BQ25120A Datasheet, PDF (54/67 Pages) Texas Instruments – Low IQ Highly Integrated Battery Charge Management Solution for Wearables and IoT

bq25120A
SLUSD08 – MAY 2017
Typical Application (continued)
1.857
1.837
1.817
1.797
1.777
1.757
1.737
3
1 PA
10 PA
100 PA
1 mA
10 mA
100 mA
3.2
3.4
3.6
3.8
VBAT Voltage (V)
T_A = 25°C
V_SYS = 1.8 V
300ma
4
4.2
D008
Figure 58. 1.8 V_SYS Line Regulation
3.3845
3.3345
3.2845
3.2345
3.1845
3.8
1 PA
10 PA
100 PA
T_A = 25°C
1 mA
10 mA
100 mA
4
VBAT Voltage (V)
V_SYS = 3.3 V
Figure 60. 3.3 V_SYS Line Regulation
4.2
D014
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2.5725
2.5525
2.5325
2.5125
2.4925
2.4725
2.4525
1 PA
1 mA
2.4325
10 PA
10 mA
100 PA
100 mA
2.4125
3
3.2
3.4
3.6
3.8
4
VBAT Voltage (V)
T_A = 25°C
V_SYS = 2.1 V
Figure 59. 2.1 V_SYS Line Regulation
1400
4.2
D011
1200
1000
800
600
400
200
0
0
5 V V_BAT
4.2 V V_BAT
3.6 V V_BAT
3 V V_BAT
50
100
150
200
Load Current (mA)
2.5 V V_BAT
250
300
D023
Figure 61. 1.8 V_SYS Switching Frequency vs Load Current
SW
SW
I_LOAD = 10 µA
Time 40 ms/div
Figure 62. Light Load Operation Showing SW
I_LOAD = 100 mA
Time 40 ms/div
Figure 63. Light Load Operation Showing SW
54
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