BQ20Z95DBTR datasheet(6/20 Pages) TI

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bq20z95

SLUS757 – JULY 2007

Electrical Characteristics (continued)

over operating free-air temperature range (unless otherwise noted), TA = –40°C to 85°C, V(REG25) = 2.41 V to 2.59 V, V(BAT) =

14 V, C(REG25) = 1 µF, C(REG33) = 2.2 µF; typical values at TA = 25°C (unless otherwise noted)

PARAMETER

TEST CONDITIONS

MIN

TYP

MAX

UNIT

tWDWT

Watchdog detect time

100

150

µs

2.5V LDO; I(REG33OUT) = 0 mA; TA = 25°C (unless otherwise noted)

4.5 < VCC or BAT < 25 V;

V(REG25)

Regulator output voltage

I(REG25OUT) ≤ 16 mA;

2.41

2.5

2.59

TA = –40°C to 100°C

Regulator output change with

I(REG25OUT) = 2 mA;

ΔV(REG25TEMP)

±0.2

temperature

TA = –40°C to 100°C

5.4 < VCC or BAT < 25 V;

ΔV(REG25LINE)

Line regulation

I(REG25OUT) = 2 mA

0.2 mA

≤ I(REG25OUT) ≤ 2 mA

ΔV(REG25LOAD)

Load Regulation

0.2 mA

≤ I(REG25OUT) ≤ 16 mA

drawing current until

I(REG25MAX)

Current Limit

REG25 = 2 V to 0 V

3.3V LDO; I(REG25OUT) = 0 mA; TA = 25°C (unless otherwise noted)

4.5 < VCC or BAT < 25 V;

V(REG33)

Regulator output voltage

I(REG33OUT) ≤ 25 mA;

3.3

3.6

TA = –40°C to 100°C

Regulator output change with

I(REG33OUT) = 2 mA;

ΔV(REG33TEMP)

±0.2

temperature

TA = –40°C to 100°C

5.4 < VCC or BAT < 25 V;

ΔV(REG33LINE)

Line regulation

I(REG33OUT) = 2 mA

0.2 mA

≤ I(REG33OUT) ≤ 2 mA

ΔV(REG33LOAD)

Load Regulation

0.2mA

≤ I(REG33OUT) ≤ 25 mA

100

drawing current until REG33 = 3 V

100

145

I(REG33MAX)

Current Limit

short REG33 to VSS, REG33 = 0 V

THERMISTOR DRIVE

V(TOUT)

Output voltage

I(TOUT) = 0 mA; TA = 25°C

V(REG25)

I(TOUT) = 1 mA; RDS(on) = (V(REG25) -

RDS(on)

TOUT pass element resistance

100

Ω

V(TOUT) )/ 1 mA; TA = –40°C to 100°C

VCELL+ HIGH VOLTAGE TRANSLATION

VC(n) - VC(n+1) = 0 V;

0.950

0.975

TA = –40°C to 100°C

V(VCELL+OUT)

VC(n) - VC(n+1) = 4.5 V;

0.275

0.3

0.375

TA = –40°C to 100°C

internal AFE reference voltage ;

V(VCELL+REF)

Translation output

0.965

0.975

0.985

TA = –40°C to 100°C

Voltage at PACK pin;

0.98

1.02

V(VCELL+PACK)

V(PACK)/18

TA = –40°C to 100°C

V(PACK)/18

Voltage at BAT pin;

0.98

1.02

V(VCELL+BAT)

V(BAT)/18

TA = –40°C to 100°C

V(BAT)/18

CMMR

Common mode rejection ratio

VCELL+

K= {VCELL+ output (VC5=0V;

VC4=4.5V) - VCELL+ output (VC5=0V;

0.147

0.150

0.153

VC4=0V)}/4.5

Cell scale factor

K= {VCELL+ output (VC2=13.5V;

VC1=18V) - VCELL+ output

0.147

0.150

0.153

(VC5=13.5V; VC1=13.5V)}/4.5

VC(n) - VC(n+1) = 0V; VCELL+ = 0 V;

I(VCELL+OUT)

Drive Current to VCELL+ capacitor

µA

TA = –40°C to 100°C

CELL output (VC2 = VC1 = 18 V) -

V(VCELL+O)

CELL offset error

-18

-1

CELL output (VC2 = VC1 = 0 V)

IVCnL

VC(n) pin leakage current

VC1, VC2, VC3, VC4, VC5 = 3 V

-1

0.01

µA

CELL BALANCING

RDS(on) for internal FET switch at

RBAL

internal cell balancing FET resistance

200

400

600

Ω

VDS = 2 V; TA = 25°C

HARDWARE SHORT CIRCUIT AND OVERLOAD PROTECTION; TA = 25°C (unless otherwise noted)

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