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| BQ27520-G3 Datasheet, PDF (6/47 Pages) Texas Instruments – System-Side Impedance Track™ Fuel Gauge With Integrated LDO | |||
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bq27520-G3
SLUSAP0 â DECEMBER 2011
3.3 POWER-ON RESET
TA = â40°C to 85°C, typical values at TA = 25°C and VREGIN = 3.6 V (unless otherwise noted)
PARAMETER
TEST CONDITIONS
MIN
VIT+
VHYS
Positive-going battery voltage input at VCC
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
TA = 25°C, CLDO25 = 1μF, VREGIN = 3.6V (unless otherwise noted)
PARAMETER
TEST CONDITION
2.5 V LDO REGULATOR(1)
MIN NOM MAX UNIT
VREG25
VIH(CE)
VIL(CE)
Regulator output voltage
2.7V ⤠VREGIN ⤠4.5V, IOUT ⤠16mA
2.45V ⤠VREGIN < 2.7V (low battery),
IOUT ⤠3mA
TA = â40°C to 85°C
TA =
to 85°C
â40°C
2.4 2.5 2.6 V
2.4
V
CE High-level input
voltage
CE Low-level input
voltage
VREGIN = 2.7 to 4.5V
2.65
TA = â40°C to 85°C
V
0.8
VDO
ÎVREGTEMP
Regulator dropout voltage
Regulator output change
with temperature
2.7V, IOUT ⤠16mA
2.45V, IOUT ⤠3mA
VREGIN = 3.6V, IOUT = 16mA
TA = â40°C to 85°C
TA = â40°C to 85°C
TA =
to 85°C
â40°C
0.5%
325
mV
50
ÎVREGLINE
ÎVREGLOAD
ISHORT (2)
Line regulation
Load regulation
Short circuit current limit
2.7V ⤠VREGIN ⤠4.5V, IOUT = 16mA
0.2mA ⤠IOUT ⤠3mA, VREGIN = 2.45 V
3mA ⤠IOUT ⤠16mA, VREGIN = 2.7 V
VREG25 = 0V
TA = â40°C to 85°C
18
40 mV
34
40
mV
31
250 mA
(1) LDO output current, IOUT, is the sum of internal and external load currents. LDO regulator should be used to power internal fuel gauge
only.
(2) Specified by design. Not production tested.
3.5 INTERNAL TEMPERATURE SENSOR CHARACTERISTICS
TA = â40°C to 85°C, 2.4 V < VCC < 2.6 V; typical values at TA = 25°C and VCC = 2.5 V (unless otherwise noted)
PARAMETER
TEST CONDITIONS
MIN TYP MAX
GTEMP
Temperature sensor voltage gain
â2
UNIT
mV/°C
3.6 HIGH-FREQUENCY OSCILLATOR
TA = â40°C to 85°C, 2.4 V < VCC < 2.6 V; typical values at TA = 25°C and VCC = 2.5 V (unless otherwise noted)
PARAMETER
TEST CONDITIONS
MIN TYP MAX
UNIT
fOSC
Operating frequency
2.097
MHz
fEIO
Frequency error(1) (2)
TA = 0°C to 60°C
TA = â20°C to 70°C
â2% 0.38%
2%
â3% 0.38%
3%
tSXO
Start-up time(3)
TA = â40°C to 85°C
â4.5% 0.38% 4.5%
2.5
5
ms
(1) The frequency error is measured from 2.097 MHz.
(2) The frequency drift is included and measured from the trimmed frequency at VCC = 2.5 V, TA = 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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Product Folder Link(s) :bq27520-G3
Copyright © 2011, Texas Instruments Incorporated
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