bq76925

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SLUSAM9B

– JULY 2011 – REVISED DECEMBER 2011

3.3 V Voltage Regulator

PARAMETER

TEST CONDITION

MIN

TYP

MAX

UNIT

3.3 V VOLTAGE REGULATOR

Measured at VCTL, V3P3 regulating

3.3

26.4

V

Regulator output

3.2

3.3

3.4

V

BAT = 4.2 to 26.4 V

V3P3 output current

4.0

mA

V3P3 short circuit current limit

V3P3 = 0.0 V

10.0

17.0

mA

Thermistor bias voltage

V

Thermistor bias current

1.0

mA

90

130

Ω

(1)

When a bypass FET is used to supply the regulated 3.3V load current, VCTL automatically adjusts to keep V3P3 = 3.3 V. Note that

(2)

If VCTL is tied to BAT, the load current is supplied through V3P3.

Voltage Reference

PARAMETER

TEST CONDITION

MIN

TYP

MAX

UNIT

VOLTAGE REFERENCE

REF_SEL = 0

1.44

1.56

V

REF_SEL = 1

2.88

3.12

Voltage reference output

REF_SEL = 0

–0.1%

1.5

+0.1%

REF_SEL = 1

–0.1%

3.0

+0.1%

VCOUT_SEL = 2

–0.9%

0.5

×

+0.9%

V

Reference calibration

VCOUT_SEL = 3

–0.5%

0.85

×

+0.5%

Measured at VCOUT

voltage

(0.85

–0.3%

0.35

×

+0.3%

V

–40

40

ppm/

°C

VREF output current

10

µA

(1)

Gain correction factor determined at final test and stored in non-volatile storage. Gain correction is applied by Host controller.

Cell Voltage Amplifier

PARAMETER

TEST CONDITION

MIN

TYP

MAX

UNIT

REF_SEL = 0

–1.6%

0.3

1.5%

Measured from VCn to VCOUT

REF_SEL = 1

–1.6%

0.6

1.5%

Measured from VCn to VCOUT

–16

15

mV

REF_SEL = 0

1.47

1.5

1.53

V

Measured at VCOUT, VCn = 5.0 V

REF_SEL = 1

2.94

3.0

3.06

V

Measured at VCOUT, VCn = 0.0 V

0.0

V

VCn = 1.4 V to 4.4 V, After

–3

3

–5

5

mV

–8

8

10

µA

100

µs

(1)

For VCn values greater than 5.0 V, VCOUT clamps at approximately V3P3.

(2)

Correction factor determined at final test and stored in non-volatile storage. Correction is applied by Host controller.

(3)

Output referred. Input referred accuracy is calculated as

(4)

Correction factors are calibrated for gain of 0.6. Tolerance at gain of 0.3 is approximately doubled. Contact TI for information on devices

calibrated to a gain of 0.3.

(5)

Max DC load for specified accuracy.

Copyright

© 2011, Texas Instruments Incorporated

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