TPS6734I

FIXED 12-V 120-mA BOOST-CONVERTER SUPPLY

SLVS127A – AUGUST 1995 – REVISED JANUARY 1999

6

POST OFFICE BOX 655303

recommended operating conditions

MIN

NOM

MAX

UNIT

Supply voltage

2.7

5

12

V

Compensation capacitor

0.001

µF

Output current at REF

0

100

µA

Reference capacitor

0.01

µF

Operating free-air temperature, TA

–40

85

°C

shown in Figure 13)

PARAMETER

TEST CONDITIONS

MIN

TYP

MAX

UNITS

Operating

Entire circuit

1.2

2.5

mA

Supply current

Standby

EN = 0.4 V, entire circuit

3

µA

Standby

EN = 0.4 V, into VCC

3

µA

High-level input threshold voltage at EN

2

V

Low-level input threshold voltage at EN

0.4

V

Shutdown input leakage current at EN

–1

1

µA

On resistance at OUT

Current at OUT = 500 mA

0.7

Ω

Leakage current at OUT

VDS = 12 V

1

µA

Reference voltage

1.22

V

Reference drift

TA = – 40°C to 85°C

6.7

ppm/

°C

Oscillator frequency

170

kHz

Compensation pin impedance

7500

Ω

performance characteristics over recommended operating free-air temperature range, typical

PARAMETER

TEST CONDITIONS

MIN

TYP

MAX

UNITS

Output voltage

VCC = 4.75 V,

0 mA < IO(LOAD) < 120 mA

11.64

12.12

12.6

V

Load current

VCC = 3.75 V

120

150

mA

Load current

VCC = 3.0 V,

Figure 11

150

mA

Line regulation

VCC = 5 V to 12 V,

IO(LOAD) = 50 mA

0.20%

Load regulation

IO(LOAD) = 0 mA to 120 mA

0.0042%

Efficiency

VCC = 5 V,

IO(LOAD) = 120 mA

86%