BQ27541-V200_1007 Datasheet, PDF (4/43 Pages) Texas Instruments – Single Cell Li-Ion Battery Fuel Gauge for Battery Pack Integration

bq27541-V200
SLUSA11 – FEBRUARY 2010
www.ti.com
POWER-ON RESET
T_A = –40°C to 85°C, C_(REG) = 0.47mF, 2.45 V < V_(REGIN) = V_BAT < 5.5 V; typical values at T_A = 25°C and V_(REGIN) = V_BAT = 3.6 V
(unless otherwise noted)
PARAMETER
TEST CONDITIONS
MIN TYP MAX UNIT
V_IT+
V_HYS
Positive-going battery voltage input at V_CC
Power-on reset hysteresis
2.05 2.20 2.31 V
45
115
185 mV
2.5 V LDO REGULATOR⁽¹⁾
T_A = –40°C to 85°C, C_(REG) = 0.47 mF, 2.45 V < V_(REGIN) = V_BAT < 5.5 V; typical values at T_A = 25°C and V_(REGIN) = V_BAT = 3.6 V
(unless otherwise noted)
PARAMETER
TEST CONDITION
MIN NOM MAX UNIT
V_O
Regulator output voltage,
REG25
2.7 V ≤ V_(REGIN) ≤ 5.5 V,
I_OUT ≤ 16mA
2.45 V ≤ V_(REGIN) < 2.7 V (low
battery), I_OUT ≤ 3mA
T_A = –40°C to 85°C
2.42
2.4
2.48
2.57
V
V
V_DO
Regulator dropout voltage ^{2.7 V, IOUT ≤ 16 mA}
2.45 V, I_OUT ≤ 3 mA
T_A = –40°C to 85°C
280
mV
50
ΔV_(REGTEMP)
Regulator output change
with temperature
V_(REGIN) = 3.6 V,
I_OUT = 16 mA
T_A = –40°C to 85°C
0.3%
ΔV_(REGLINE)
Line regulation
2.7 V ≤ V_(REGIN) ≤ 5.5 V, I_OUT = 16 mA
11
25 mV
ΔV_(REGLOAD)
I_OS ⁽²⁾
Load regulation
Short circuit current limit
0.2 mA ≤ I_OUT ≤ 3 mA, V_(REGIN) = 2.45 V
3 mA ≤ I_OUT ≤ 16 mA, V_(REGIN) = 2.7 V
V_(REG25) = 0 V
T_A = –40°C to 85°C
34
40
mV
31
250 mA
(1) LDO output current, I_OUT, is the sum of internal and external load currents.
(2) Specified by design. Not production tested.
INTERNAL TEMPERATURE SENSOR CHARACTERISTICS
T_A = –40°C to 85°C, C_(REG) = 0.47mF, 2.45 V < V_(REGIN) = V_BAT < 5.5 V; typical values at T_A = 25°C and V_(REGIN) = V_BAT = 3.6 V
(unless otherwise noted)
PARAMETER
TEST CONDITIONS
MIN TYP MAX UNIT
G_(TEMP)
Temperature sensor voltage gain
–2.0
mV/°C
HIGH FREQUENCY OSCILLATOR
T_A = –40°C to 85°C, C_(REG) = 0.47mF, 2.45 V < V_(REGIN) = V_BAT < 5.5 V; typical values at T_A = 25°C and V_(REGIN) = V_BAT = 3.6 V
(unless otherwise noted)
PARAMETER
TEST CONDITIONS
MIN TYP MAX UNIT
f_(OSC) Operating frequency
f_(EIO)
Frequency error^{(1) (2)}
t_(SXO) Start-up time⁽³⁾
T_A = 0°C to 60°C
T_A = –20°C to 70°C
T_A = –40°C to 85°C
–2.0%
–3.0%
-4.5%
2.097
0.38%
0.38%
0.38%
2.5
2.0%
3.0%
4.5%
5
MHz
ms
(1) The frequency error is measured from 2.097 MHz.
(2) The frequency drift is included and measured from the trimmed frequency at V_CC = 2.5 V, T_A = 25°C.
(3) The startup time is defined as the time it takes for the oscillator output frequency to be ±3%.
4
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