ST2L05R2800PT_技术文档

ST2L05

VERY LOW QUIESCENT CURRENT

DUAL VOLTAGE REGULATOR

■

V

= 1.5, 1.8, 2.5, 2.8, 3.0, 3.3V FIXED

= 1.5, 1.8, 2.5, 2.8, 3.0, 3.3V FIXED OR

O1

O2

ADJUSTABLE FROM 1.25 TO V - V

I

DROP

■

GUARANTEED OUTPUT1 CURRENT: 1A

GUARANTEED OUTPUT2 CURRENT: 1A

± 2% OUTPUT TOLERANCE (AT 25°C)

± 3% OUTPUT TOLERANCE OVER TEMP.

SPAK-5L

PPAK

TYPICAL DROPOUT 1.1V (I = I = 1A)

O1

O2

INTERNAL POWER AND THERMAL LIMIT

STABLE WITH LOW ESR OUTPUT

CAPACITOR

■

OPERATING TEMPERATURE RANGE:

0°C TO 125°C

VERY LOW QUIESCENT CURRENT: 7mA

MAX OVER TEMP.

AVAILABLE IN PPAK, SPAK AND IN DFN

5x6mm PACKAGE

DFN

chosen version. The second one may be fixed to

the same values or adjustable from 1.25V to V -

I

DESCRIPTION

Specifically designed

V

that could power several kind of different

DROP

for

data

storage

micro-controllers. Both outputs are current limited

and over temperature protected. It is worth

underlining the very good thermal performance of

the packages SPAK and DFN with only 2°C/W of

applications, this device integrates two voltage

regulators, each one able to supply 1A and it is

assembled in PPAK, in SPAK and in a new 8-PIN

surface mounting package named DFN 5x6mm at

8 pins. The first regulator block supplies 1.5V,

1.8V, 2.5V, 2.8V, 3.0V, 3.3V depending on the

Thermal

Resistance

Junction

to

Case.

Applications are HARD DISK, CD/DVD-ROM, CD/

DVD-R/RW, COMBO (DVD-ROM+CD-R/RW).

BLOCK DIAGRAM OF FIXED/ADJ VERSION

October 2003

1/24

ST2L05

BLOCK DIAGRAM OF FIXED/FIXED VERSION

2/24

ST2L05

ORDERING CODES

(1)

V

O2

SPAK

PPAK

DFN

SHIPMENT

O1

1.5 V

1.8 V

2.5 V

2.8 V

3.0 V

3.3 V

1.5 V

1.8 V

2.5 V

2.8 V

3.0 V

3.3 V

ADJ

ST2L05R1515K5 (*)

ST2L05R1518K5 (*)

ST2L05R1525K5 (*)

ST2L05R1528K5 (*)

ST2L05R1530K5 (*)

ST2L05R1533K5 (*)

ST2L05R1500K5 (*)

ST2L05R1815K5 (*)

ST2L05R1818K5 (*)

ST2L05R1825K5 (*)

ST2L05R1828K5 (*)

ST2L05R1830K5 (*)

ST2L05R1833K5 (*)

ST2L05R1800K5 (*)

ST2L05R2515K5 (*)

ST2L05R2518K5 (*)

ST2L05R2525K5 (*)

ST2L05R2528K5 (*)

ST2L05R2530K5 (*)

ST2L05R2533K5 (*)

ST2L05R2500K5 (*)

ST2L05R2815K5 (*)

ST2L05R2818K5 (*)

ST2L05R2825K5 (*)

ST2L05R2828K5 (*)

ST2L05R2830K5 (*)

ST2L05R2833K5 (*)

ST2L05R2800K5 (*)

ST2L05R3015K5 (*)

ST2L05R3018K5 (*)

ST2L05R3025K5 (*)

ST2L05R3028K5 (*)

ST2L05R3030K5 (*)

ST2L05R3033K5 (*)

ST2L05R3000K5 (*)

ST2L05R3315K5 (*)

ST2L05R3318K5 (*)

ST2L05R3325K5 (*)

ST2L05R3328K5 (*)

ST2L05R3330K5 (*)

ST2L05R3333K5 (*)

ST2L05R3300K5

ST2L05R1515PT (*)

ST2L05R1518PT (*)

ST2L05R1525PT (*)

ST2L05R1528PT (*)

ST2L05R1530PT (*)

ST2L05R1533PT (*)

ST2L05R1500PT

ST2L05R1515PS (*)

ST2L05R1518PS (*)

ST2L05R1525PS (*)

ST2L05R1528PS (*)

ST2L05R1530PS (*)

ST2L05R1533PS (*)

ST2L05R1500PS (*)

ST2L05R1815PS (*)

ST2L05R1818PS (*)

ST2L05R1825PS (*)

ST2L05R1828PS (*)

ST2L05R1830PS (*)

ST2L05R1833PS (*)

ST2L05R1800PS (*)

ST2L05R2515PS (*)

ST2L05R2518PS (*)

ST2L05R2525PS (*)

ST2L05R2528PS (*)

ST2L05R2530PS (*)

ST2L05R2533PS (*)

ST2L05R2500PS (*)

ST2L05R2815PS (*)

ST2L05R2818PS (*)

ST2L05R2825PS (*)

ST2L05R2828PS (*)

ST2L05R2830PS (*)

ST2L05R2833PS (*)

ST2L05R2800PS (*)

ST2L05R3015PS (*)

ST2L05R3018PS (*)

ST2L05R3025PS (*)

ST2L05R3028PS (*)

ST2L05R3030PS (*)

ST2L05R3033PS (*)

ST2L05R3000PS (*)

ST2L05R3315PS (*)

ST2L05R3318PS (*)

ST2L05R3325PS

Tape & Reel

1.5 V

1.8 V

2.5 V

2.8 V

3.0 V

3.3 V

ADJ

ST2L05R1815PT (*)

ST2L05R1818PT (*)

ST2L05R1825PT

ST2L05R1828PT (*)

ST2L05R1830PT (*)

ST2L05R1833PT (*)

ST2L05R1800PT

1.5 V

1.8 V

2.5 V

2.8 V

3.0 V

3.3 V

ADJ

ST2L05R2515PT (*)

ST2L05R2518PT (*)

ST2L05R2525PT (*)

ST2L05R2528PT (*)

ST2L05R2530PT (*)

ST2L05R2533PT (*)

ST2L05R2500PT

1.5 V

1.8 V

2.5 V

2.8 V

3.0 V

3.3 V

ADJ

ST2L05R2815PT (*)

ST2L05R2818PT (*)

ST2L05R2825PT (*)

ST2L05R2828PT (*)

ST2L05R2830PT (*)

ST2L05R2833PT (*)

ST2L05R2800PT (*)

ST2L05R3015PT (*)

ST2L05R3018PT (*)

ST2L05R3025PT (*)

ST2L05R3028PT (*)

ST2L05R3030PT (*)

ST2L05R3033PT (*)

ST2L05R3000PT (*)

ST2L05R3315PT (*)

ST2L05R3318PT

1.5 V

1.8 V

2.5 V

2.8 V

3.0 V

3.3 V

ADJ

1.5 V

1.8 V

2.5 V

2.8 V

3.0 V

3.3 V

ADJ

ST2L05R3325PT

ST2L05R3328PT (*)

ST2L05R3330PT (*)

ST2L05R3333PT (*)

ST2L05R3300PT

ST2L05R3328PS (*)

ST2L05R3330PS (*)

ST2L05R3333PS (*)

ST2L05R3300PS

(*) Available on request.

(1) For Tube Shipment, change "R" with "-" in the relevant ordering code, DFN is available only in Tape & Reel.

3/24

ST2L05

ABSOLUTE MAXIMUM RATINGS

Symbol

Parameter

Value

Unit

V

Operating Input Voltage

Power Dissipation

10

V

I

P

Internally Limited

0 to 150

D

I

Short Circuit Output Current - 3.3 V and adjustable output

Operating Junction Temperature Range

OSH

T

°C

op

(*)

T

-65 to 150

260

Storage Temperature Range

stg

T

Lead Temperature (Soldering) 10 Sec.

LEAD

(*) Storage temperatures > 125°C are only acceptable if the Dual Regulator is soldered to a PCBA.

Absolute Maximum Ratings are those beyond which damage to the device may occur. Functional operation under these condition is not im-

plied.

RECOMMENDED OPERATING CONDITIONS

Symbol

Parameter

Value

Unit

V

Input Voltage

4.5 to 7

± 0.15

≥ 1

V

I

∆V

Input Voltage Ripple

V

I

t

Input Voltage Rise Time (from 10% to 90%)

Input Voltage Fall Time (from 10% to 90%)

µsec

RISE

t

≥ 1

FALL

THERMAL DATA

Symbol

Parameter

SPAK

DFN

PPAK

Unit

R

Thermal Resistance Junction-case

Thermal Resistance Junction-ambient

2

8

°C/W

thj-case

R

26

36

100

thj-amb

CONNECTION DIAGRAM (top view for PPAK and SPAK, top through view for DFN8)

PPAK

SPAK

DFN8

PIN DESCRIPTION

PPAK/SPAK

DFN

Symbol

Name and Function

1

3

V

Bypass with a 4.7µF capacitor to GND

I

2

3

4

8

5

ADJ/N.C.

GND

Resistor divider connection/Not Connected

Ground

V

Adjustable output voltage: bypass with a 4.7µF capacitor to GND

Fixed output voltage: bypass with a 4.7µF capacitor to GND

Not Connected

O2

O1

5

7

1, 2, 6

NC

4/24

ST2L05

APPLICATION CIRCUIT OF FIXED/FIXED VERSION

APPLICATION CIRCUIT OF FIXED/ADJ VERSION

NOTE: The regulator is designed to be stable with either tantalum or ceramic capacitors on the input and outputs. The expected values of

the input and output X7R ceramic capacitors are from 4.7µF to 22µF with 4.7µF typical. The input capacitor must be connected within 0.5

inches of the V terminal. The output capacitors must also be connected within 0.5 inches of output pins V and V . There is no upper limit

I

O1

O2

to the size of the input capacitor (for more details see the Application Hints section).

NOTE: In the Fixed/ADJ version, the adjustable output voltage V is designed to support output voltages from 1.25V to V - V . The

DROP

O2

I

adjustable output voltage V is set by a resistor divider connected between V (pin4) and Ground (pin3) with its centre tap connected to

O2

V

ADJ (pin2). The voltage divider resistors are: R connected to V and V ADJ and R connected to V ADJ and GND. V is deter-

1 O2 O2 2 O2 O2

O2

mined by V

, R , R , and I

as follows (for more details see the Application Hints section):

ADJ

REF

1

2

V

= V

(1+R /R ) + I

R

ADJ 1

O2

REF

1

2

5/24

ST2L05

OUTPUT1 AND OUTPUT2 DUAL SPECIFICATION (I = 10mA to 1A, T = 0 to 125°C, V = 4.5V to 7V,

O

J

I

C = 4.7µF, C = C = 4.7µF, otherwise specified)

I

O1

O2

Symbol

Parameter

Test Conditions

Min.

Typ.

Max.

Unit

mA

A

I

Quiescent Current (Fixed/ADJ) V ≤ 7V

I

= 5mA to 1A

5

7

GND

I

OUT1,2

Quiescent Current (Fixed/Fixed) V ≤ 7V

I

OUT1,2

I

Total Current Limit I + I

O2

2

ST

O1

T

Thermal Shutdown

175

5

°C

SHDN

DT

Thermal Shutdown Hysteresis

°C

SHDN

ELECTRICAL CHARACTERISTICS OF FIXED OUTPUT 1.5V (I = 10mA to 1A, T = 0 to 125°C,

O

J

V = 4.5V to 7V, C = 4.7µF, C = C = 4.7µF, otherwise specified)

I

O1

O2

Symbol

Parameter

Test Conditions

= 5mA to 1A, V = 4.75 to 5.25V

Min.

Typ.

Max.

Unit

V

Output Voltage 1.5V

I

1.47

1.5

1.53

V

O

I

T = 25°C

= 5mA to 1A, V = 4.75 to 5.25V

V

Output Voltage 1.5V

Line Regulation

I

1.455

1.5

1.545

15

V

mV

V

O

I

∆V

V = 4.75 to 5.25V, I = 5mA to 1A

I O

O

Load Regulation

V = 4.75V, I = 10mA to 1A

12

I

O

V

Dropout Voltage ∆V = -1% I = 1A

1.3

D

O

I

Current Limit

V = 5.5V

1

A

S

I

Min Output Current for

regulation

0

mA

OMIN

(1)(4)

e

T = 25°C

0.003

%

N

RMS Output Noise

Supply Voltage

SVR

V = 5V

60

dB

I

(2)(4)

Rejection

(5)

∆V /∆I

Transient Response

V = 5V, I = 1mA to 1A, t ≥ 1µs

%

O

I

O

r

10

Change of V with step

O

(5)

V = 5V, I = 1A to 1mA, t ≥ 1µs

I

O

f

10

(3)(4)

load change

(5)

∆V /∆V Transient Response

0 to 5V step input, I = 1mA to 1A,

O1

I

O

10

Change of V

with

t ≥ 1µs

OUT1

(3)(4)

r

application of V

I

(5)

∆V /∆I

Transient Response Short V = 5V, I = short to I = 10mA

%

O

I

O

20

Circuit Removal

(3)(4)

Response

(4)

T

I

= 1A, t

= 30ms

0.1

0.5

0.3

%/W

%

R

O

PULSE

Thermal Regulation

(4)

S

Temperature Stability

(4)

S

T = 125°C

%

Long Term Stability

(1000Hrs)

J

NOTE 1: Bandwidth of 10 Hz to 10KHz.

NOTE 2: 120Hz input ripple.

NOTE 3: C = 20µF, C and C = 10µF. C , C and C are all X7R ceramic capacitors.

I

1

O2

I

O1

O2

NOTE 4: Guaranteed by design, not tested in production.

NOTE 5: % undershoot or overshoot of V .

O

6/24

ST2L05

ELECTRICAL CHARACTERISTICS OF FIXED OUTPUT 1.8V (I = 10mA to 1A, T = 0 to 125°C,

O

J

V = 4.5V to 7V, C = 4.7µF, C = C = 4.7µF, otherwise specified)

I

O1

O2

Symbol

Parameter

Test Conditions

= 5mA to 1A, V = 4.75 to 5.25V

Min.

Typ.

Max.

Unit

V

Output Voltage 1.8V

I

1.764

1.8

1.836

V

O

I

T = 25°C

= 5mA to 1A, V = 4.75 to 5.25V

V

Output Voltage 1.8V

Line Regulation

I

1.746

1.8

1.854

15

V

mV

V

O

I

∆V

V = 4.75 to 5.25V, I = 5mA to 1A

I O

O

Load Regulation

V = 4.75V, I = 10mA to 1A

12

I

O

V

Dropout Voltage ∆V = -1% I = 1A

1.3

D

O

I

Current Limit

V = 5.5V

1

A

S

I

Min Output Current for

regulation

0

mA

OMIN

(1)(4)

e

T = 25°C

0.003

%

N

RMS Output Noise

Supply Voltage

SVR

V = 5V

60

dB

I

(2)(4)

Rejection

(5)

∆V /∆I

Transient Response

V = 5V, I = 1mA to 1A, t ≥ 1µs

%

O

I

O

r

10

Change of V with step

O

(5)

V = 5V, I = 1A to 1mA, t ≥ 1µs

I

O

f

10

(3)(4)

load change

(5)

∆V /∆V Transient Response

0 to 5V step input, I = 1mA to 1A,

O1

I

O

10

Change of V

with

t ≥ 1µs

OUT1

(3)(4)

r

application of V

I

(5)

∆V /∆I

Transient Response Short V = 5V, I = short to I = 10mA

%

O

I

O

20

Circuit Removal

(3)(4)

Response

(4)

T

I

= 1A, t

= 30ms

0.1

0.5

0.3

%/W

%

R

Thermal Regulation

O

PULSE

(4)

S

Temperature Stability

(4)

S

T = 125°C

%

J

Long Term Stability

(1000Hrs)

NOTE 1: Bandwidth of 10 Hz to 10KHz.

NOTE 2: 120Hz input ripple.

NOTE 3: C = 20µF, C and C = 10µF. C , C and C are all X7R ceramic capacitors.

I

1

O2

I

O1

O2

NOTE 4: Guaranteed by design, not tested in production.

NOTE 5: % undershoot or overshoot of V .

O

7/24

ST2L05

ELECTRICAL CHARACTERISTICS OF FIXED OUTPUT 2.5V (I = 10mA to 1A, T = 0 to 125°C,

O

J

V = 4.5V to 7V, C = 4.7µF, C = C = 4.7µF, otherwise specified)

I

O1

O2

Symbol

Parameter

Test Conditions

= 5mA to 1A, V = 4.75 to 5.25V

Min.

Typ.

Max.

Unit

V

Output Voltage 2.5V

I

2.45

2.5

2.55

V

O

I

T = 25°C

= 5mA to 1A, V = 4.75 to 5.25V

V

Output Voltage 2.5V

Line Regulation

I

2.425

2.5

2.575

15

V

mV

V

O

I

∆V

V = 4.75 to 5.25V, I = 5mA to 1A

I O

O

Load Regulation

V = 4.75V, I = 10mA to 1A

12

I

O

V

Dropout Voltage ∆V = -1% I = 1A

1.3

D

O

I

Current Limit

V = 5.5V

1

A

S

I

Min Output Current for

regulation

0

mA

OMIN

(1)(4)

e

T = 25°C

0.003

%

N

RMS Output Noise

Supply Voltage

SVR

V = 5V

60

dB

I

(2)(4)

Rejection

(5)

∆V /∆I

Transient Response

V = 5V, I = 1mA to 1A, t ≥ 1µs

%

O

I

O

r

10

Change of V with step

O

(5)

V = 5V, I = 1A to 1mA, t ≥ 1µs

I

O

f

10

(3)(4)

load change

(5)

∆V /∆V Transient Response

0 to 5V step input, I = 1mA to 1A,

O1

I

O

10

Change of V

with

t ≥ 1µs

OUT1

(3)(4)

r

application of V

I

(5)

∆V /∆I

Transient Response Short V = 5V, I = short to I = 10mA

%

O

I

O

20

Circuit Removal

(3)(4)

Response

(4)

T

I

= 1A, t

= 30ms

0.1

0.5

0.3

%/W

%

R

O

PULSE

Thermal Regulation

(4)

S

Temperature Stability

(4)

S

T = 125°C

%

J

Long Term Stability

(1000Hrs)

NOTE 1: Bandwidth of 10 Hz to 10KHz.

NOTE 2: 120Hz input ripple.

NOTE 3: C = 20µF, C and C = 10µF. C , C and C are all X7R ceramic capacitors.

I

1

O2

I

O1

O2

NOTE 4: Guaranteed by design, not tested in production.

NOTE 5: % undershoot or overshoot of V .

O

8/24

ST2L05

ELECTRICAL CHARACTERISTICS OF FIXED OUTPUT 2.8V (I = 10mA to 1A, T = 0 to 125°C,

O

J

V = 4.5V to 7V, C = 4.7µF, C = C = 4.7µF, otherwise specified)

I

O1

O2

Symbol

Parameter

Test Conditions

= 5mA to 1A, V = 4.75 to 5.25V

Min.

Typ.

Max.

Unit

V

Output Voltage 2.8V

I

2.744

2.8

2.856

V

O

I

T = 25°C

= 5mA to 1A, V = 4.75 to 5.25V

V

Output Voltage 2.8V

Line Regulation

I

2.716

2.8

2.884

15

V

mV

V

O

I

∆V

V = 4.75 to 5.25V, I = 5mA to 1A

I O

O

Load Regulation

V = 4.75V, I = 10mA to 1A

12

I

O

V

Dropout Voltage ∆V = -1% I = 1A

1.3

D

O

I

Current Limit

V = 5.5V

1

A

S

I

Min Output Current for

regulation

0

mA

OMIN

(1)(4)

e

T = 25°C

0.003

%

N

RMS Output Noise

Supply Voltage

SVR

V = 5V

60

dB

I

(2)(4)

Rejection

(5)

∆V /∆I

Transient Response

V = 5V, I = 1mA to 1A, t ≥ 1µs

%

O

I

O

r

10

Change of V with step

O

(5)

V = 5V, I = 1A to 1mA, t ≥ 1µs

I

O

f

10

(3)(4)

load change

(5)

∆V /∆V Transient Response

0 to 5V step input, I = 1mA to 1A,

O1

I

O

10

Change of V

with

t ≥ 1µs

OUT1

(3)(4)

r

application of V

I

(5)

∆V /∆I

Transient Response Short V = 5V, I = short to I = 10mA

%

O

I

O

20

Circuit Removal

(3)(4)

Response

(4)

T

I

= 1A, t

= 30ms

0.1

0.5

0.3

%/W

%

R

Thermal Regulation

O

PULSE

(4)

S

Temperature Stability

(4)

S

T = 125°C

%

J

Long Term Stability

(1000Hrs)

NOTE 1: Bandwidth of 10 Hz to 10KHz.

NOTE 2: 120Hz input ripple.

NOTE 3: C = 20µF, C and C = 10µF. C , C and C are all X7R ceramic capacitors.

I

1

O2

I

O1

O2

NOTE 4: Guaranteed by design, not tested in production.

NOTE 5: % undershoot or overshoot of V .

O

9/24

ST2L05

ELECTRICAL CHARACTERISTICS OF FIXED OUTPUT 3.0V (I = 10mA to 1A, T = 0 to 125°C,

O

J

V = 4.5V to 7V, C = 4.7µF, C = C = 4.7µF, otherwise specified)

I

O1

O2

Symbol

Parameter

Test Conditions

= 5mA to 1A, V = 4.75 to 5.25V

Min.

Typ.

Max.

Unit

V

Output Voltage 3.0V

I

2.94

3.0

3.06

V

O

I

T = 25°C

= 5mA to 1A, V = 4.75 to 5.25V

V

Output Voltage 3.0V

Line Regulation

I

2.91

3.0

3.09

15

V

mV

V

O

I

∆V

V = 4.75 to 5.25V, I = 5mA to 1A

I O

O

Load Regulation

V = 4.75V, I = 10mA to 1A

12

I

O

V

Dropout Voltage ∆V = -1% I = 1A

1.3

D

O

I

Current Limit

V = 5.5V

1

A

S

I

Min Output Current for

regulation

0

mA

OMIN

(1)(4)

e

T = 25°C

0.003

%

N

RMS Output Noise

Supply Voltage

SVR

V = 5V

60

dB

I

(2)(4)

Rejection

(5)

∆V /∆I

Transient Response

V = 5V, I = 1mA to 1A, t ≥ 1µs

%

O

I

O

r

10

Change of V with step

O

(5)

V = 5V, I = 1A to 1mA, t ≥ 1µs

I

O

f

10

(3)(4)

load change

(5)

∆V /∆V Transient Response

0 to 5V step input, I = 1mA to 1A,

O1

I

O

10

Change of V

with

t ≥ 1µs

OUT1

(3)(4)

r

application of V

I

(5)

∆V /∆I

Transient Response Short V = 5V, I = short to I = 10mA

%

O

I

O

20

Circuit Removal

(3)(4)

Response

(4)

T

I

= 1A, t

= 30ms

0.1

0.5

0.3

%/W

%

R

Thermal Regulation

O

PULSE

(4)

S

Temperature Stability

(4)

S

T = 125°C

%

J

Long Term Stability

(1000Hrs)

NOTE 1: Bandwidth of 10 Hz to 10KHz.

NOTE 2: 120Hz input ripple.

NOTE 3: C = 20µF, C and C = 10µF. C , C and C are all X7R ceramic capacitors.

I

1

O2

I

O1

O2

NOTE 4: Guaranteed by design, not tested in production.

NOTE 5: % undershoot or overshoot of V .

O

10/24

ST2L05

ELECTRICAL CHARACTERISTICS OF FIXED OUTPUT 3.3V (I = 10mA to 1A, T = 0 to 125°C,

O

J

V = 4.5V to 7V, C = 4.7µF, C = C = 4.7µF, otherwise specified)

I

O1

O2

Symbol

Parameter

Test Conditions

= 5mA to 1A, V = 4.75 to 5.25V

Min.

Typ.

Max.

Unit

V

Output Voltage 3.3V

I

3.234

3.3

3.366

V

O

I

T = 25°C

= 5mA to 1A, V = 4.75 to 5.25V

V

Output Voltage 3.3V

Line Regulation

I

3.2

3.3

3.4

15

V

mV

V

O

I

∆V

V = 4.75 to 5.25V, I = 5mA to 1A

I O

O

Load Regulation

V = 4.75V, I = 10mA to 1A

12

I

O

V

Dropout Voltage ∆V = -1% I = 1A

1.3

D

O

I

Current Limit

V = 5.5V

1

A

S

I

Min Output Current for

regulation

0

mA

OMIN

(1)(4)

e

T = 25°C

0.003

%

N

RMS Output Noise

Supply Voltage

SVR

V = 5V

60

dB

I

(2)(4)

Rejection

(5)

∆V /∆I

Transient Response

V = 5V, I = 1mA to 1A, t ≥ 1µs

%

O

I

O

r

10

Change of V with step

O

(5)

V = 5V, I = 1A to 1mA, t ≥ 1µs

I

O

f

10

(3)(4)

load change

(5)

∆V /∆V Transient Response

0 to 5V step input, I = 1mA to 1A,

O1

I

O

10

Change of V

with

t ≥ 1µs

OUT1

(3)(4)

r

application of V

I

(5)

∆V /∆I

Transient Response Short V = 5V, I = short to I = 10mA

%

O

I

O

20

Circuit Removal

(3)(4)

Response

(4)

T

I

= 1A, t

= 30ms

0.1

0.5

0.3

%/W

%

R

Thermal Regulation

O

PULSE

(4)

S

Temperature Stability

(4)

S

T = 125°C

%

J

Long Term Stability

(1000Hrs)

NOTE 1: Bandwidth of 10 Hz to 10KHz.

NOTE 2: 120Hz input ripple.

NOTE 3: C = 20µF, C and C = 10µF. C , C and C are all X7R ceramic capacitors.

I

1

O2

I

O1

O2

NOTE 4: Guaranteed by design, not tested in production.

NOTE 5: % undershoot or overshoot of V .

O

11/24

ST2L05

ELECTRICAL CHARACTERISTICS OF ADJUSTABLE OUTPUT (I = 10mA to 1A, T = 0 to 125°C,

O

J

V = 4.5V to 7V, C = 4.7µF, C = C = 4.7µF, otherwise specified)

I

O1

O2

Symbol

Parameter

Test Conditions

= 5mA to 1A, V = 4.75 to 5.25V,

Min.

Typ.

Max.

Unit

V

Reference Voltage

I

1.225

1.25

1.275

V

O

I

T = 25°C

= 5mA to 1A, V = 4.75 to 5.25V

V

Reference Voltage

Line Regulation 2

Load Regulation 2

I

1.212

1.25

1.287

0.35

0.4

V

%

O

I

∆V

V = 4.75 to 5.25V, I = 5mA to 1A

I O

O2

D

V = 4.75V, I = 10mA to 1A

%

I

O

V

Dropout Voltage ∆V = -1% I = 1A

1.3

V

O

I

Current Limit

V = 5.5V

1

A

S

I

Adjustable Current (sinking)

Adjustable Current Change

1

200

2

µA

nA

mA

ADJ

I

I = 10mA to 1A

O

∆ADJ

I

Min Output Current for

regulation

OMIN

(1)(4)

e

T = 25°C

V = 5V

0.003

%

N

RMS Output Noise

SVR

Supply Voltage

60

dB

I

(2)(4)

Rejection

(5)

∆V /∆I

Transient Response

V = 5V, I = 1mA to 1A, t ≥ 1µs

%

O2 O2

I

O

r

10

Change of V with step

O1

(5)

V = 5V, I = 1A to 1mA, t ≥ 1µs

I

O

f

10

(3)(4)

load change

(5)

∆V /∆V Transient Response

0 to 5V step input, I = 1mA to 1A,

O2

I

O

10

Change of V

with

t ≥ 1µs

OUT1

(3)(4)

r

application of V

I

(5)

∆V /∆I

Transient Response Short V = 5V, I = short to I = 10mA

%

O2 O2

I

O

20

Circuit Removal

(3)(4)

Response

(4)

T

I

= 1A, t

= 30ms

0.1

0.5

0.3

%/W

%

R

O

PULSE

Thermal Regulation

(4)

S

Temperature Stability

(4)

S

T = 125°C

%

Long Term Stability

(1000Hrs)

J

NOTE 1: Bandwidth of 10 Hz to 10KHz.

NOTE 2: 120Hz input ripple.

NOTE 3: C = 20µF, C and C = 10µF. C , C and C are all X7R ceramic capacitors.

I

1

O2

I

O1

O2

NOTE 4: Guaranteed by design, not tested in production.

NOTE 5: % undershoot or overshoot of V .

O

APPLICATION HINTS

EXTERNAL CAPACITORS

Like any low-dropout regulator, the ST2L05 requires external capacitors for stability. We suggest

soldering both capacitors as close as possible to the relative pins (1, 4 and 5).

INPUT CAPACITOR

An input capacitor, whose value is, at least, 2.2µF is required; the amount of the input capacitance can be

increased without limit if a good quality tantalum or aluminium capacitor is used.SMD X7R or Y5V ceramic

multilayer capacitors could not ensure stability in any condition because of their variable characteristics

with Frequency and Temperature; the use of this capacitor is strictly related to the use of the output

capacitors. For more details read the “OUTPUT CAPACITOR SECTION”.The input capacitor must be

located at a distance of not more than 0.5" from the input pin of the device and returned to a clean analog

ground.

OUTPUT CAPACITOR

The ST2L05 is designed specifically to work with Ceramic and Tantalum capacitors.Special care must be

taken when a Ceramic multilayer capacitor is used.Due to their characteristics they can sometimes have

an ESR value lower than the minimum required by the ST2L05 and their relatively large capacitance can

12/24

ST2L05

change a lot depending on the ambient temperature.The test results of the ST2L05 stability using

multilayer ceramic capacitors show that a minimum value of 2.2µF is needed for both regulators. This

value can be increased without limit if the input capacitor value is major or equal to 4.7µF, and up to 10µF

if the input capacitor is minor than 4.7µF.Surface-mountable solid tantalum capacitors offer a good

combination of small physical size for the capacitance value and ESR in the range needed by the ST2L05.

The test results show good stability for both outputs with values of at least 1µF. The value can be

increased without limit for even better performance such as transient response and noise.

IMPORTANT:

The output capacitor must maintain its ESR in the stable region over the full operating temperature to

assure stability. More over, capacitor tolerance and variations due to temperature must be considered to

assure that the minimum amount of capacitance is provided at all times. For this reason, when a Ceramic

multilayer capacitor is used, the better choice for temperature coefficient is the X7R type, which holds the

capacitance within ±15%. The output capacitor should be located not more than 0.5" from the output pins

of the device and returned to a clean analog ground.

ADJUSTABLE REGULATOR

The ST2L05 has a 1.25V reference voltage between the output and the adjust pins (respectively pin 4 and

2). When a resistor R is placed between these two terminals, a constant current flows through R and

1

down to R to set the overall (V

to GND) output voltage. Minimum load current is 2mA max in all

2

O2

temperature conditions.

APPLICATION CIRCUIT

V

= V

(1+R /R )+I

R

ADJ 1

O

REF

1

2

I

is very small (typically 35µA) and constant: in the V calculation it can be ignored.

ADJ

O

13/24

ST2L05

TYPICAL CHARACTERISTICS

Figure 1 : Reference Voltage vs Temperature

Figure 4 : Reference Voltage vs Input Voltage

Figure 2 : Reference Line Regulation vs

Figure 5 : Dropout Voltage vs Temperature

Temperature

(Adjustable Output)

Figure 3 : Reference Load Regulation vs

Figure 6 : Dropout Voltage vs Input Voltage

Temperature

(Adjustable Output)

14/24

ST2L05

Figure 7 : Minimum Load Current vs

Figure 10 : Line Regulation vs Temperature

Temperature (Adjustable Output)

Figure 8 : Adjust Pin Current vs Temperature

Figure 11 : Load Regulation vs Temperature

(Adjustable Output)

Figure 9 : Output Voltage vs Temperature

Figure 12 : Output Voltage vs Input Voltage

15/24

ST2L05

Figure 13 : Dropout Voltage vs Temperature

Figure 16 : Supply Voltage Rejection vs

(Fixed Output)

Frequency

Figure 14 : Dropout Voltage vs Input Voltage

Figure 17 : Quiescent Current vs Temperature

(Fixed/ADJ Version)

Figure 15 : Supply Voltage Rejection vs

Figure 18 : Quiescent Current vs Temperature

Temperature

(Fixed/Fixed Version)

16/24

ST2L05

Figure 19 : Short Circuit Removal Response

Figure 22 : Change of V with Step Load

O

Change

V =5V, I =short circuit to 10mA, C =10µF, C =22µF all ceramic

I

O

I

V =5V, I =1A to 1mA, C =10µF, C =22µF all ceramic X5R,

I O O I

X5R, T =25°C

J

T =25°C, t

=1µs

J

FALL

Figure 20 : Change of V with Step Load

Figure 23 : Short Circuit Removal Response

O

Change

V =5V, I =1mA to 1A, C =10µF, C =22µF all ceramic X5R,

V =5V, I =short circuit to 10mA, C =10µF, C =22µF all ceramic

I O O I

I

O

I

T =25°C

X5R, T =25°C

J

Figure 21 : Change of V with Step Load

Figure 24 : Change of V with Step Load

O

Change

V =5V, I =1mA to 1A, C =10µF, C =22µF all ceramic X5R,

I O O I

I

O

I

T =25°C, t

=1µs

T =25°C, t

=1µs

J

RISE

J

RISE

17/24

ST2L05

Figure 25 : Change of V with Step Load

Figure 27 : Start-Up Transient

O

Change

V =0 to 5V, I =1mA, C =10µF, C =22µF all ceramic X5R, T =25°C,

V =5V, I =1mA to 1A, C =10µF, C =22µF all ceramic X5R,

I

O

I

J

I

O

I

t ≤ 1µs

RISE

T =25°C, t

=t =1µs

J

RISE FALL

Figure 26 : Change of V with Step Load

Figure 28 : Start-Up Transient

O

Change

V =5V, I =1A to 1mA, C =10µF, C =22µF all ceramic X5R,

V =0 to 5V, I =1A, C =10µF, C =22µF all ceramic X5R, T =25°C,

I O O I J

I

O

I

T =25°C, t

J

=1µs

t

≤ 1µs

FALL

RISE

18/24

ST2L05

SPAK-5L MECHANICAL DATA

mm.

inch

TYP.

DIM.

MIN.

1.78

0.03

TYP

MAX.

2.03

MIN.

0.070

0.001

MAX.

0.080

0.005

A

A2

C

0.13

0.25

0.010

C1

D

1.02

7.87

0.63

1.27

8.13

0.79

0.040

0.310

0.025

0.050

0.320

0.031

D1

F

G

1.69

6.8

0.067

0.268

0.220

G1

H1

H2

H3

L

5.59

9.27

8.89

9.52

9.14

0.365

0.350

0.410

0.375

0.360

0.420

10.41

10.67

L1

L2

M

7.49

0.25

0.295

0.010

8.89

0.79

9.14

1.04

0.350

0.031

0.360

0.041

N

V

3˚

6˚

3˚

6˚

PO13F1/B

19/24

ST2L05

PPAK MECHANICAL DATA

mm.

inch

TYP.

DIM.

MIN.

2.2

TYP

MAX.

2.4

MIN.

0.086

0.035

0.001

0.015

0.204

0.017

0.019

0.236

0.252

0.193

0.093

0.368

MAX.

0.094

0.043

0.009

0.023

0.212

0.023

0.244

0.260

0.206

0.106

0.397

A

A1

A2

B

0.9

1.1

0.03

0.4

0.23

0.6

B2

C

5.2

5.4

0.45

0.48

6

0.6

C2

D

0.6

6.2

E

6.4

6.6

G

4.9

5.25

2.7

G1

H

2.38

9.35

10.1

L2

L4

0.8

0.031

0.6

1

0.023

0.039

0078180-B

20/24

ST2L05

DFN8 (5x6) MECHANICAL DATA

mm.

inch

TYP.

DIM.

MIN.

TYP

MAX.

MIN.

MAX.

A

A1

A3

b

0.80

0.90

0.02

0.20

0.40

5.00

4.2

1.00

0.032

0.035

0.001

0.008

0.016

0.197

0.165

0.236

0.142

0.049

0.078

0.086

0.015

0.0086

0.039

0.002

0.005

0.35

4.15

3.55

0.47

4.25

3.65

0.014

0.163

0.140

0.018

0.167

0.144

D

D2

E

6.00

3.6

E2

e

1.27

1.99

2.20

0.40

0.219

F

G

H

I

L

0.70

0.90

0.028

0.035

7286463/B

21/24

ST2L05

Tape & Reel SPAK-xL MECHANICAL DATA

mm.

TYP

inch

DIM.

MIN.

MAX.

180

MIN.

TYP.

MAX.

7.086

0.519

A

C

12.8

20.2

60

13.0

13.2

0.504

0.795

2.362

0.512

D

N

T

14.4

9.90

11.05

2.50

4.1

0.567

0.390

0.431

0.098

0.161

0.476

Ao

Bo

Ko

Po

P

9.70

10.85

2.30

3.9

9.80

10.95

2.40

4.0

0.382

0.423

0.090

0.153

0.468

0.386

0.427

0.094

0.157

0.472

11.9

12.0

12.1

22/24

ST2L05

Tape & Reel DPAK-PPAK MECHANICAL DATA

mm.

TYP

inch

TYP.

DIM.

MIN.

MAX.

330

MIN.

MAX.

12.992

0.519

A

C

12.8

20.2

60

13.0

13.2

0.504

0.795

2.362

0.512

D

N

T

14.4

7.00

10.60

2.75

4.1

0.567

0.2.76

0.417

0.105

0.161

0.319

Ao

Bo

Ko

Po

P

6.80

10.40

2.55

3.9

6.90

10.50

2.65

4.0

0.268

0.409

0.100

0.153

0.311

0.272

0.413

0.104

0.157

0.315

7.9

8.0

8.1

23/24

ST2L05

Information furnished is believed to be accurate and reliable. However, STMicroelectronics assumes no responsibility for the

consequences of use of such information nor for any infringement of patents or other rights of third parties which may result from

its use. No license is granted by implication or otherwise under any patent or patent rights of STMicroelectronics. Specifications

mentioned in this publication are subject to change without notice. This publication supersedes and replaces all information

previously supplied. STMicroelectronics products are not authorized for use as critical components in life support devices or

systems without express written approval of STMicroelectronics.

The ST logo is a registered trademark of STMicroelectronics

All other names are the property of their respective owners

STMicroelectronics GROUP OF COMPANIES

Australia - Belgium - Brazil - Canada - China - Czech Republic - Finland - France - Germany - Hong Kong - India - Israel - Italy - Japan -

Malaysia - Malta - Morocco - Singapore - Spain - Sweden - Switzerland - United Kingdom - United States.

http://www.st.com

24/24


型号：	ST2L05R2800PT
厂家：	ST
描述：	VERY LOW QUIESCENT CURRENT DUAL VOLTAGE REGULATOR 极低的静态电流双电压稳压器线性稳压器IC 调节器电源电路输出元件
文件：	总24页 (文件大小：636K)
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ST2L05R2800PT [STMICROELECTRONICS]

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