BQ27541 Datasheet, PDF (4/38 Pages) Texas Instruments – Single Cell Li-Ion Battery Fuel Gauge for Battery Pack Integration

bq27541
SLUS861 – DECEMBER 2008 ........................................................................................................................................................................................... www.ti.com
POWER-ON RESET
T_A = –40°C to 85°C, C_(REG) = 0.47µF, 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)
V_IT+
V_HYS
PARAMETER
Positive-going battery voltage input at V_CC
Power-on reset hysteresis
TEST CONDITIONS
MIN TYP MAX UNIT
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 µF, 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)
V_O
V_DO
ΔV_(REGTEMP)
ΔV_(REGLINE)
ΔV_(REGLOAD)
I_OS ⁽²⁾
PARAMETER
Regulator output voltage,
REG25
Regulator dropout voltage
Regulator output change
with temperature
Line regulation
Load regulation
Short circuit current limit
TEST CONDITION
2.7 V ≤ V_(REGIN) ≤ 5.5 V,
I_OUT ≤ 16mA
T_A = –40°C to 85°C
2.45 V ≤ V_(REGIN) < 2.7 V (low
battery), I_OUT ≤ 3mA
T_A = –40°C to 85°C
2.7 V, I_OUT ≤ 16 mA
2.45 V, I_OUT ≤ 3 mA
T_A = –40°C to 85°C
V_(REGIN) = 3.6 V,
I_OUT = 16 mA
T_A = –40°C to 85°C
2.7 V ≤ V_(REGIN) ≤ 5.5 V, I_OUT = 16 mA
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
MIN NOM
2.42 2.48
2.4
0.3%
11
34
31
MAX
2.57
UNIT
V
V
280
mV
50
25 mV
40
mV
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) = 0.47µF, 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)
G_(TEMP)
PARAMETER
Temperature sensor voltage gain
TEST CONDITIONS
MIN TYP MAX UNIT
–2
mV/°C
HIGH FREQUENCY OSCILLATOR
T_A = –40°C to 85°C, C_(REG) = 0.47µF, 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)
f_OSC
f_EIO
t_SXO
PARAMETER
Operating frequency
Frequency error^{(1) (2)}
Start-up time⁽³⁾
TEST CONDITIONS
T_A = 0°C to 60°C
T_A = –20°C to 70°C
T_A = –40°C to 85°C
MIN
–2.0%
–3.0%
-4.5%
TYP
2.097
0.38%
0.38%
0.38%
2.5
MAX
2.0%
3.0%
4.5%
5
UNIT
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% of typical oscillator frequency.
4
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