TPS61085-Q1_15 Datasheet, PDF (6/24 Pages) Texas Instruments – 650-kHz/1.2-MHz 18.5-V STEP-UP DC-DC CONVERTER

TPS61085T-Q1
SLVSAI9 – SEPTEMBER 2010
PWM SWITCHING
DISCONTINUOUS CONDUCTION MODE
V_SW
5 V/div
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PWM SWITCHING
CONTINUOUS CONDUCTION MODE
V_SW
5 V/div
V_{S_AC}
50 mV/div
V_IN = 3.3 V
V_S = 12 V/1 mA
I_L
200 mA/div
V_S_AC
200 mV/div
200 ns/div
Figure 3.
LOAD TRANSIENT RESPONSE
HIGH FREQUENCY (1.2 MHz)
V_IN = 3.3 V
V_S = 12 V
C_out = 20 mF
L = 3.3 mH
R_comp = 51 kW
C_comp = 1.6 nF
V_{S_AC}
50 mV/div
I_L
1 A/div
V_IN = 3.3 V
V_S = 12 V/300 mA
V_S_AC
200 mV/div
200 ns/div
Figure 4.
LOAD TRANSIENT RESPONSE
LOW FREQUENCY (650 kHz)
V_IN = 3.3 V
V_S = 12 V
C_out = 20 mF
L = 6.8 mH
R_comp = 24 kW
C_comp = 3.3 nF
I_OUT = 50 mA - 200 mA
I_OUT
100 mA/div
200 ms/div
Figure 5.
I_OUT = 50 mA - 200 mA
I_OUT
100 mA/div
200µs/div
200 ms/div
Figure 6.
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