BQ25570_14 Datasheet, PDF (7/41 Pages) Texas Instruments – Ultra Low Power Harvester Power Management IC with Boost Charger, and Nano-Powered Buck Converter

bq25570
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SLUSBH2C – MARCH 2013 – REVISED JANUARY 2014
ELECTRICAL CHARACTERISTICS
Over recommended ambient temperature range, typical values are at T_A = 25°C. Unless otherwise noted, specifications apply
for conditions of VSTOR = 4.2 V, V_OUT = 1.8 V. External components, C_IN = 4.7 µF, L1 = 22 µH, CSTOR = 4.7 µF, L2 = 10
µH, C_OUT = 22 µF
PARAMETER
TEST CONDITIONS
MIN
TYP
MAX UNIT
BUCK CONVERTER
VOUT
Output regulation (excluding resistor tolerance
error)
Output line regulation
Output load regulation
I_OUT = 10 mA;
1.3 V < V_OUT < 3.3 V
I_OUT = 10 mA;
VSTOR = 2.1 V to 5.5 V,
C_OUT = 22 µF
I_OUT = 100 µA to 95 mA,
VSTOR = 3.6 V, C_OUT = 22
µF
–2
0.09
-0.01
2%
%/V
%/mA
Output ripple
Programmable voltage range for output voltage
threshold
VSTOR = 4.2V, I_OUT = 1 mA,
C_OUT = 22 μF
30
mVpp
VSTOR –
1.3
V
0.2 ⁽¹⁾
IOUT
Output Current
VSTOR = 3.3V; V_OUT = 1.8 V
93
110
mA
t_START-STBY
Startup time with EN low and VOUT_EN transition
to high (Standby Mode)
C_OUT = 22 µF
250
μs
t_START-SHIP
Startup time with VOUT_EN high and EN
transition from high to low (Ship Mode)
C_OUT = 22 µF
100
ms
I-BUCK(CBC-LIM)
Cycle-by-cycle current limit of buck converter
2.4 V < VSTOR < 5.5 V;
1.3 V < V_OUT < 3.3 V
160
185
205 mA
(1) The dropout voltage can be computed as the maximum output current times the buck high side resistance.
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