BQ20Z45 Datasheet, PDF (5/20 Pages) Texas Instruments – SBS 1.1-Compliant Gas Gauge and Protection Enabled With Impedance Track™

bq20z45
www.ti.com .................................................................................................................................................................................................. SLUS800 – MARCH 2009
ELECTRICAL CHARACTERISTICS
over operating free-air temperature range (unless otherwise noted), T_A = –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 T_A = 25°C (unless otherwise noted)
PARAMETER
TEST CONDITIONS
MIN
TYP
MAX
SUPPLY CURRENT
I_(NORMAL)
Firmware running
550
I_(SLEEP)
Sleep Mode
CHG FET on; DSG FET on
124
CHG FET off; DSG FET on
90
CHG FET off; DSG FET off
52
I_(SHUTDOWN)
Shutdown Mode
SHUTDOWN WAKE; T_A = 25°C (unless otherwise noted)
I_(PACK)
Shutdown exit at V_STARTUP threshold
SRx WAKE FROM SLEEP; T_A = 25°C (unless otherwise noted)
V_(WAKE)
Positive or negative wake threshold
with 1.00 mV, 2.25 mV, 4.5 mV and 9
mV programmable options
0.1
1
1
1.25
10
V_{(WAKE_ACR)}
V_{(WAKE_TCO)}
t_(WAKE)
Accuracy of V_(WAKE)
Temperature drift of V_(WAKE) accuracy
Time from application of current and
wake of bq8040
V_(WAKE) = 1 mV;
I_(WAKE)= 0, RSNS1 = 0, RSNS0 = 1;
V_(WAKE) = 2.25 mV;
I_(WAKE) = 1, RSNS1 = 0, RSNS0 = 1;
I_(WAKE) = 0, RSNS1 = 1, RSNS0 = 0;
V_(WAKE) = 4.5 mV;
I_(WAKE) = 1, RSNS1 = 1, RSNS0 = 1;
I_(WAKE) = 0, RSNS1 = 1, RSNS0 = 0;
V_(WAKE) = 9 mV;
I_(WAKE) = 1, RSNS1 = 1, RSNS0 = 1;
-0.7
0.7
-0.8
0.8
-1.0
1.0
-1.4
1.4
0.5
1
10
POWER-ON RESET
V_IT–
Negative-going voltage input
Voltage at REG25 pin
V_hys
Hysteresis
V_IT+ – V_IT-
t_RST
RESET active low time
active low time after power up or
watchdog reset
1.70
1.80
1.90
50
150
250
100
250
560
WATCHDOG TIMER
t_WDTINT
Watchdog start up detect time
t_WDWT
Watchdog detect time
2.5V LDO; I_(REG33OUT) = 0 mA; T_A = 25°C (unless otherwise noted)
V_(REG25)
Regulator output voltage
4.5 < VCC or BAT < 25 V;
I_(REG25OUT) ≤ 16 mA;
T_A = –40°C to 100°C
ΔV_(REG25TEMP)
Regulator output change with
temperature
I_(REG25OUT) = 2 mA;
T_A = –40°C to 100°C
ΔV_(REG25LINE)
Line regulation
5.4 < VCC or BAT < 25 V;
I_(REG25OUT) = 2 mA
ΔV_(REG25LOAD) Load Regulation
0.2 mA ≤ I_(REG25OUT) ≤ 2 mA
0.2 mA ≤ I_(REG25OUT) ≤ 16 mA
I_(REG25MAX)
Current Limit
drawing current until
REG25 = 2 V to 0 V
250
500
50
100
2.41
2.5
±0.2
3
7
25
5
40
1000
150
2.59
10
25
50
75
3.3V LDO; I_(REG25OUT) = 0 mA; T_A = 25°C (unless otherwise noted)
V_(REG33)
Regulator output voltage
4.5 < VCC or BAT < 25 V;
I_(REG33OUT) ≤ 25 mA;
T_A = –40°C to 100°C
ΔV_(REG33TEMP)
Regulator output change with
temperature
I_(REG33OUT) = 2 mA;
T_A = –40°C to 100°C
ΔV_(REG33LINE)
Line regulation
5.4 < VCC or BAT < 25 V;
I_(REG33OUT) = 2 mA
ΔV_(REG33LOAD) Load Regulation
0.2 mA ≤ I_(REG33OUT) ≤ 2 mA
0.2mA ≤ I_(REG33OUT) ≤ 25 mA
3
3.3
3.6
±0.2
3
10
7
17
40
100
UNIT
µA
µA
µA
µA
µA
µA
mV
mV
%/°C
ms
V
mV
µs
ms
µs
V
%
mV
mV
mA
V
%
mV
mV
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