, 50 mA SYNCHRONOUS STEP-DOWN SWITCHING REGULATOR WITH 260 nA QUIESCENT CURRENT

S-85S0P Series

Rev.1.2_00

2. 2 PMEN pin

The PMEN pin controls the supply voltage divided output enable circuit.

When "H" is input to the PMEN pin, the supply voltage divided output enable circuit operates. This enables the

supply voltage divided output and allows for monitoring of the power supply voltage. When "L" is input to the

PMEN pin, the supply voltage divided output enable circuit stops. This disables the supply voltage divided output,

reducing the IC current consumption. In addition, the PMEN pin has absolutely no effect on the operation of the

DC-DC converter block.

Table 10

PMEN Pin

Supply Voltage Divided Output

Enable (normal operation)

Disable (standby)

Output Voltage (V_PMOUT

)

*1

"H"

"L"

V_PMOUT

V_SSlevel

*1. Refer to *1 in Table 7 in " Electrical Characteristics".

Figure 8 shows the internal equivalent circuit structure in relation to the PMEN pin. The PMEN pin is neither pulled

up nor pulled down, so do not use it in the floating status. When not using the PMEN pin, connect it to the VIN pin.

Note that the current consumption increases when a voltage of 0.25 V to V_IN− 0.3 V is applied to the PMEN pin.

VIN

PMEN

VSS

Figure 8

14

SUPPLY VOLTAGE DIVIDED OUTPUT, 5.5 V INPUT, 50 mA SYNCHRONOUS STEP-DOWN SWITCHING REGULATOR WITH 260 nA QUIESCENT CURRENT

Rev.1.2_00

S-85S0P Series

2. 3 PMEN pin voltage and output voltage (V_PMOUT

)

Figure 9 shows the relation between the PMEN pin voltage and the supply voltage divided output.

When "H" is input to the PMEN pin, the supply voltage divided output is enabled. Once set-up time (t_PU) = 10 ms

max.^*1elapses, the output voltage (V_PMOUT) will settle and the power supply voltage can be monitored.

When "L" is input to the PMEN pin, the supply voltage divided output is disabled. V_PMOUTis set to the V_SSlevel by

the built-in N-channel transistor.

By inputting "H" and "L" alternately to the PMEN pin, allowing for minimization of current consumption during the

period when the power supply voltage is not monitored.

*1. Ta = +25°C, V_IN= 3.6 V, C_PM= 0.22 μF, no load

Active "H"

V_PMEN

t_PU

V_PMOUT(S)+ V_POF

V_PMOUT

Figure 9

Remark V_PMEN= V_IN↔ V_SS

15

SUPPLY VOLTAGE DIVIDED OUTPUT, 5.5 V INPUT, 50 mA SYNCHRONOUS STEP-DOWN SWITCHING REGULATOR WITH 260 nA QUIESCENT CURRENT

S-85S0P Series

Rev.1.2_00

 Typical Application

Figure 10 shows the circuit diagram of the typical application in the S-85S0P Series, and Figure 11 shows the timing

chart.

As shown in Figure 10, connect the PMOUT pin to an analog input pin (AIN pin) of the A/D converter in the

microcontroller. The microcontroller can monitor the battery voltage by inputting the output voltage (V_PMOUT) to the A/D

converter.

The input voltage from the battery is converted to output voltage by the switching operation, and the microcontroller

starts driving with the voltage. The supply voltage divided output can be controlled by inputting "H" and "L" signals

output from the microcontroller I/O pin to the PMEN pin. Control the supply voltage divided output according to the A/D

converter operation timing.

When inputting "H" to the PMEN pin, the microcontroller monitors the battery voltage. The IC current consumption can

be minimized by inputting "L" to the PMEN pin when battery voltage is not monitored.

S-85S0P Series

Microcontroller

L

VDD

SW

VIN

C_OUT

VOUT

PMOUT

VSS

A/D

converter

EN

PMEN

PVSS

AIN

C_IN

Battery

VSS

I/O

C_PM

Figure 10

Active "H"

V_PMEN

t_PU

V_PMOUT(S)+ V_POF

V_PMOUT

Voltage monitoring timing

Figure 11

16

SUPPLY VOLTAGE DIVIDED OUTPUT, 5.5 V INPUT, 50 mA SYNCHRONOUS STEP-DOWN SWITCHING REGULATOR WITH 260 nA QUIESCENT CURRENT

Rev.1.2_00

S-85S0P Series

 Typical Circuit

VIN

VOUT

V

IN

C

IN

4.7 μF

−

+

L

VOUT

SW

2.2 μH

−

+

SS

COUT

4.7 μF

+

−

PVSS

EN

UVLO

VIN

PMEN

+

−

C

PM

0.22 μF

VSS

Figure 12

Caution The above connection diagram and constants will not guarantee successful operation.

Perform thorough evaluation using an actual application to set the constants.

17

SUPPLY VOLTAGE DIVIDED OUTPUT, 5.5 V INPUT, 50 mA SYNCHRONOUS STEP-DOWN SWITCHING REGULATOR WITH 260 nA QUIESCENT CURRENT

S-85S0P Series

Rev.1.2_00

 External Parts Selection

Selectable values and recommended values for external parts are shown in Table 11.

Use ceramic capacitors for C_INand C_OUT

.

Table 11

Input Capacitor Output Capacitor

Supply Voltage Divider Block

Item

Inductor (L)

(C_IN)

2.2 μF or larger

4.7 μF

(C_OUT

)

Output Capacitor (C_PM)

Selectable value

Recommended value

4.7 μF to 100 μF 1.5 μH to 10 μH

0.10 μF to 0.22 μF

4.7 μF 2.2 μH

−

1. DC-DC converter block input capacitor (C_IN)

C_INcan lower the power supply impedance, average the input current, improve the efficiency and noise tolerance.

Select a capacitor according to the impedance of the power supply to be used. Also take into consideration the DC

bias characteristics of the capacitor to be used.

2. DC-DC converter block output capacitor (C_OUT

)

C_OUTis used to smooth output voltage. If the capacitance is large, the overshoot and undershoot during load

transient and output ripple voltage can be improved even more. Select a proper capacitor after the sufficient

evaluation under actual conditions.

Table 12 Recommended Capacitors (C_IN, C_OUT) List (at V_OUT(S)≤ 2.5 V)

Withstanding

Manufacturer

Part Number

Capacitance

Dimensions (L × W × H)

Voltage

Murata Manufacturing Co., Ltd. GRM035R60J475ME15

Murata Manufacturing Co., Ltd. GRJ155R61A106ME12

4.7 μF

10 μF

6.3 V

10 V

0.6 mm × 0.3 mm × 0.5 mm

1.0 mm × 0.5 mm × 0.5 mm

Table 13 Recommended Capacitors (C_IN, C_OUT) List (at V_OUT(S)> 2.5 V)

Withstanding

Manufacturer

Part Number

Capacitance

Dimensions (L × W × H)

Voltage

Murata Manufacturing Co., Ltd. GRJ155R61A106ME12

10 μF

10 V

1.0 mm × 0.5 mm × 0.5 mm

3. DC-DC converter block inductor (L)

When selecting L, note the allowable current. If a current exceeding this allowable current flows through the inductor,

magnetic saturation may occur, and there may be risks which substantially lower efficiency and damage the IC as a

result of large current.

Therefore, select an inductor so that peak current value (I_PK), even during overcurrent detection, does not exceed

the allowable current.

When prioritizing the load response, select an inductor with a small L value such as 2.2 μH. When prioritizing the

efficiency, select an inductor with a large L value such as 4.7 μH. I_PKis calculated using the following expression.

1

(V_IN

−

V_OUT) × V_OUT

V_IN

I

_PK= I_OUT

+

×

2 × L × f_SW

Table 14 Recommended Inductors (L) List (at V_IN≤ 4.2 V)

Rated

Current

520 mA

Manufacturer

Part Number

Inductance

Dimensions (L × W × H)

TAIYO YUDEN CO.,LTD.

Murata Manufacturing Co., Ltd.

MBKK1608T2R2M

DFE201210S-2R2M=P2

2.2 μH

1.6 mm × 0.8 mm × 1.0 mm

2000 mA 2.0 mm × 1.2 mm × 1.0 mm

850 mA

800 mA

Würth Elektronik GmbH & Co. KG 74438313022

TDK Corporation

MLP2012S2R2MT0S1

1.6 mm × 1.6 mm × 1.0 mm

2.0 mm × 1.25 mm × 0.85 mm

Table 15 Recommended Inductors (L) List (at V_IN> 4.2 V)

Rated

Current

Manufacturer

Part Number

Inductance

Dimensions (L × W × H)

Murata Manufacturing Co., Ltd.

DFE201210S-2R2M=P2

2.2 μH

2000 mA 2.0 mm × 1.2 mm × 1.0 mm

Würth Elektronik GmbH & Co. KG 74438313022

TDK Corporation MLP2012S2R2MT0S1

850 mA

800 mA

1.6 mm × 1.6 mm × 1.0 mm

2.0 mm × 1.25 mm × 0.85 mm

18

SUPPLY VOLTAGE DIVIDED OUTPUT, 5.5 V INPUT, 50 mA SYNCHRONOUS STEP-DOWN SWITCHING REGULATOR WITH 260 nA QUIESCENT CURRENT

Rev.1.2_00

S-85S0P Series

4. Supply voltage divider block output capacitor (C_PM

)

When selecting C_PM, take into consideration the operation stability. If the capacitance is large, the rising time until

V

_PMOUTreaches the intended voltage (set-up time (t_PU)) will be longer.

Table 16 Recommended Capacitors (C_PM) List

Withstanding

Voltage

Manufacturer

Part Number

Capacitance

Dimensions (L × W × H)

TDK Corporation

CGA2B2X5R1A104M050BA

C0603X5R0J224M030BB

0.10 μF

0.22 μF

0.10 μF

0.22 μF

6.3 V

1.0 mm × 0.5 mm × 0.5 mm

0.6 mm × 0.3 mm × 0.3 mm

Murata Manufacturing Co., Ltd. GRM033R60J104ME19

Murata Manufacturing Co., Ltd. GRM033R60J224ME90

19

SUPPLY VOLTAGE DIVIDED OUTPUT, 5.5 V INPUT, 50 mA SYNCHRONOUS STEP-DOWN SWITCHING REGULATOR WITH 260 nA QUIESCENT CURRENT

S-85S0P Series

Rev.1.2_00

 Board Layout Guidelines

Note the following cautions when determining the board layout for the S-85S0P Series.

• Place C_INas close to the VIN pin and the PVSS pin as possible.

• Make the VIN pattern and GND pattern as wide as possible.

• Place thermal vias in the GND pattern to ensure sufficient heat dissipation.

• Keep thermal vias near C_INand C_OUTapproximately 3 mm to 4 mm away from capacitor pins.

• Large current flows through the SW pin. Make the wiring area of the pattern to be connected to the SW pin small to

minimize parasitic capacitance and emission noise.

• Do not wire the SW pin pattern under the IC.

Total size: 5.0 mm × 2.2 mm = 11.0 mm²

Figure 13 Reference Board Pattern

Caution The above pattern diagram does not guarantee successful operation. Perform thorough evaluation

using the actual application to determine the pattern.

Remark Refer to the land drawing of SNT-8A and "SNT Package User's Guide".

20

SUPPLY VOLTAGE DIVIDED OUTPUT, 5.5 V INPUT, 50 mA SYNCHRONOUS STEP-DOWN SWITCHING REGULATOR WITH 260 nA QUIESCENT CURRENT

Rev.1.2_00

S-85S0P Series

 Precautions

•

Mount external capacitors and inductors as close as possible to the IC, and make single GND.

Characteristic ripple voltage and spike noise occur in the IC containing switching regulators. Moreover rush current

flows at the time of a power supply injection. Because these largely depend on the inductor, the capacitor and

impedance of power supply to be used, fully check them using an actually mounted model.

•

The 4.7 μF capacitor connected between the VIN pin and the VSS pin is a bypass capacitor. It stabilizes the power

supply in the IC when application is used with a heavy load, and thus effectively works for stable switching

regulator operation. Allocate the bypass capacitor as close to the IC as possible, prioritized over other parts.

•

Although the IC contains a static electricity protection circuit, static electricity or voltage that exceeds the limit of

the protection circuit should not be applied.

The power dissipation of the IC greatly varies depending on the size and material of the board to be connected.

Perform sufficient evaluation using an actual application before designing.

ABLIC Inc. assumes no responsibility for the way in which this IC is used on products created using this IC or for

the specifications of that product, nor does ABLIC Inc. assume any responsibility for any infringement of patents or

copyrights by products that include this IC either in Japan or in other countries.

21

SUPPLY VOLTAGE DIVIDED OUTPUT, 5.5 V INPUT, 50 mA SYNCHRONOUS STEP-DOWN SWITCHING REGULATOR WITH 260 nA QUIESCENT CURRENT

S-85S0P Series

Rev.1.2_00

 Characteristics (Typical Data)

1. Example of major power supply dependence characteristics (Ta = +25°C)

DC-DC converter block

1. 1 Current consumption during switching off (I_SS1

vs. Input voltage (V_IN)

)

1. 2 Current consumption during shutdown (I_SSS)

vs. Input voltage (V_IN)

500

400

300

200

100

80

60

40

20

0

2.0 2.5 3.0 3.5 4.0 4.5 5.0 5.5

VIN [V]

1. 3 Output voltage (V_OUT) vs. Input voltage (V_IN)

1. 4 Output voltage (V_OUT) vs. Input voltage (V_IN)

V_OUT(S)= 1.2 V

V_OUT(S)= 1.8 V

1.230

1.840

1.220

1.210

1.200

1.190

1.180

1.820

1.800

1.780

1.760

1.170

2.0 2.5 3.0 3.5 4.0 4.5 5.0 5.5

V

IN [V]

VIN [V]

1. 5 Output voltage (V_OUT) vs. Input voltage (V_IN)

V_OUT(S)= 2.5 V

2.600

2.400

2.200

2.000

1.800

2.0 2.5 3.0 3.5 4.0 4.5 5.0 5.5

V

IN [V]

1. 6 ON time (t_ON) vs. Input voltage (V_IN)

V_OUT(S)= 1.8 V

1. 7 Switching frequency (f_SW) vs. Input voltage (V_IN)

V_OUT(S)= 1.8 V

1.0

0.8

0.6

0.4

0.2

0.0

1.4

1.2

1.0

0.8

0.6

2.0 2.5 3.0 3.5 4.0 4.5 5.0 5.5

VIN [V]

22

SUPPLY VOLTAGE DIVIDED OUTPUT, 5.5 V INPUT, 50 mA SYNCHRONOUS STEP-DOWN SWITCHING REGULATOR WITH 260 nA QUIESCENT CURRENT

Rev.1.2_00

S-85S0P Series

1. 8 Soft-start wait time (t_SSW) vs. Input voltage (V_IN) 1. 9 Soft-start time (t_SS) vs. Input voltage (V_IN)

2.50

2.00

1.50

1.00

0.50

0.00

2.50

2.00

1.50

1.00

0.50

0.00

2.0 2.5 3.0 3.5 4.0 4.5 5.0 5.5

VIN [V]

1. 10 High side power MOS FET on-resistance (R_HFET

vs. Input voltage (V_IN)

)

1. 11 Low side power MOS FET on-resistance (R_LFET

vs. Input voltage (V_IN)

)

800

700

600

500

400

300

200

100

0

2.0 2.5 3.0 3.5 4.0 4.5 5.0 5.5

VIN [V]

1. 12 High side power MOS FET leakage current (I_HSW

vs. Input voltage (V_IN)

)

1. 13 Low side power MOS FET leakage current (I_LSW

vs. Input voltage (V_IN)

)

100

80

60

40

20

100

80

60

40

20

0

2.0 2.5 3.0 3.5 4.0 4.5 5.0 5.5

VIN [V]

1. 14 High level input voltage (V_SH) vs. Input voltage (V_IN)

1. 15 Low level input voltage (V_SL) vs. Input voltage (V_IN)

1.2

1.0

0.8

0.6

0.4

0.2

1.2

1.0

0.8

0.6

0.4

0.2

0.0

2.0 2.5 3.0 3.5 4.0 4.5 5.0 5.5

V

IN [V]

VIN [V]

23

SUPPLY VOLTAGE DIVIDED OUTPUT, 5.5 V INPUT, 50 mA SYNCHRONOUS STEP-DOWN SWITCHING REGULATOR WITH 260 nA QUIESCENT CURRENT

S-85S0P Series

Rev.1.2_00

Supply voltage divider block

1. 16 Output voltage (V_PMOUT) vs. Input voltage (V_IN) 1. 17 Output voltage (V_PMOUT) vs. Input voltage (V_IN)

_PMOUT(S)= V_IN/2 _PMOUT(S)= V_IN/3

V

3.0

2.5

2.0

1.5

1.0

0.5

0.0

3.0

2.5

2.0

1.5

1.0

0.5

0.0

1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0 5.5

V

IN [V]

VIN [V]

1. 18 Current consumption during operation (I_SS1P

vs. Input voltage (V_IN)

)

1. 19 Output offset voltage (V_POF) vs. Input voltage (V_IN)

1000

800

600

400

200

40

20

0

−

20

40

0

−

1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0 5.5

V

IN [V]

VIN [V]

1. 20 Set-up time (t_PU) vs. Input voltage (V_IN)

_PMOUT(S)= V_IN/2, C_PM= 0.22 μF

1. 21 Set-up time (t_PU) vs. Input voltage (V_IN)

_PMOUT(S)= V_IN/3, C_PM= 0.22 μF

V

10

8

6

4

2

0

1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0 5.5

V

IN [V]

VIN [V]

1. 22 PMEN pin input voltage "H" (V_PSH

vs. Input voltage (V_IN)

)

1. 23 PMEN pin input voltage "L" (V_PSL

vs. Input voltage (V_IN)

)

1.2

1.0

0.8

0.6

0.4

0.2

0.0

1.2

1.0

0.8

0.6

0.4

0.2

0.0

1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0 5.5

V

IN [V]

VIN [V]

24

SUPPLY VOLTAGE DIVIDED OUTPUT, 5.5 V INPUT, 50 mA SYNCHRONOUS STEP-DOWN SWITCHING REGULATOR WITH 260 nA QUIESCENT CURRENT

Rev.1.2_00

S-85S0P Series

2. Example of major temperature characteristics (Ta = −40°C to +85°C)

DC-DC converter block

2. 1 Current consumption during switching off (I_SS1

vs. Temperature (Ta)

)

2. 2 Current consumption during shutdown (I_SSS

vs. Temperature (Ta)

)

500

200

150

V

DD = 2.2 V

400

300

200

100

0

V

DD = 5.5 V

V

DD = 2.2 V

100

50

0

V

DD = 3.6 V

V

DD = 3.6 V

V

DD = 5.5 V

−

40

−25

0

25

50

75 85

−40

−25

0

25

50

75 85

Ta [C]

2. 4 Output voltage (V_OUT) vs. Temperature (Ta)

_OUT(S)= 1.8 V

2. 3 Output voltage (V_OUT) vs. Temperature (Ta)

V

_OUT(S)= 1.2 V

V

1.230

1.220

1.210

1.200

1.190

1.180

1.170

1.840

1.820

1.800

1.780

1.760

V

DD = 2.2 V

V

DD = 2.2 V

V

DD = 5.5 V

V

DD = 3.6 V

V

DD = 3.6 V

50

V

DD = 5.5 V

25

−

40

−25

0

25

Ta [C]

75 85

−40

−25

0

50

75 85

Ta [C]

2. 5 Output voltage (V_OUT) vs. Temperature (Ta)

V_OUT(S)= 2.5 V

2.560

2.540

V

DD = 5.5 V

2.520

2.500

2.480

2.460

2.440

V

DD = 3.6 V

50



40

25

0

25

Ta [C]

75 85

2. 6 ON time (t_ON) vs. Temperature (Ta)

2. 7 Switching frequency (f_SW) vs. Temperature (Ta)

1.2

1.0

1.4

1.2

1.0

0.8

0.6

V

DD = 3.6 V

0.8

0.6

0.4

0.2

0.0

V

DD = 3.6 V

V

DD = 2.2 V

V

DD = 2.2 V

50 75 85

V

DD = 5.5 V

0

V

DD = 5.5 V

25

Ta [C]

−

40

−25

0

50

75 85

−40

−

25

Ta [C]

25

SUPPLY VOLTAGE DIVIDED OUTPUT, 5.5 V INPUT, 50 mA SYNCHRONOUS STEP-DOWN SWITCHING REGULATOR WITH 260 nA QUIESCENT CURRENT

S-85S0P Series

Rev.1.2_00

2. 8 Soft-start wait time (t_SSW) vs. Temperature (Ta)

2. 9 Soft-start time (t_SS) vs. Temperature (Ta)

2.50

2.00

1.50

2.50

2.00

1.50

1.00

0.50

0.00

V

DD = 2.2 V

V

DD = 5.5 V

1.00

0.50

0.00

V

DD = 3.6 V

V

DD = 2.2 V

V

DD = 5.5 V

25

VDD = 3.6 V

40

25

0

25

50

75 85

40



0

25

Ta [C]

50

75 85

Ta [C]

2. 10 High side power MOS FET on-resistance (R_HFET

vs. Temperature (Ta)

)

2. 11 Low side power MOS FET on-resistance (R_LFET

vs. Temperature (Ta)

)

800

700

V

DD = 2.2 V

700

600

500

400

300

200

100

0

600

500

400

300

200

100

0

V

DD = 2.2 V

V

DD = 3.6 V

50

V

DD = 3.6 V

50 75 85

VDD = 5.5 V

V

DD = 5.5 V

40 25

0

25

Ta [C]

75 85

40 25

0

25

Ta [C]

2. 12 High side power MOS FET leakage current (I_HSW

vs. Temperature (Ta)

)

2. 13 Low side power MOS FET leakage current (I_LSW

vs. Temperature (Ta)

)

300

250

200

150

300

250

V

DD = 5.5 V

200

150

100

50

V

DD = 3.6 V

V

DD = 5.5 V

V

DD = 3.6 V

100

50

0

V

DD = 2.2 V

V

DD = 2.2 V

0

−40

−25

0

25

50

75 85

−40

−25

0

25

50

75 85

Ta [C]

2. 14 High level input voltage (V_SH) vs. Temperature (Ta) 2. 15 Low level input voltage (V_SL) vs. Temperature (Ta)

1.2

1.0

0.8

0.6

0.4

0.2

0.0

1.2

1.0

0.8

0.6

0.4

0.2

0.0

V

DD = 5.5 V

V

DD = 5.5 V

V

DD = 3.6 V

50

V

DD = 3.6 V

V

DD = 2.2 V

0

V

DD = 2.2 V

25

40



25

75 85

−40

−

0

25

Ta [C]

50

75 85

Ta [C]

26

SUPPLY VOLTAGE DIVIDED OUTPUT, 5.5 V INPUT, 50 mA SYNCHRONOUS STEP-DOWN SWITCHING REGULATOR WITH 260 nA QUIESCENT CURRENT

Rev.1.2_00

S-85S0P Series

2. 16 UVLO detection voltage (V_UVLO₋) vs. Temperature (Ta)

2. 17 UVLO release voltage (V_UVLO₊) vs. Temperature (Ta)

2.2

2.1

2.0

1.9

1.8

1.7

1.6

2.2

2.1

2.0

1.9

1.8

1.7

1.6

40

25

0

25

50

75 85

40



25

0

25

50

75 85

Ta [C]

27

SUPPLY VOLTAGE DIVIDED OUTPUT, 5.5 V INPUT, 50 mA SYNCHRONOUS STEP-DOWN SWITCHING REGULATOR WITH 260 nA QUIESCENT CURRENT

S-85S0P Series

Rev.1.2_00

Supply voltage divider block

2. 18 Output voltage (V_PMOUT) vs. Temperature (Ta)

2. 19 Output voltage (V_PMOUT) vs. Temperature (Ta)

V_PMOUT(S)= V_IN/2

V_PMOUT(S)= V_IN/3

3.0

2.0

2.5

1.5

V

DD = 5.5 V

VDD = 5.5 V

2.0

1.5

1.0

0.5

0.0

V

DD = 1.5 V

VDD = 1.5 V

1.0

0.5

0.0

V

DD = 3.6 V

VDD = 3.6 V

−40

−25

0

25

Ta [C]

50

75 85

−40

−25

0

25

Ta [C]

50

75 85

2. 20 Current consumption during operation (I_SS1P

vs. Temperature (Ta)

)

2. 21 Output offset voltage (V_POF) vs. Temperature (Ta)

1000

800

40

V

DD = 5.5 V

20

0

V

DD = 5.5 V

V

DD = 3.6 V

600

400

200

0

V

DD = 1.5 V

−

20

40

V

DD = 3.6 V

V

DD = 1.5 V

−

−40

−

25

0

25

50

75 85

−40

−25

0

25

Ta [C]

50

75 85

Ta [C]

2. 22 Set-up time (t_PU) vs. Temperature (Ta)

2. 23 Set-up time (t_PU) vs. Temperature (Ta)

V

_PMOUT(S)= V_IN/2, C_PM= 0.22 μF

V

_PMOUT(S)= V_IN/3, C_PM= 0.22 μF

10

8

10

8

V

DD = 5.5 V

V

DD = 5.5 V

V

DD = 3.6 V

V

DD = 3.6 V

6

VDD = 1.5 V

4

V

DD = 1.5 V

2

0

−40

−25

0

25

Ta [C]

50

75 85

−40

−25

0

25

50

75 85

Ta [C]

2. 24 PMEN pin input voltage (V_PSH) vs. Temperature (Ta) 2. 25 PMEN pin input voltage (V_PSL) vs. Temperature (Ta)

1.2

1.0

0.8

0.6

0.4

0.2

0.0

1.2

1.0

0.8

0.6

0.4

0.2

0.0

V

DD = 5.5 V

V

DD = 5.5 V

V

DD = 3.6 V

V

DD = 3.6 V

V

DD = 1.5 V

V

DD = 1.5 V

−40

−25

0

25

50

75 85

−40

−25

0

25

50

75 85

Ta [C]

28

SUPPLY VOLTAGE DIVIDED OUTPUT, 5.5 V INPUT, 50 mA SYNCHRONOUS STEP-DOWN SWITCHING REGULATOR WITH 260 nA QUIESCENT CURRENT

Rev.1.2_00

S-85S0P Series

3. Transient response characteristics

The external parts shown in Table 17 are used in "3. Transient response characteristics".

Table 17

Element Name

Inductor

Constant

2.2 μH

10 μF

Manufacturer

Part Number

Murata Manufacturing Co., Ltd.

DFE201210S-2R2M=P2

GRJ155R61A106ME12

Input capacitor

Output capacitor

10 μF

3. 1 Power-on (V_OUT= 1.8 V, V_IN= 0 V → 3.6 V, Ta = +25°C)

3. 1. 1 I_OUT= 0.1 mA

3. 1. 2 I_OUT= 50 mA

1,400

1,200

1,000

800

1,400

1,200

1,000

800

4

3

2

4

3

2

V

IN

V

OUT

1

600

400

200

0

600

400

200

0

I

L

−1

−2

−3

−4

−1

−2

−3

−4

−200

0

1

2

3

4

5

0

1

2

3

4

5

Time [ms]

3. 2 Transient response characteristics of EN pin

(V_OUT= 1.8 V, V_IN= 3.6 V, V_EN= 0 V → 3.6 V, Ta = +25°C)

3. 2. 1 I_OUT= 0.1 mA

3. 2. 2 I_OUT= 50 mA

1,400

1,200

1,000

800

1,400

1,200

1,000

800

4

3

2

4

3

2

V

EN

V

EN

V

OUT

V

OUT

1

600

400

200

0

600

400

200

0

I

L

−1

−2

−3

−4

−1

−2

−3

−4

I

L

−200

0

1

2

3

4

5

0

1

2

3

4

5

Time [ms]

3. 3 Power supply fluctuation (V_OUT= 1.8 V, Ta = +25°C)

3. 3. 1 I_OUT= 0.1 mA

3. 3. 2 I_OUT= 50 mA

V_IN= 3.6 V → 4.2 V → 3.6 V

2.10

2.00

1.90

1.80

1.70

2.10

5

4

3

2

1

5

4

3

2

1

V

IN

2.00

1.90

1.80

1.70

V

IN

V

OUT

V

OUT

0

10

20

30

40

50

0

10

20

30

40

50

Time [ms]

29

SUPPLY VOLTAGE DIVIDED OUTPUT, 5.5 V INPUT, 50 mA SYNCHRONOUS STEP-DOWN SWITCHING REGULATOR WITH 260 nA QUIESCENT CURRENT

S-85S0P Series

Rev.1.2_00

3. 4 Load fluctuation (V_OUT= 1.8 V, V_IN= 3.6 V, Ta = +25°C)

3. 4. 1 I_OUT= 0.1 mA → 10 mA → 0.1 mA

3. 4. 2 I_OUT= 0.1 mA → 50 mA → 0.1 mA

2.00

1.95

1.90

1.85

1.80

1.75

1.70

2.00

1.95

1.90

1.85

1.80

1.75

1.70

100

50

0

50

0

I

OUT

I

OUT

−50

−100

−150

−200

−50

−100

−150

−200

V

OUT

V

OUT

0

10

20

30

40

0

10

20

30

40

Time [ms]

 Reference Data

The external parts shown in Table 18 are used in " Reference Data".

Table 18

Condition

<1>

Inductor (L)

MBKK1608T2R2M (2.2 μH)

TAIYO YUDEN CO.,LTD.

DFE201210S-2R2M=P2 (2.2 μH) GRJ155R61A106ME12 (10 μF)

Murata Manufacturing Co., Ltd. Murata Manufacturing Co., Ltd.

Input Capacitor (C_IN)

GRM035R60J475ME15 (4.7 μF) GRM035R60J475ME15 (4.7 μF)

Murata Manufacturing Co., Ltd.

Output Capacitor (C_OUT)

Murata Manufacturing Co., Ltd.

GRJ155R61A106ME12 (10 μF)

Murata Manufacturing Co., Ltd.

<2>

1. V_OUT= 1.2 V (External parts: Condition<1>)

1. 1 Efficiency (η) vs. Output current (I_OUT

)

1. 2 Output voltage (V_OUT) vs. Output current (I_OUT)

100

1.5

80

1.4

60

40

20

0

1.3

1.2

1.1

1.0

VIN = 3.6 V

V

IN = 3.6 V

V

IN = 5.5 V

VIN = 5.5 V

0.001 0.01 0.1

1

10

100 1000

0.001 0.01 0.1

1

10

100 1000

I

OUT [mA]

IOUT [mA]

2. V_OUT= 1.8 V (External parts: Condition<1>)

2. 1 Efficiency (η) vs. Output current (I_OUT

)

2. 2 Output voltage (V_OUT) vs. Output current (I_OUT)

100

2.0

80

1.9

1.8

1.7

1.6

1.5

V

IN = 5.5 V

60

40

20

0

V

IN = 3.6 V

V

IN = 3.6 V

V

IN = 5.5 V

0.001 0.01 0.1

1

10

100 1000

0.001 0.01 0.1

1

10

100 1000

I

OUT [mA]

IOUT [mA]

30

SUPPLY VOLTAGE DIVIDED OUTPUT, 5.5 V INPUT, 50 mA SYNCHRONOUS STEP-DOWN SWITCHING REGULATOR WITH 260 nA QUIESCENT CURRENT

Rev.1.2_00

S-85S0P Series

3. V_OUT= 1.2 V (External parts: Condition<2>)

3. 1 Efficiency (η) vs. Output current (I_OUT

)

3. 2 Output voltage (V_OUT) vs. Output current (I_OUT)

100

1.5

80

1.4

V

IN = 3.6 V

60

40

20

0

1.3

1.2

1.1

1.0

V

IN = 3.6 V

V

IN = 5.5 V

V

IN = 5.5 V

0.001 0.01 0.1

1

10

100 1000

0.001 0.01 0.1

1

10

100 1000

I

OUT [mA]

I

OUT [mA]

4. V_OUT= 1.8 V (External parts: Condition<2>)

4. 1 Efficiency (η) vs. Output current (I_OUT

)

4. 2 Output voltage (V_OUT) vs. Output current (I_OUT)

100

2.0

V

IN = 5.5 V

80

1.9

1.8

1.7

1.6

1.5

V

IN = 3.6 V

60

40

20

0

V

IN = 5.5 V

V

IN = 3.6 V

0.001 0.01 0.1

1

10

100 1000

0.001 0.01 0.1

1

10

100 1000

I

OUT [mA]

IOUT [mA]

31

SUPPLY VOLTAGE DIVIDED OUTPUT, 5.5 V INPUT, 50 mA SYNCHRONOUS STEP-DOWN SWITCHING REGULATOR WITH 260 nA QUIESCENT CURRENT

S-85S0P Series

Rev.1.2_00

 Power Dissipation

SNT-8A

Tj = 125C max.

1.0

0.8

B

0.6

A

0.4

0.2

0.0

0

25

50

75

100 125 150 175

Ambient temperature (Ta) [C]

Board

Power Dissipation (P_D)

A

B

C

D

E

0.47 W

0.58 W

−

32

SNT-8A Test Board

IC Mount Area

Board A

(1)

Item

Specification

Size [mm]

Material

114.3 x 76.2 x t1.6

FR-4

2

Number of copper foil layer

Land pattern and wiring for testing: t0.070

1

-

2

3

4

Copper foil layer [mm]

Thermal via

-

74.2 x 74.2 x t0.070

-

Board B

(2)

Item

Size [mm]

Specification

114.3 x 76.2 x t1.6

Material

FR-4

Number of copper foil layer

4

Land pattern and wiring for testing: t0.070

74.2 x 74.2 x t0.035

74.2 x 74.2 x t0.070

-

1

2

3

4

Copper foil layer [mm]

Thermal via

No. SNT8A-A-Board-SD-1.0

ABLIC Inc.

1.97±0.03

6

5

8

7

+0.05

-0.02

0.08

1

2

3

4

0.5

0.48±0.02

0.2±0.05

No. PH008-A-P-SD-2.1

TITLE

SNT-8A-A-PKG Dimensions

PH008-A-P-SD-2.1

No.

ANGLE

UNIT

mm

ABLIC Inc.

+0.1

-0

4.0±0.1

2.0±0.05

0.25±0.05

ø1.5

0.65±0.05

ø0.5±0.1

4.0±0.1

2.25±0.05

4 3 2 1

5 6 7 8

Feed direction

No. PH008-A-C-SD-2.0

TITLE

SNT-8A-A-Carrier Tape

PH008-A-C-SD-2.0

No.

ANGLE

UNIT

mm

ABLIC Inc.

12.5max.

9.0±0.3

Enlarged drawing in the central part

ø13±0.2

(60°)

No. PH008-A-R-SD-1.0

SNT-8A-A-Reel

TITLE

No.

PH008-A-R-SD-1.0

5,000

QTY.

ANGLE

UNIT

mm

ABLIC Inc.

0.52

2

2.01

0.52

1

0.2

0.3

1.

2.

(0.25 mm min. / 0.30 mm typ.)

(1.96 mm ~ 2.06 mm)

1.

2.

0.03 mm

3.

4.

SNT

1. Pay attention to the land pattern width (0.25 mm min. / 0.30 mm typ.).

2. Do not widen the land pattern to the center of the package (1.96 mm to 2.06mm).

Caution 1. Do not do silkscreen printing and solder printing under the mold resin of the package.

2. The thickness of the solder resist on the wire pattern under the package should be 0.03 mm

or less from the land pattern surface.

3. Match the mask aperture size and aperture position with the land pattern.

4. Refer to "SNT Package User's Guide" for details.

(0.25 mm min. / 0.30 mm typ.)

(1.96 mm ~ 2.06 mm)

1.

2.

SNT-8A-A

-Land Recommendation

TITLE

No.

No. PH008-A-L-SD-4.1

PH008-A-L-SD-4.1

ANGLE

UNIT

mm

ABLIC Inc.

Disclaimers (Handling Precautions)

1. All the information described herein (product data, specifications, figures, tables, programs, algorithms and application

circuit examples, etc.) is current as of publishing date of this document and is subject to change without notice.

2. The circuit examples and the usages described herein are for reference only, and do not guarantee the success of

any specific mass-production design.

ABLIC Inc. is not responsible for damages caused by the reasons other than the products described herein

(hereinafter "the products") or infringement of third-party intellectual property right and any other right due to the use

of the information described herein.

3. ABLIC Inc. is not responsible for damages caused by the incorrect information described herein.

4. Be careful to use the products within their specified ranges. Pay special attention to the absolute maximum ratings,

operation voltage range and electrical characteristics, etc.

ABLIC Inc. is not responsible for damages caused by failures and / or accidents, etc. that occur due to the use of the

products outside their specified ranges.

5. When using the products, confirm their applications, and the laws and regulations of the region or country where they

are used and verify suitability, safety and other factors for the intended use.

6. When exporting the products, comply with the Foreign Exchange and Foreign Trade Act and all other export-related

laws, and follow the required procedures.

7. The products must not be used or provided (exported) for the purposes of the development of weapons of mass

destruction or military use. ABLIC Inc. is not responsible for any provision (export) to those whose purpose is to

develop, manufacture, use or store nuclear, biological or chemical weapons, missiles, or other military use.

8. The products are not designed to be used as part of any device or equipment that may affect the human body, human

life, or assets (such as medical equipment, disaster prevention systems, security systems, combustion control

systems, infrastructure control systems, vehicle equipment, traffic systems, in-vehicle equipment, aviation equipment,

aerospace equipment, and nuclear-related equipment), excluding when specified for in-vehicle use or other uses. Do

not apply the products to the above listed devices and equipments without prior written permission by ABLIC Inc.

Especially, the products cannot be used for life support devices, devices implanted in the human body and devices

that directly affect human life, etc.

Prior consultation with our sales office is required when considering the above uses.

ABLIC Inc. is not responsible for damages caused by unauthorized or unspecified use of our products.

9. Semiconductor products may fail or malfunction with some probability.

The user of the products should therefore take responsibility to give thorough consideration to safety design including

redundancy, fire spread prevention measures, and malfunction prevention to prevent accidents causing injury or

death, fires and social damage, etc. that may ensue from the products' failure or malfunction.

The entire system must be sufficiently evaluated and applied on customer's own responsibility.

10. The products are not designed to be radiation-proof. The necessary radiation measures should be taken in the

product design by the customer depending on the intended use.

11. The products do not affect human health under normal use. However, they contain chemical substances and heavy

metals and should therefore not be put in the mouth. The fracture surfaces of wafers and chips may be sharp. Be

careful when handling these with the bare hands to prevent injuries, etc.

12. When disposing of the products, comply with the laws and ordinances of the country or region where they are used.

13. The information described herein contains copyright information and know-how of ABLIC Inc.

The information described herein does not convey any license under any intellectual property rights or any other

rights belonging to ABLIC Inc. or a third party. Reproduction or copying of the information from this document or any

part of this document described herein for the purpose of disclosing it to a third-party without the express permission

of ABLIC Inc. is strictly prohibited.

14. For more details on the information described herein, contact our sales office.

2.2-2018.06

www.ablic.com


型号：	S-85S0PD10-I8T1U
厂家：	ABLIC
描述：	SUPPLY VOLTAGE DIVIDED OUTPUT, 5.5 V INPUT, 50 mA SYNCHRONOUS STEP-DOWN SWITCHING REGULATOR WITH 260 nA QUIESCENT CURRENT 输入元件开关输出元件
文件：	总38页 (文件大小：1367K)
中文：	中文翻译
下载：	下载PDF数据表文档文件

S-85S0PD10-I8T1U [ABLIC]

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