BQ27520-G2 Datasheet, PDF (6/47 Pages) Texas Instruments – System-Side Impedance Track™ Fuel Gauge With Integrated LDO

bq27520-G2
SLUSAB7A – MARCH 2011 – REVISED AUGUST 2011
3.3 POWER-ON RESET
T_A = –40°C to 85°C, typical values at T_A = 25°C and V_REGIN = 3.6 V (unless otherwise noted)
PARAMETER
TEST CONDITIONS
MIN
V_IT+
V_HYS
Positive-going battery voltage input at V_CC
Power-on reset hysteresis
2.09
45
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TYP MAX UNIT
2.20 2.31 V
115
185 mV
3.4 2.5V LDO REGULATOR
T_A = 25°C, C_LDO25 = 1μF, V_REGIN = 3.6V (unless otherwise noted)
PARAMETER
TEST CONDITION
2.5 V LDO REGULATOR⁽¹⁾
V_REG25
V_IH(CE)
V_IL(CE)
Regulator output voltage
CE High-level input
voltage
CE Low-level input
voltage
2.7V ≤ V_REGIN ≤ 4.5V, I_OUT ≤ 16mA
2.45V ≤ V_REGIN < 2.7V (low battery),
I_OUT ≤ 3mA
VREGIN = 2.7 to 4.5V
T_A = –40°C to 85°C
T_A = –40°C to 85°C
T_A = –40°C to 85°C
V_DO
ΔV_REGTEMP
Regulator dropout voltage
Regulator output change
with temperature
2.7V, I_OUT ≤ 16mA
2.45V, I_OUT ≤ 3mA
V_REGIN = 3.6V, I_OUT = 16mA
T_A = –40°C to 85°C
T_A = –40°C to 85°C
T_A = –40°C to 85°C
ΔV_REGLINE
ΔV_REGLOAD
I_SHORT ⁽²⁾
Line regulation
Load regulation
Short circuit current limit
2.7V ≤ V_REGIN ≤ 4.5V, I_OUT = 16mA
0.2mA ≤ I_OUT ≤ 3mA, V_REGIN = 2.45 V
3mA ≤ I_OUT ≤ 16mA, V_REGIN = 2.7 V
V_REG25 = 0V
T_A = –40°C to 85°C
(1) LDO output current, I_OUT, is the sum of internal and external load currents.
(2) Assured by design. Not production tested.
MIN NOM MAX UNIT
2.4 2.5 2.54 V
2.4
V
2.65
0.5%
18
34
31
V
0.8
325
mV
50
40 mV
40
mV
250 mA
3.5 INTERNAL TEMPERATURE SENSOR CHARACTERISTICS
T_A = –40°C to 85°C, 2.4 V < V_CC < 2.6 V; typical values at T_A = 25°C and V_CC = 2.5 V (unless otherwise noted)
PARAMETER
TEST CONDITIONS
MIN TYP MAX
G_TEMP
Temperature sensor voltage gain
–2
UNIT
mV/°C
3.6 HIGH-FREQUENCY OSCILLATOR
T_A = –40°C to 85°C, 2.4 V < V_CC < 2.6 V; typical values at T_A = 25°C and V_CC = 2.5 V (unless otherwise noted)
PARAMETER
TEST CONDITIONS
MIN TYP MAX
UNIT
f_OSC
f_EIO
t_SXO
Operating frequency
Frequency error^{(1) (2)}
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%
–3%
–4.5%
2.097
0.38%
0.38%
0.38%
2.5
2%
3%
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 start-up time is defined as the time it takes for the oscillator output frequency to be within ±3% of typical oscillator frequency.
6
ELECTRICAL SPECIFICATIONS
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