Datasheet

ELECTRICAL CHARACTERISTICS
bq20z45
www.ti.com .................................................................................................................................................................................................. SLUS800 – MARCH 2009
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 µ F, C
(REG33)
= 2.2 µ F; typical values at T
A
= 25 ° C (unless otherwise noted)
PARAMETER TEST CONDITIONS MIN TYP MAX UNIT
SUPPLY CURRENT
I
(NORMAL)
Firmware running 550 µ A
I
(SLEEP)
Sleep Mode CHG FET on; DSG FET on 124 µ A
CHG FET off; DSG FET on 90 µ A
CHG FET off; DSG FET off 52 µ A
I
(SHUTDOWN)
Shutdown Mode 0.1 1 µ A
SHUTDOWN WAKE; T
A
= 25 ° C (unless otherwise noted)
I
(PACK)
Shutdown exit at V
STARTUP
threshold 1 µ A
SRx WAKE FROM SLEEP; T
A
= 25 ° C (unless otherwise noted)
Positive or negative wake threshold
V
(WAKE)
with 1.00 mV, 2.25 mV, 4.5 mV and 9 1.25 10 mV
mV programmable options
V
(WAKE)
= 1 mV;
-0.7 0.7
I
(WAKE)
= 0, RSNS1 = 0, RSNS0 = 1;
V
(WAKE)
= 2.25 mV;
I
(WAKE
) = 1, RSNS1 = 0, RSNS0 = 1; -0.8 0.8
I
(WAKE)
= 0, RSNS1 = 1, RSNS0 = 0;
V
(WAKE_ACR)
Accuracy of V
(WAKE)
mV
V
(WAKE)
= 4.5 mV;
I
(WAKE)
= 1, RSNS1 = 1, RSNS0 = 1; -1.0 1.0
I
(WAKE)
= 0, RSNS1 = 1, RSNS0 = 0;
V
(WAKE)
= 9 mV;
-1.4 1.4
I
(WAKE)
= 1, RSNS1 = 1, RSNS0 = 1;
V
(WAKE_TCO)
Temperature drift of V
(WAKE)
accuracy 0.5 %/ ° C
Time from application of current and
t
(WAKE)
1 10 ms
wake of bq8040
POWER-ON RESET
V
IT –
Negative-going voltage input Voltage at REG25 pin 1.70 1.80 1.90 V
V
hys
Hysteresis V
IT+
– V
IT-
50 150 250 mV
active low time after power up or
t
RST
RESET active low time 100 250 560 µ s
watchdog reset
WATCHDOG TIMER
t
WDTINT
Watchdog start up detect time 250 500 1000 ms
t
WDWT
Watchdog detect time 50 100 150 µ s
2.5V LDO; I
(REG33OUT)
= 0 mA; T
A
= 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 V
T
A
= – 40 ° C to 100 ° C
Regulator output change with I
(REG25OUT)
= 2 mA;
Δ V
(REG25TEMP)
± 0.2 %
temperature T
A
= – 40 ° C to 100 ° C
5.4 < VCC or BAT < 25 V;
Δ V
(REG25LINE)
Line regulation 3 10 mV
I
(REG25OUT)
= 2 mA
0.2 mA ≤ I
(REG25OUT)
≤ 2 mA 7 25
Δ V
(REG25LOAD)
Load Regulation mV
0.2 mA ≤ I
(REG25OUT)
≤ 16 mA 25 50
drawing current until
I
(REG25MAX)
Current Limit 5 40 75 mA
REG25 = 2 V to 0 V
3.3V LDO; I
(REG25OUT)
= 0 mA; T
A
= 25 ° C (unless otherwise noted)
4.5 < VCC or BAT < 25 V;
V
(REG33)
Regulator output voltage I
(REG33OUT)
≤ 25 mA; 3 3.3 3.6 V
T
A
= – 40 ° C to 100 ° C
Regulator output change with I
(REG33OUT)
= 2 mA;
Δ V
(REG33TEMP)
± 0.2 %
temperature T
A
= – 40 ° C to 100 ° C
5.4 < VCC or BAT < 25 V;
Δ V
(REG33LINE)
Line regulation 3 10 mV
I
(REG33OUT)
= 2 mA
0.2 mA ≤ I
(REG33OUT)
≤ 2 mA 7 17
Δ V
(REG33LOAD)
Load Regulation mV
0.2mA ≤ I
(REG33OUT)
≤ 25 mA 40 100
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