TEXAS INSTRUMENTS TPS61020, TPS61024, TPS61025, TPS61027, TPS61028 Technical data

(3,25 mm x 3,25 mm)

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SW

C1

10 µF

L1

6.8 µH

R1

R2

VBAT

VOUT

FB

C2

2.2 µFC347 µF

LBO

PGND

LBI

PS

EN

GND

TPS61020

V

O

3.3 V Up To
200 mA

Low Battery
Output

R3

R4

R5

0.9-V To

6.5-V Input

TPS61020, TPS61024

TPS61025, TPS61027, TPS61028

SLVS451C – SEPTEMBER 2003 – REVISED JUNE 2005

96% EFFICIENT SYNCHRONOUS BOOST CONVERTER WITH 1.5-A SWITCH

FEATURES DESCRIPTION

• 96% Efficient Synchronous Boost Converter

– 200-mA Output Current From 0.9-V Input
– 500-mA Output Current From 1.8-V Input

• Output Voltage Remains Regulated When

Input Voltage Exceeds Nominal Output
Voltage

• Device Quiescent Current: 25 µA (Typ)

• Input Voltage Range: 0.9 V to 6.5 V

• Fixed and Adjustable Output Voltage Options

Up to 5.5 V

• Power Save Mode for Improved Efficiency at

Low Output Power

• Low Battery Comparator

• Low EMI-Converter (Integrated Antiringing

Switch)

• Load Disconnect During Shutdown

• Over-Temperature Protection

• Small 3 mm × 3 mm QFN-10 Package

APPLICATIONS

• All One-Cell, Two-Cell and Three-Cell Alkaline,

NiCd or NiMH or Single-Cell Li Battery
Powered Products

• Portable Audio Players tion mode. The device is packaged in a 10-pin QFN

• PDAs

• Cellular Phones

• Personal Medical Products

• Camera White LED Flash Light

The TPS6102x devices provide a power supply
solution for products powered by either a one-cell,
two-cell, or three-cell alkaline, NiCd or NiMH, or
one-cell Li-Ion or Li-polymer battery. Output currents
can go as high as 200 mA while using a single-cell
alkaline, and discharge it down to 0.9 V. It can also
be used for generating 5 V at 500 mA from a 3.3-V
rail or a Li-Ion battery. The boost converter is based
on a fixed frequency, pulse-width-modulation (PWM)
controller using a synchronous rectifier to obtain
maximum efficiency. At low load currents the con­verter enters the Power Save mode to maintain a
high efficiency over a wide load current range. The
Power Save mode can be disabled, forcing the
converter to operate at a fixed switching frequency.
The maximum peak current in the boost switch is
limited to a value of 1500 mA.

The TPS6102x devices keep the output voltage
regulated even when the input voltage exceeds the
nominal output voltage. The output voltage can be
programmed by an external resistor divider, or is
fixed internally on the chip. The converter can be
disabled to minimize battery drain. During shutdown,
the load is completely disconnected from the battery.
A low-EMI mode is implemented to reduce ringing
and, in effect, lower radiated electromagnetic energy
when the converter enters the discontinuous conduc-

PowerPAD™ package measuring 3 mm x 3 mm
(DRC).

PowerPAD is a trademark of Texas Instruments.

PRODUCTION DATA information is current as of publication date.
Products conform to specifications per the terms of the Texas
Instruments standard warranty. Production processing does not
necessarily include testing of all parameters.

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.

Copyright © 2003–2005, Texas Instruments Incorporated

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TPS61020, TPS61024
TPS61025, TPS61027, TPS61028

SLVS451C – SEPTEMBER 2003 – REVISED JUNE 2005

These devices have limited built-in ESD protection. The leads should be shorted together or the device
placed in conductive foam during storage or handling to prevent electrostatic damage to the MOS gates.

AVAILABLE OUTPUT VOLTAGE OPTIONS

T

A

-40 ° C to 85 ° C 3.0 V 1500 mA BDS 10-Pin QFN TPS61024DRC

(1) Contact the factory to check availability of other fixed output voltage versions.
(2) The DRC package is available taped and reeled. Add R suffix to device type (e.g., TPS61020DRCR) to order quantities of 3000 devices

per reel. Add a T suffix to the device type (i.e., TPS61020DRCT) to order quantities of 250 devices per reel.

OUTPUT VOLTAGE NOMINAL SWITCH CUR- PACKAGE

DC/DC RENT LIMIT MARKING

Adjustable 1500 mA BDR TPS61020DRC
Adjustable 800 mA BNE TPS61028DRC

3.3 V 1500 mA BDT TPS61025DRC
5 V 1500 mA BDU TPS61027DRC

(1)

PACKAGE PART NUMBER

ABSOLUTE MAXIMUM RATINGS

over operating free-air temperature range (unless otherwise noted)

Input voltage range on SW, VOUT, LBO, VBAT, PS, EN, FB, LBI –0.3 V to 7 V
Operating virtual junction temperature range, T
Storage temperature range T

(1) 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.

stg

J

(1)

TPS6102x

–40 ° C to 150 ° C
–65 ° C to 150 ° C

(2)

DISSIPATION RATINGS TABLE

PACKAGE

DRC 48.7 ° C/W 2054 mW 21 mW/ ° C

THERMAL RESISTANCE POWER RATING DERATING FACTOR ABOVE

RECOMMENDED OPERATING CONDITIONS

Supply voltage at VBAT, V
Operating free air temperature range, T
Operating virtual junction temperature range, T

I

A

Θ

JA

J

TA≤ 25 ° C TA= 25 ° C

MIN NOM MAX UNIT

0.9 6.5 V
–40 85 ° C
–40 125 ° C

2

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TPS61020, TPS61024

TPS61025, TPS61027, TPS61028

SLVS451C – SEPTEMBER 2003 – REVISED JUNE 2005

ELECTRICAL CHARACTERISTICS

over recommended free-air temperature range and over recommended input voltage range (typical at an ambient temperature
range of 25 ° C) (unless otherwise noted)

DC/DC STAGE

PARAMETER TEST CONDITIONS MIN TYP MAX UNIT

V

I

V

O

V

FB

f Oscillator frequency 480 600 720 kHz
I

SW

I

SW

Minimum input voltage for start-up RL= 120 Ω 0.9 1.2
Input voltage range, after start-up 0.9 6.5
TPS61020 and TPS61028 output

voltage range
TPS61020 and TPS61028 feedback

voltage

Switch current limit (TPS61020,
TPS61024, TPS61025, TPS61027)

VOUT= 3.3 V 1200 1500 1800 mA

1.8 5.5 V

490 500 510 mV

Switch current limit (TPS61028) VOUT= 3.3 V 800 mA
Start-up current limit 0.4 x I

SW

SWN switch on resistance VOUT= 3.3 V 260 m Ω
SWP switch on resistance VOUT= 3.3 V 290 m Ω
Total accuracy (including line and

load regulation)

± 3%

Line regulation 0.6%
Load regulation 0.6%

Quiescent current

VBAT 1 3 µA
VOUT 25 45 µA

Shutdown current V

IO= 0 mA, V
VOUT = 3.3 V, TA= 25 ° C

= 0 V, VBAT = 1.2 V, TA= 25 ° C 0.1 1 µA

EN

= VBAT = 1.2 V,

EN

V

mA

CONTROL STAGE

V

UVLO

V

IL

V

OL

V

lkg

V

IL

V

IH

PARAMETER TEST CONDITIONS MIN TYP MAX UNIT

Under voltage lockout threshold V
LBI voltage threshold V

voltage decreasing 0.8 V

LBI

voltage decreasing 490 500 510 mV

LBI

LBI input hysteresis 10 mV
LBI input current EN = VBAT or GND 0.01 0.1 µA
LBO output low voltage VO= 3.3 V, IOI= 100 µA 0.04 0.4 V
LBO output leakage current V

= 7 V 0.01 0.1 µA

LBO

EN, PS input low voltage 0.2 × VBAT V
EN, PS input high voltage 0.8 × VBAT V
EN, PS input current Clamped on GND or VBAT 0.01 0.1 µA
Overtemperature protection 140 ° C
Overtemperature hysteresis 20 ° C

3

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FB

LBO

GND

VBAT

SW

VOUT

LBI

PS

EN

PGND

DRC PACKAGE

(TOP VIEW)

TPS61020, TPS61024
TPS61025, TPS61027, TPS61028

SLVS451C – SEPTEMBER 2003 – REVISED JUNE 2005

PIN ASSIGNMENTS

Terminal Functions

TERMINAL

NAME NO.

EN 1 I Enable input. (1/VBAT enabled, 0/GND disabled)
FB 3 I Voltage feedback of adjustable versions
GND 5 Control / logic ground
LBI 7 I Low battery comparator input (comparator enabled with EN), may not be left floating, should be connected to

LBO 4 O Low battery comparator output (open drain)
PS 8 I Enable/disable power save mode (1/VBAT disabled, 0/GND enabled)
SW 9 I Boost and rectifying switch input
PGND 10 Power ground
VBAT 6 I Supply voltage
VOUT 2 O Boost converter output
PowerPAD™ Must be soldered to achieve appropriate power dissipation. Should be connected to PGND.

I/O DESCRIPTION

GND or VBAT if comparator is not used

4

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Anti-

Ringing

Gate

Control

PGND

Regulator

Error

Amplifier

PGND

Control Logic

Oscillator

Temperature

Control

VOUT

PGND

FB

SW

VBAT

EN
PS

GND

LBI

_
+

_

+

Backgate

Control

V

max

Control

VOUT

10 kΩ

20 pF

_

+

V

ref

= 0.5 V

GND

LDO

Low Battery
Comparator

_

+

V

ref

= 0.5 V

GND

FUNCTIONAL BLOCK DIAGRAM (TPS61020, TPS61028)

TPS61020, TPS61024

TPS61025, TPS61027, TPS61028

SLVS451C – SEPTEMBER 2003 – REVISED JUNE 2005

5

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SW

C1

10 µF

Power

Supply

L1

6.8 µH

R1

R2

VBAT

VOUT

FB

C2

2.2 µFC347 µF

LBO

PGND

LBI

PS

EN

GND

TPS6102x

List of Components:
U1 = TPS6102xDRC
L1 = EPCOS B82462−G4682
C1, C2 = X7R/X5R Ceramic
C3 = Low ESR Tantalum

V

CC

Boost Output

Control Output

R3

R4

R5

TPS61020, TPS61024
TPS61025, TPS61027, TPS61028

SLVS451C – SEPTEMBER 2003 – REVISED JUNE 2005

PARAMETER MEASUREMENT INFORMATION

TYPICAL CHARACTERISTICS

Table of Graphs

Maximum output current vs Input voltage 1

vs Output current (TPS61020) 2
vs Output current (TPS61025) 3

Efficiency vs Output current (TPS61027) 4

vs Input voltage (TPS61025) 5
vs Input voltage (TPS61027) 6

Output voltage

No load supply current into VBAT vs Input voltage 9
No load supply current into VOUT vs Input voltage 10

Waveforms

vs Output current (TPS61025) 7
vs Output current (TPS61027) 8

Output voltage in continuous mode (TPS61025) 11
Output voltage in continuous mode (TPS61027) 12
Output voltage in power save mode (TPS61025) 13
Output voltage in power save mode (TPS61027) 14
Load transient response (TPS61025) 15
Load transient response (TPS61027) 16
Line transient response (TPS61025) 17
Line transient response (TPS61027) 18
Start-up after enable (TPS61025) 19
Start-up after enable (TPS61027) 20

FIGURE

6

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0

200

400

600

800

1000

1200

1400

0.9 1.7 2.5 3.3 4.1

Maximum Output Current - mA

4.9 6.55.7

VI - Input Voltage - V

VO = 3.3 V

VO = 5 V

VO = 1.8 V

0

10

20

30

40

50

60

70

80

90

100

1 10 100 1000

VBAT = 0.9 V

VBAT = 1.8 V

VO = 1.8 V

Efficiency - %

IO - Output Current - mA

0

10

20

30

40

50

60

70

80

90

100

1 10 100 1000

Efficiency - %

IO - Output Current - mA

VBAT = 2.4 V

VBAT = 0.9 V

VO = 3.3 V

VBAT = 1.8 V

0

10

20

30

40

50

60

70

80

90

100

1 10 100 1000

Efficiency - %

IO - Output Current - mA

VBAT = 1.2 V

VBAT = 3.6 V

VBAT = 2.4 V

VO = 5 V

VBAT = 1.8 V

TPS61020, TPS61024

TPS61025, TPS61027, TPS61028

SLVS451C – SEPTEMBER 2003 – REVISED JUNE 2005

MAXIMUM OUTPUT CURRENT TPS61020

vs EFFICIENCY

INPUT VOLTAGE vs

Figure 1. Figure 2.

TPS61025 TPS61027

EFFICIENCY EFFICIENCY

vs vs

OUTPUT CURRENT OUTPUT CURRENT

OUTPUT CURRENT

Figure 3. Figure 4.

7

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50

55

60

65

70

75

80

85

90

95

100

0.9 1.4 1.9 2.4 2.9 3.4 3.9 4.4 4.9

Efficiency - %

VI - Input Voltage - V

IO = 100 mA

VO = 3.3 V

IO = 10 mA

IO = 250 mA

50

55

60

65

70

75

80

85

90

95

100

0.9 1.4 1.9 2.4 2.9 3.4 3.9 4.4 4.9 5.4 5.9

Efficiency - %

VI - Input Voltage - V

IO = 100 mA

VO = 5 V

IO = 250 mA

IO = 10 mA

6.4

3.20

3.25

3.30

3.35

1 10 100 1000

- Output Voltage - V
V

O

IO - Output Current - mA

VBAT = 2.4 V

VO = 3.3 V

- Output Voltage - V
V

O

IO - Output Current - mA

VBAT = 3.6 V

4.80

4.85

4.90

4.95

5

5.05

5.10

1 10 100 1000

VO = 5 V

TPS61020, TPS61024
TPS61025, TPS61027, TPS61028

SLVS451C – SEPTEMBER 2003 – REVISED JUNE 2005

TPS61025 TPS61027

EFFICIENCY EFFICIENCY

vs vs

INPUT VOLTAGE INPUT VOLTAGE

TPS61025 TPS61027

OUTPUT VOLTAGE OUTPUT VOLTAGE
OUTPUT CURRENT OUTPUT CURRENT

8

Figure 5. Figure 6.

vs vs

Figure 7. Figure 8.