TPS60502DGSR [TI]

HIGH EFFICIENCY, 250-mA STEP-DOWN CHARGE PUMP; 高效率， 250 mA的降压充电泵


型号：	TPS60502DGSR
厂家：	TEXAS INSTRUMENTS
描述：	HIGH EFFICIENCY, 250-mA STEP-DOWN CHARGE PUMP 高效率， 250 mA的降压充电泵稳压器开关式稳压器或控制器电源电路开关式控制器光电二极管功效泵
文件：	总24页 (文件大小：1124K)
中文：	中文翻译
下载：	下载PDF数据表文档文件

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ꢀ ꢁꢂꢃ ꢄ ꢅ ꢄ ꢈ ꢆ ꢀꢁ ꢂ ꢃꢄ ꢅꢄ ꢉ

SLVS391B − OCTOBER 2001 − REVISED FEBRUARY 2002

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DSP Core Supply

FEATURES

Cellular Phones

Regulated 3.3-V, 1.8-V, 1.5-V, or Adjustable

Output Voltage

Portable Instruments

Internet Audio Player

PC Peripherals

Up to 250-mA Output Current

1.8-V to 6.5-V Input Voltage

Up to 90% Efficiency

USB Powered Applications

Output Voltage Tolerance 3% Over Line, Load,

and Temperature Variation

DESCRIPTION

The TPS6050x devices are a family of step-down

charge pumps that generate a regulated, fixed 3.3-V,

1.8-V, 1.5-V, or adjustable output voltage. Only four

small ceramic capacitors are required to build a

complete high efficiency dc/dc charge pump converter.

To achieve the high efficiency over a wide input voltage

range, the charge pump automatically selects between

three different conversion modes. The output can

deliver a maximum of 250-mA output current. The

power good function supervises the output voltage and

goes high when the output voltage rises to 97% of its

nominal value.

Device Quiescent Current Less Than 40 µA

Output Voltage Supervisor Included

(Power Good)

Internal Soft Start

Load Isolated From Battery During Shutdown

Overtemperature and Overcurrent Protected

Micro-Small 10-Pin MSOP Package

EVM Available, TPS60500EVM-193

APPLICATIONS

Personal Digital Assistants

Typical Application Circuit

TPS60503

EFFICIENCY

C1F

1 µF

C2F

1 µF

INPUT VOLTAGE

100

100 mA

50 mA

C1F− C1F+ C2F− C2F+

1.8 V

150 mA

INPUT

OUT

Li-ion cell

150 mA

VIN

10 µF

LDO

TPS60502

2.2 µF

OFF/ON

2.5

3.5

4.5

5.5

6.5

GND

V − Input Voltage − V

Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of

Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.

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SLVS391B − OCTOBER 2001 − REVISED FEBRUARY 2002

pin assignments

DGS PACKAGES

(TOP VIEW)

GND

C1F−

OUT

C1F+

C2F−

C2F+

VIN

ACTUAL SIZE

3,05 mm x 4,98 mm

AVAILABLE OPTIONS

MARKING DGS

PACKAGE

OUTPUT VOLTAGE

[V]

MINIMUM INPUT VOLTAGE

FOR I = 150 mA

†

PART NUMBER

Adjustable

(0.8 V to 3.3 V)

TPS60500DGS

AVB

V > V + 1

I O

TPS60501DGS

TPS60502DGS

TPS60503DGS

AVC

AVD

AVE

3.3

1.8

1.5

V > 4.3 V

V > 2.8 V

V > 2.5 V

†

The DGS package is available taped and reeled. Add R suffix to device type (e.g. TPS60500DGSR) to order

quantities of 2500 devices per reel.

Terminal Functions

TERMINAL

I/O

DESCRIPTION

NAME

C1F+

NO.

Positive terminal of the flying capacitor C1F

Negative terminal of the flying capacitor C1F

Positive terminal of the flying capacitor C2F

Negative terminal of the flying capacitor C2F

Device-enable Input.

C1F−

C2F+

C2F−

− EN = High disables the device. Output and input are isolated in shutdown mode.

− EN = Low enables the device.

GND

Ground

TPS60500: connect via voltage divider to V

TPS60501 to TPS60503: connect directly to V

OUT

Regulated 3.3 V, 1.8 V, 1.5 V, or adjustable power output

Bypass OUT to GND with the output filter capacitor C .

Open drain power good detector output. As soon as the voltage on OUT reaches about 97% of its nominal value this

pin goes high.

VIN

Supply Input. Connect to an input supply in the 1.8-V to 6.5-V range.

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SLVS391B − OCTOBER 2001 − REVISED FEBRUARY 2002

†

absolute maximum ratings over operating free-air temperature (unless otherwise noted)

Voltage range at VIN, EN, PG to GND (see Note 1) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . −0.3 V to 7 V

Voltage range at OUT, FB to GND . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . −0.3 V to 3.6 V

Voltage range at C1F+, C1F−, C2F+, C2F− to GND . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . −0.3 V to 7 V

Continuous power dissipation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . See Dissipation Rating Table

Output current at OUT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 300 mA

Storage temperature range, T

Maximum junction temperature, T . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 150°C

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . −55°C to 150°C

stg

†

Stresses beyond those listed under “absolute maximum ratings” may cause permanent damage to the device. These are stress ratings only, and

functional operation of the device at these or any other conditions beyond those indicated under “recommended operating conditions” is not

implied. Exposure to absolute-maximum-rated conditions for extended periods may affect device reliability.

NOTE 1: The voltage at EN, and PG can exceed VIN up to the maximum rated voltage without increasing the leakage current drawn by these

mode select inputs.

DISSIPATION RATING TABLE

≤ 25°C

DERATING FACTOR

= 70°C

T = 85°C

POWER RATING

PACKAGE

POWER RATING

ABOVE T = 25°C

POWER RATING

DGS

555 mW

5.56 mW/°C

305 mW

221 mW

NOTE: The thermal resistance junction to ambient of the DGS package when soldered on a PCB is R

≈ 180°C/W.

θJA

recommended operating conditions

MIN

NOM MAX

UNIT

Input voltage range at VIN, V

1.8

6.5

Output current range at OUT, I

250

µF

°C

Input capacitor, C

2.2

Flying capacitors, C1F, C2F

Output capacitor, C for I ≤ 150 mA

4.7

Output capacitor, C for 150 mA < I < 250 mA

Operating junction temperature, T

−40

125

RECOMMENDED CAPACITOR VALUES

O, max

[mA]

(xF)

[µF]

2.2

4.7

[µF]

0.22

[µF]

4.7

150

250

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SLVS391B − OCTOBER 2001 − REVISED FEBRUARY 2002

electrical characteristics at C = 4.7 µF, C1F = C2F = 1 µF, C = 10 µF, T = −40°C to 85°C,

V = 5 V, V

= GND (unless otherwise noted)

(EN)

PARAMETER

TEST CONDITIONS

MIN

1.8

TYP

MAX

6.5

UNIT

Supply voltage range

V = 1.8 V to 2.7 V, V −V > 1 V

150

250

0.8

V ≥ 2.7 V, V −V > 1 V

O =

1.5 V, V ≥ 3.1 V

Maximum output current

V ≥ 3.7 V, 1.8 V ≤ V ≤ 2.5 V

> 2.5 V, V > V + 1.2 V

TPS60500

TPS60501

TPS60502

TPS60503

TPS60500

TPS60501

3.3

3.30

1.80

1.50

0.8

V > 2.7V; V −V > 1 V at I

≤ 150 mA

≤ 50mA

OUT

Output voltage

V > 1.8 V; V −V > 1 V at I

(FB)

Feedback voltage

= 0 mA to 150 mA,

= 0 mA to 250 mA,

= 47 µF

= 10 µF

= 47 µF

−4%

TPS60500

TPS60502

TPS60503

Tolerance of output voltage

Output voltage ripple at OUT

= 150 mA, V = 1.5 V

Quiescent current (no-load input current)

Thermal shutdown temperature

Shutdown supply current

= 0 mA

µA

(SD)

150

0.05

800

°C

µA

kHz

= V

0.5

1200

O(SD)

(OSC)

(EN)

Internal switching frequency

EN input low voltage

600

0.3 x V

EN input high voltage

0.7 x V

EN input leakage current

= 0 V or V

0.01

0.1

µA

lkg(SD)

lkg(FB)

FB input leakage current

TPS60500

Maximum resistance of the

external voltage divider

TPS60500 R1 + R2 at FB pin

MΩ

(max)

Short circuit current (start-up current)

Output current limit

V = 6.5V,

= 0 V

100

300

500

> 0.6 V

No load start-up time

µs

electrical characteristics for power good comparator of devices TPS6050x at T = −40°C to 85°C,

V = 5 V and V

= GND (unless otherwise noted)

(EN)

PARAMETER

TEST CONDITIONS

See Note 2

MIN

TYP

V – 2%

MAX

UNIT

(PG)

Power good trip voltage

ramping positive

ramping negative

100

200

100

0.3

0.1

µs

d,r

Power good delay time

d,f

Power good output voltage low

Power good leakage current

= 0 V,

= 1 mA

(PG)

= 3.3 V,

(PG)

= 3.3 V

0.01

µA

lkg

NOTE 2:

is the output voltage at the maximum load current. V is not a JEDEC symbol.

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SLVS391B − OCTOBER 2001 − REVISED FEBRUARY 2002

functional block diagram TPS6050x

VIN

2/3

Skip

800 KHz

CLK

Gear

1/2

Logic

Driver

1/3

C1F

C2F

ON/OFF

OUT

Thermal and

Short-Circuit

Current Limit

Start−up

OUT

Skip

V_REG

Regulator

Amplifier

Bandgap

0.8 V

TYPICAL CHARACTERISTICS

Table of Graphs

FIGURE

1−4

5−8

9−12

Minimum input voltage

Efficiency

vs Output current

vs Input voltage

vs Output current

vs Input voltage

vs Output current

vs Time

Output voltage

Quiescent current

Efficiency

14−17

Output voltage (ripple)

Line transient response

Load transient response

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SLVS391B − OCTOBER 2001 − REVISED FEBRUARY 2002

TYPICAL CHARACTERISTICS

TPS60503

MINIMUM INPUT VOLTAGE

TPS60502

MINIMUM INPUT VOLTAGE

TPS60501

MINIMUM INPUT VOLTAGE

OUTPUT CURRENT

3.40

3.20

3.6

3.4

3.2

4.3

4.2

4.1

Threshold:

nom −3% = 1.455 V

Threshold:

nom −3% = 3.201 V

Threshold:

nom −3% = 1.746 V

−40°C

= 85°C

2.80

2.60

2.40

2.20

25°C

= 25°C

3.9

3.8

3.7

3.6

3.5

2.8

2.6

2.4

2.2

−40°C

25°C

85°C

= −40°C

85°C

1.80

1.60

3.4

3.3

1.8

100

150

200

250

6.5

100

150

200

250

100

150

200

250

− Output Current − mA

Figure 1

Figure 2

Figure 3

TPS60500

TPS60503

EFFICIENCY

TPS60502

EFFICIENCY

MINIMUM INPUT VOLTAGE

OUTPUT CURRENT

INPUT VOLTAGE

2.6

2.5

2.4

2.3

2.2

2.1

100

10 mA

100 mA

Threshold:

nom −3% = 0.776 V

150 mA

200 mA

85°C

200 mA

250 mA

10 mA

150 mA

25°C

250 mA

100 mA

1.9

1.8

1.7

1.6

1.5

1.4

−40°C

100

150

200

2.5

3.5

4.5

5.5

6.5

2.5

3.5

4.5

5.5

6.5

− Output Current − mA

V − Input Voltage − V

Figure 4

Figure 5

Figure 6

TPS60500

EFFICIENCY

TPS60503

TPS60501

EFFICIENCY

OUTPUT VOLTAGE

OUTPUT CURRENT

INPUT VOLTAGE

100

1.55

1.54

1.53

1.52

1.51

1.5

100

= 10 µF,

10 mA

200 mA

250 mA

150 mA

200 mA

V = 3.6 V

V = 5 V

100 mA

150 mA

250 mA

1.49

1.48

1.47

100 mA

50 mA

V = 3.3 V

Adjusted to 0.8 V,

= 47 µF,

1.46

1.45

1.5

2.5

3.5

4.5

5.5 6 6.5

0.1

100

1000

3.5

4.5

5.5

V − Input Voltage − V

− Output Current − mA

V − Input Voltage − V

Figure 7

Figure 8

Figure 9

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SLVS391B − OCTOBER 2001 − REVISED FEBRUARY 2002

TYPICAL CHARACTERISTICS

TPS60502

OUTPUT VOLTAGE

TPS60500

OUTPUT VOLTAGE

TPS60501

OUTPUT VOLTAGE

OUTPUT CURRENT

1.84

1.83

1.82

1.81

1.80

1.79

1.78

1.77

1.76

3.36

3.34

3.32

3.30

3.28

3.26

3.24

0.86

0.85

0.84

0.83

0.82

0.81

0.80

0.79

0.78

= 10 µF,

V = 5 V

Adjusted to 0.8 V

= 10 µF

V = 5 V

V = 3.6 V

V = 5 V

V = 3.3 V

V = 2.4 V

V = 3.3 V

3.22

3.20

1.75

1.74

0.77

0.76

0.1

100

1000

0.1

100

1000

0.1

100

1000

− Output Current − mA

Figure 10

Figure 11

Figure 12

TPS60503

EFFICIENCY

TPS60502

EFFICIENCY

QUIESCENT CURRENT

INPUT VOLTAGE

OUTPUT CURRENT

V = 3.3 V

V = 3.6 V

V = 3.3 V

V = 5 V

= 85°C

= 25°C

V = 5 V

V = 3.6 V

= −40°C

1.8 2.3 2.8 3.3 3.8 4.3 4.8 5.3 5.8 6.3

0.1

100

1000

0.1

100

1000

V − Input Voltage − V

− Output Current − mA

Figure 13

Figure 14

Figure 15

TPS60501

TPS60500

EFFICIENCY

OUTPUT CURRENT

100

V = 3.3 V

V = 5 V

V = 2.4 V

V = 3.6 V

V = 5 V

Adjusted to 0.8 V

100

0.1

100

1000

0.1

1000

− Output Current − mA

Figure 16

Figure 17

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SLVS391B − OCTOBER 2001 − REVISED FEBRUARY 2002

TYPICAL CHARACTERISTICS

OUTPUT VOLTAGE (RIPPLE)

LINE TRANSIENT RESPONSE

TIME

LOAD TRANSIENT RESPONSE

= 10 µF,

= 50 mA

= 10 µF,

C = 10 µF,

V = 3.3 V

= 1.5 V

= 25°C

= 1.5 V

= 100 mA

= 25°C

50 mV/division

= 25°C

50 mV/division

= 15 mA to 135 mA to 15 mA

V = 2.5 V to 3.5 V to 2.5 V

10 mV/division

1 V/division

100 mA/division

10 µs / division

1 µs / division

Figure 18

Figure 19

Figure 20

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SLVS391B − OCTOBER 2001 − REVISED FEBRUARY 2002

PRINCIPLES OF OPERATION

The TPS6050x charge pumps provide a regulated output voltage in the range of 0.8 V to 3.3 V from an input

voltage of 1.8 V to 6.5 V. The devices use switched capacitor fractional conversion to achieve high efficiency

over the entire input and output voltage range. Regulation is achieved by sensing the output voltage and

enabling the internal switches as needed to maintain the selected output voltage. This skip-mode regulation is

used over a load range from 0 mA to 150 mA. At a higher output current, the device works in a linear regulation

mode.

The TPS6050x circuits consist of an oscillator, a voltage reference, an internal resistive feedback circuit (fixed

voltage version only), an error amplifier, two charge pump stages with MOSFET switches, a shutdown/start-up

circuit, and a control circuit.

short-circuit current limit and thermal protection

When the output voltage is lower than 0.6 V, the output current is limited to 300 mA typically. The device also

has a thermal protection which reduces the output current when the temperature of the chip exceeds 150°C.

The output current declines to 0 mA when the chip temperature rises to 160°C.

enable

Driving EN high disables the converter. This disables all internal circuits, reducing input current to only 0.05µA.

Leakage current drawn from the output pin OUT is a maximum of 1 µA. The device exits shutdown once EN

is set low (see start up procedure described below). The typical no-load start-up time is 80 µs. When the device

is disabled, the load is isolated from the input, an important feature in battery-operated products because it

extends the battery shelf life.

start-up procedure

The device is enabled when EN is set from logic high to logic low. The charge pump stages immediately start

switching to transfer energy to the output. In start-up until the output voltage has reached 0.6 V, the input current

is limited to 300 mA typically.

power good detector

The power good (PG) output is an open-drain output on all TPS6050x devices. The PG output pulls low when

the output is out of regulation. When the output rises to within 97% of regulation, the power good output goes

high. In shutdown, power good is pulled low. In normal operation, an external pullup resistor is typically used

to connect the PG pin to V or V . If the PG output is not used, it should remain unconnected.

(NOM)

d,r

d,f

d,r

Figure 21. Power Good Timing Diagram

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ꢀ ꢁ ꢂꢃ ꢄ ꢅ ꢄ ꢈꢆ ꢀ ꢁꢂ ꢃ ꢄ ꢅ ꢄ ꢉ

SLVS391B − OCTOBER 2001 − REVISED FEBRUARY 2002

PRINCIPLES OF OPERATION

The TPS6050x devices use fractional conversion to achieve high efficiency over a wide input and output voltage

range. Depending on the input to output voltage ratio and output current, internal circuitry switches between an

LDO mode, a 2/3x mode, a 0.5x mode, and a 1/3x mode.

LDO conversion mode

In the LDO mode, the flying capacitors are no longer used for transferring energy. The switches 1, 2, 5, and 6

are closed and connect the input directly with the output. This mode is automatically selected if the input to output

voltage ratio does not allow the use of another conversion mode with higher efficiency. In LDO mode, the

regulation is done by switching off MOSFET 2 and 6 until the output current reaches the linear-skip current (150

mA typ). At a higher output current, the output voltage is regulated by controlling the resistance of the switch.

The minimum input to output voltage difference required for regulation is 1 V.

VIN

SW1

SW3

C1F

SW5

SW9

SW7

C2F

SW2

SW4

SW6

SW8

OUT

Figure 22. LDO Conversion Mode

2/3x conversion mode

In the first cycle, the two flying capacitors are connected in parallel and are charged up in series with the output

capacitor. In the second cycle, the flying capacitors are connected in series. This mode provides higher

efficiency than the LDO mode because the current into VIN is only 2/3 of the output current. The mode is

automatically selected if the input voltage is higher than 3/2 of the selected output voltage.

VIN

SW1

VIN

SW3

C1F

SW5

SW9

SW7

C2F

SW1

SW3

C1F

SW5

SW9

SW7

C2F

SW2

SW4

SW6

SW8

SW2

SW4

SW6

SW8

OUT

Phase 1: Charging of Flying Caps

Phase 2: Discharging of Flying Caps

Figure 23. 2/3x Conversion Mode

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SLVS391B − OCTOBER 2001 − REVISED FEBRUARY 2002

PRINCIPLES OF OPERATION

0.5x conversion mode

This conversion mode is internally selected if the input to output voltage ratio is greater than two (e.g. 3.6 V to

1.5 V conversion). In the 0.5x mode, the flying capacitors and the switches always work in parallel, which

reduces the resistance of the circuit compared to the other modes. In the first cycle, the flying capacitors are

charged in series with the output capacitors. In the second cycle, the flying capacitors are connected in parallel

with the output capacitor, which discharges the flying capacitors.

VIN

SW1

VIN

SW3

C1F

SW5

SW9

SW7

C2F

SW1

SW3

C1F

SW5

SW9

SW7

C2F

SW2

SW4

SW6

SW8

SW2

SW4

SW6

SW8

OUT

Phase 1: Charging of Flying Caps

Phase 2: Discharging of Flying Caps

Figure 24. 0.5x Conversion Mode

1/3x conversion mode

This mode was implemented to provide high efficiency even with an input to output voltage ratio greater than

three (e.g. 5 V to 1.5 V conversion). In the first cycle, the two flying capacitors are charged in series with the

output capacitor. In the next step, the flying capacitors which are charged to VIN/3, are connected in parallel

to the output capacitor.

VIN

SW1

VIN

SW1

SW5

SW3

C1F

SW7

C2F

SW3

C1F

SW5

SW9

SW7

C2F

SW9

SW2

SW4

SW8

SW2

SW4

SW6

SW8

SW6

OUT

Phase 1: Charging of Flying Caps

Phase 2: Discharging of Flying Caps

Figure 25. 1/3x Conversion Mode

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SLVS391B − OCTOBER 2001 − REVISED FEBRUARY 2002

DESIGN PROCEDURE

capacitor selection

Designed specifically for space-critical battery-powered applications, the complete converter requires only four

external capacitors. The capacitor values are closely linked to the required output current, output noise, and

ripple requirements. The input capacitor improves system efficiency by reducing the input impedance, and it

also stabilizes the input current. The value of the output capacitor, C , influences the stability of the voltage

regulator. The minimum required capacitance for C is 4.7 µF. Depending on the maximum allowed output ripple

voltage and load current, larger values can be chosen. For an output current greater than 150 mA, a minimum

output capacitor of 22 µF is required. Table 1 shows ceramic capacitor values recommended for low output

voltage ripple.

Table 1. Recommended Capacitors

MANUFACTURER

PART NUMBER

SIZE

CAPACITANCE

TYPE

LMK212BJ105KG

LMK212BJ225MG

EMK316BJ225KL

LMK316BJ475KL

JMK316BJ106KL

0805

1206

1 µF

Ceramic

2.2 µF

4.7 µF

10 µF

Taiyo Yuden

C2012X5R1C105M

C2012X5R1A225M

C2012X5R0J106M

0805

1 µF

2.2 µF

10 µF/6.3 V

Ceramic

TDK

Table 2 contains a list of manufacturers of ceramic capacitors. Ceramic capacitors provide the lowest output

voltage ripple because they typically have the lowest ESR-rating.

Table 2. Recommended Capacitor Manufacturers

MANUFACTURER

Taiyo Yuden

TDK

CAPACITOR TYPE

X7R/X5R ceramic

INTERNET

www.t−yuden.com

www.component.tdk.com

www.vishay.com

Vishay

Kemet

www.kemet.com

APPLICATION INFORMATION

typical application circuit for fixed voltage and adjustable voltage versions

Figure 26 shows the typical operation circuit. The TPS60501 to TPS60503 devices use an internal resistor

divider for sensing the output voltage. The FB pin must be connected externally with the output. For maximum

output current and best performance, 4 ceramic capacitors are recommended. For lower currents or higher

allowed output voltage ripple, other capacitors can also be used. It is recommended that the output capacitor

has a minimum value of 4.7 µF. This value is necessary to maintain a stable operation of the system. Flying

capacitors lower than 1 µF can be used, but this decreases the maximum output power. This means that the

device works in linear mode with lower output currents. The device works in the linear mode for an output current

of greater than 150 mA. With an output current greater than 150 mA, an output capacitor of ≥22 µF must be used.

Figure 26 shows that two 10-µF capacitors can also be used in parallel.

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SLVS391B − OCTOBER 2001 − REVISED FEBRUARY 2002

APPLICATION INFORMATION

C1F

C2F

C1F

C2F

1 µF

C1F− C1F+ C2F−C2F+

C1F− C1F+ C2F− C2F+

max 150 mA

1.5 V

max 150 mA

INPUT

1.8 V to 6.5 V

OUT

10 µF

2.5 V to 6.5 V

VIN

10 pF

10 µF

TPS60503

TPS60500

2.2 µF

OFF/ON

GND

_{R1 + R2}ǒ Ǔ_–R2

(

)

R1 ) R2

Nominal Output Voltage Equation

Possible E24 Resistor Combination

R1 = 100 kΩ, R2 = 200 kΩ (1.20 V)

R1 = 160 kΩ, R2 = 180 kΩ (1.51 V)

Any

VFB

1.2 V

1.5 V

1.6 V

1.8 V

2.5 V

R1 = 0.5R2

R1 = 0.875R2

R1 = R2

VFB = 0.8 V

R1 = 1.25R2

R1 = 2.125R2

R1 = 150 kΩ, R2 = 120 kΩ (1.80 V)

R1 = 510 kΩ, R2 = 240 kΩ (2.50 V)

R1 = 470 kΩ, R2 = 220 kΩ (2.51 V)

C1F

C2F

1 µF

C1F− C1F+ C2F− C2F+

max 250 mA

INPUT

3.15 V to 6.5 V

OUT

1.5 V

VIN

out1

10 µF

out2

10 µF

TPS60503

4.7 µF

OFF/ON

GND

Power supply with 1,4 mm maximum height for 250-mA output current

Figure 26. Typical Operating Circuit

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ꢀ ꢁ ꢂꢃ ꢄ ꢅ ꢄ ꢈꢆ ꢀ ꢁꢂ ꢃ ꢄ ꢅ ꢄ ꢉ

SLVS391B − OCTOBER 2001 − REVISED FEBRUARY 2002

APPLICATION INFORMATION

DSP supply with sequencing

This application shows a power supply for a typical DSP. DSPs usually have core voltages in the 1-V to 2.5-V

range, whereas the voltage at the I/O-pins (I/O voltage) is typically 3.3 V to interface with external logic and

converters. Therefore, a power supply with two output voltages is required. The application works with an input

voltage in the range of 3.5 V to 6.5 V. The maximum output current is 150 mA on each output.

The supply is enabled by pulling the enable pin (EN of the TPS60503) to GND. The step-down charge pump

starts and its power good (PG) output goes high. This enables the LDO which powers the I/O lines and generates

a reset signal for the DSP. Figure 27 shows the timing diagram of the start-up/shutdown procedure.

I/O

(NOM)

TPS77133

VIN

OUT

(CORE)

47 kΩ

10 MΩ 1 MΩ

(NOM)

RESET

GND

3.3 V

I/O

‡

10 µF†

TPS60503

RESET

VIN

47 µF

1 MΩ

OUT

1.5 V

(CORE)

C1F+

10 µF†

ENABLE

GND

C1F−

1 µF

C2F+

C2F−

GND

†

‡

Recommended value for stability, DSP may require higher capacitance.

RS is the RESET output of the TPS77133.

Figure 27. DSP Supply With Sequencing

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ꢀ ꢁꢂꢃ ꢄ ꢅ ꢄ ꢈ ꢆ ꢀꢁ ꢂ ꢃꢄ ꢅꢄ ꢉ

SLVS391B − OCTOBER 2001 − REVISED FEBRUARY 2002

APPLICATION INFORMATION

LC-post filter

If the output voltage ripple of the stepdown charge pump is to high, an LC post filter can be used.

C1F

C2F

1 µF

C1F− C1F+ C2F− C2F+

(P)

max 150 mA

INPUT

OUT

2.5 V to 6.5 V

10 µF

VIN

P(out)

(P)

2.2 µF

TPS60503

OFF/ON

GND

Figure 28. LC-Post Filter

Table 3. Measurement Results on Different C , C , L Combinations; BW = 500 MHz

(fly) (P) (P)

[µF]

(P)

(XF)

[µF]

TYPICAL

[V]

[µH]

(P)

[µF]

P(Out)

[mV]

O(RMS)

[mV]

[mA]

[V]

CERAMIC CERAMIC CERAMIC

CERAMIC

0.1 (X7R)

2.2

4.7

0.22

4.7

—

3.3

1.5

150

250

100

—

2 x 10

—

0.1

power supply with dynamic voltage scaling

Dynamic voltage scaling of the core can be used to reduce power consumption of a digital signal processor

(DSP). During the periods, in which the maximum DSP performance is not required, the core voltage can be

reduced when the DSP operates at a lower clock-rate. This idea is called runtime power control (RPC) and is

supported by modern DSPs. RPC extends battery-life time in handheld applications, like MP3 players, digital

cameras, PDA.

The supply of DSPs is separated into I/O interface and core supply. Interface is mostly powered by a 3.3-V

system supply, whereas core supply achieves voltages far below 1.5 V. The TPS60500 is powered by the 3.3-V

system supply. The DSP itself selects the applied core voltage.

The core voltage is switched between 1.5 V and 1.1 V by changing the feedback resistor network. A MOSFET

modifies the voltage divider at the feedback (FB) pin by switching a resistor. In this application, a general

purpose MOSFET BSS138 is used with a V

resistor network consists of R2, R3 and R4. C is the fast forward capacitor for improved line regulation.

of 1.6 V. A DSP 3.3-V I/O port drives the gate. The feedback

GS(th)

(ff)

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ꢀ ꢁ ꢂꢃ ꢄ ꢅ ꢄ ꢈꢆ ꢀ ꢁꢂ ꢃ ꢄ ꢅ ꢄ ꢉ

SLVS391B − OCTOBER 2001 − REVISED FEBRUARY 2002

APPLICATION INFORMATION

power supply with dynamic voltage scaling (continued)

General requirements for the application:

Output voltage1 (DSP core):

Output voltage 2 (DSP core):

Input voltage:

1.5 V 0.08 V

1.1 V +0.1 V –0.05 V

3 V to 3.3 V

Output current:

150 mA (10R load)

C1F

C2F

1 µF

C1F− C1F+ C2F− C2F+

1.5 V / 1.1 V

150 mA

Input

3.3 V

OUT

10 µF

(ff)

150 pF

VIN

2.2 µF

TPS60500

BSS138

DVS in

OFF/ON

330 kΩ

GND

470 pF

Figure 29. Dynamic Voltage Scaling Application

To keep current through the adjustment resistor network as low as possible, the resistors are calculated to:

adjusted by R2 and R3

(1)

out1

= 1.1 V,

out1

R3 +

R2 = 180 kΩ,

= 0.80 V,

out1

ref

→R3 = 470 kΩ

(2)

(3)

adjusted by R2 and Rx = R3||R4

out2

= 1.5 V,

out2

^{Rx +}ǒ_V

_FBǓ

→Rx = 206 kΩ

* V

out2

→R4 = 360 kΩ

)

³ R4 +

R3 R4

Rx R3

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ꢀ ꢁꢂꢃ ꢄ ꢅ ꢄ ꢄ ꢆ ꢀꢁ ꢂ ꢃꢄ ꢅꢄ ꢇ

ꢀ ꢁꢂꢃ ꢄ ꢅ ꢄ ꢈ ꢆ ꢀꢁ ꢂ ꢃꢄ ꢅꢄ ꢉ

SLVS391B − OCTOBER 2001 − REVISED FEBRUARY 2002

APPLICATION INFORMATION

internet audio power supply

The input voltage from a single or dual NiCd, NiMH or alkaline cell is boosted to 3.3 V. This voltage is used as

system supply for the application and as an input voltage for the step-down charge pump which is used to

provide the core voltage for a DSP.

10 µH

10 µF

= 3.3 V

≥ 100 mA

VOUT

LBO

VBAT

LBI

22 µF

Low Battery

Output

TPS61010

Single or dual

NiCd,

(C)

NiMH or

ADEN

COMP

Alkaline Cell

GND

100 kΩ

10 nF

10 pF

C1F

1 µF

C2F

1 µF

C1F− C1F+ C2F− C2F+

OUT

= 1.5 V

≤ 150 mA

10 µF

VIN

2.2 µF

TPS60503

OFF/ON

Power Good

Output

GND

Figure 30. Internet Audio Power Supply

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ꢀ ꢁ ꢂꢃ ꢄ ꢅ ꢄ ꢈꢆ ꢀ ꢁꢂ ꢃ ꢄ ꢅ ꢄ ꢉ

SLVS391B − OCTOBER 2001 − REVISED FEBRUARY 2002

APPLICATION INFORMATION

layout and board space

All capacitors should be soldered as close as possible to the IC. A PCB layout proposal for a two-layer board

is shown in Figure 31. Care has been taken to connect all capacitors as close as possible to the circuit to achieve

optimized output voltage ripple performance.

Figure 31. Recommended PCB Layout for TPS6050x (top layer)

Figure 32. Recommended PCB Layout for TPS6050x (bottom layer)

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PACKAGE OPTION ADDENDUM

www.ti.com

19-Nov-2012

PACKAGING INFORMATION

Orderable Device

TPS60500DGS

Status Package Type Package Pins Package Qty

Eco Plan Lead/Ball Finish

MSL Peak Temp

Samples

Drawing

(1)

(2)

(3)

(Requires Login)

ACTIVE

VSSOP

DGS

Green (RoHS

& no Sb/Br)

CU NIPDAU Level-1-260C-UNLIM

TPS60500DGSG4

TPS60500DGSR

Green (RoHS

& no Sb/Br)

2500

Green (RoHS

& no Sb/Br)

TPS60500DGSRG4

TPS60501DGS

Green (RoHS

& no Sb/Br)

Green (RoHS

& no Sb/Br)

TPS60501DGSG4

TPS60501DGSR

Green (RoHS

& no Sb/Br)

2500

Green (RoHS

& no Sb/Br)

TPS60501DGSRG4

TPS60502DGS

Green (RoHS

& no Sb/Br)

Green (RoHS

& no Sb/Br)

TPS60502DGSG4

TPS60502DGSR

Green (RoHS

& no Sb/Br)

2500

Green (RoHS

& no Sb/Br)

TPS60502DGSRG4

TPS60503DGS

Green (RoHS

& no Sb/Br)

Green (RoHS

& no Sb/Br)

TPS60503DGSG4

Green (RoHS

& no Sb/Br)

⁽¹⁾The marketing status values are defined as follows:

ACTIVE: Product device recommended for new designs.

LIFEBUY: TI has announced that the device will be discontinued, and a lifetime-buy period is in effect.

NRND: Not recommended for new designs. Device is in production to support existing customers, but TI does not recommend using this part in a new design.

PREVIEW: Device has been announced but is not in production. Samples may or may not be available.

OBSOLETE: TI has discontinued the production of the device.

Addendum-Page 1

PACKAGE OPTION ADDENDUM

www.ti.com

19-Nov-2012

⁽²⁾Eco Plan - The planned eco-friendly classification: Pb-Free (RoHS), Pb-Free (RoHS Exempt), or Green (RoHS & no Sb/Br) - please check http://www.ti.com/productcontent for the latest availability

information and additional product content details.

TBD: The Pb-Free/Green conversion plan has not been defined.

Pb-Free (RoHS): TI's terms "Lead-Free" or "Pb-Free" mean semiconductor products that are compatible with the current RoHS requirements for all 6 substances, including the requirement that

lead not exceed 0.1% by weight in homogeneous materials. Where designed to be soldered at high temperatures, TI Pb-Free products are suitable for use in specified lead-free processes.

Pb-Free (RoHS Exempt): This component has a RoHS exemption for either 1) lead-based flip-chip solder bumps used between the die and package, or 2) lead-based die adhesive used between

the die and leadframe. The component is otherwise considered Pb-Free (RoHS compatible) as defined above.

Green (RoHS & no Sb/Br): TI defines "Green" to mean Pb-Free (RoHS compatible), and free of Bromine (Br) and Antimony (Sb) based flame retardants (Br or Sb do not exceed 0.1% by weight

in homogeneous material)

⁽³⁾MSL, Peak Temp. -- The Moisture Sensitivity Level rating according to the JEDEC industry standard classifications, and peak solder temperature.

Important Information and Disclaimer:The information provided on this page represents TI's knowledge and belief as of the date that it is provided. TI bases its knowledge and belief on information

provided by third parties, and makes no representation or warranty as to the accuracy of such information. Efforts are underway to better integrate information from third parties. TI has taken and

continues to take reasonable steps to provide representative and accurate information but may not have conducted destructive testing or chemical analysis on incoming materials and chemicals.

TI and TI suppliers consider certain information to be proprietary, and thus CAS numbers and other limited information may not be available for release.

In no event shall TI's liability arising out of such information exceed the total purchase price of the TI part(s) at issue in this document sold by TI to Customer on an annual basis.

Addendum-Page 2

PACKAGE MATERIALS INFORMATION

www.ti.com

19-Nov-2012

TAPE AND REEL INFORMATION

*All dimensions are nominal

Device

Package Package Pins

Type Drawing

SPQ

Reel

Pin1

Diameter Width (mm) (mm) (mm) (mm) (mm) Quadrant

(mm) W1 (mm)

TPS60500DGSR

TPS60501DGSR

TPS60502DGSR

VSSOP

DGS

2500

330.0

12.4

5.3

3.4

1.4

8.0

12.0

Pack Materials-Page 1

PACKAGE MATERIALS INFORMATION

www.ti.com

19-Nov-2012

*All dimensions are nominal

Device

Package Type Package Drawing Pins

SPQ

Length (mm) Width (mm) Height (mm)

TPS60500DGSR

TPS60501DGSR

TPS60502DGSR

VSSOP

DGS

2500

340.5

338.1

20.6

Pack Materials-Page 2

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TPS60502DGSR [TI]

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