TPS62230_10 Datasheet, PDF (14/32 Pages) Texas Instruments – 2 MHz / 3 MHz Ultra Small Step Down Converter in 1x1.5 SON Package

TPS62230, TPS62231, TPS62232, TPS62233, TPS62234
TPS62235, TPS62236, TPS62237, TPS62238, TPS62239
TPS622310, TPS622311, TPS622312, TPS622313, TPS622314
SLVS941C – APRIL 2009 – REVISED APRIL 2010
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0.2
0.18
T_A = 85°C
0.16
0.14
0.12
0.1
TYPICAL CHARACTERISTICS (continued)
2
1.8
T_A = 85°C
1.6
T_A = 60°C
1.4
T_A = 25°C
1.2
T_A = -40°C
1
PMOS
0.08
T_A = 60°C T_A = 25°C ^{TA = -40°C}
0.8
0.06
0.6
0.04
0.4
0.02
0
2 2.5 3 3.5 4 4.5 5 5.5 6
V_IN - Input Voltage - V
Figure 29. Shutdown Current I_SD vs Ambient Temperature T_A
0.2
0
2 2.5 3 3.5 4 4.5 5 5.5 6
V_IN - Input Voltage - V
Figure 30. PMOS R_DSON vs Supply Voltage V_IN and Ambient
Temperature T_A
0.7
T_A = 85°C
0.6
T_A = 60°C
NMOS
0.5
T_A = 25°C
T_A = -40°C
0.4
0.3
0.2
0.1
0
2 2.5 3 3.5 4 4.5 5 5.5 6
V_IN - Input Voltage - V
Figure 31. NMOS R_DSON vs Supply Voltage V_IN and Ambient
Temperature T_A
100
90
I_OUT = 50 mA,
MODE = 0,
forced PWM
80
70
60 I_OUT = 50 mA,
MODE = 1,
50 PFM/PWM
I_OUT = 150 mA,
40
PWM Mode
30
20
10
0
10
V_IN = 3.6 V,
V_OUT = 1.8 V,
C_IN = 2.2 mF,
C_OUT = 4.7 mF,
L = 2.2 mH
100
1k
10k
100k
1M
f - Frequency - kHz
Figure 32. TPS62231 1.8V PSRR
14
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