LTC3569_15 Datasheet, PDF (7/26 Pages) Linear Technology – Triple Buck Regulator with 1.2A and Two 600mA Outputs and Individual Programmable References

LTC3569
Typical Performance Characteristics T_A = 25°C, unless otherwise noted.
Load Step Cross Talk, Pulse-Skipping,
V_IN = 3.6V, CH1 = V_OUT1, CH2 = V_OUT2,
CH3 = V_OUT3, CH4 = I_LOAD1
Load Step Cross Talk, Pulse-Skipping,
V_IN = 3.6V, CH1 = V_OUT1, CH2 = V_OUT2,
CH3 = V_OUT3, CH4 = I_LOAD2
CH1
310mV_P-P
CH2
16.8mV_P-P
CH3
12mV_P-P
100mV/DIV
20mV/DIV
20mV/DIV
CH1
9.6mV_P-P
CH2
246mV_P-P
CH3
8mV_P-P
20mV/DIV
100mV/DIV
20mV/DIV
CH4
1.2A
20µs/DIV
500mA/DIV
3569 G19
CH4
600mA
20µs/DIV
500mA/DIV
3569 G20
Load Step Cross Talk, Pulse-Skipping,
V_IN = 3.6V, CH1 = V_OUT1, CH2 = V_OUT2,
CH3 = V_OUT3, CH4 = I_LOAD3
CH1
11.6mV_P-P
CH2
11.2mV_P-P
CH3
266mV_P-P
20mV/DIV
20mV/DIV
100mV/DIV
CH4
600mA
20µs/DIV
500mA/DIV
3569 G21
Soft-Start Into Heavy Load, PS, V_IN =
3.6V, CH1 = V_OUT1, CH2 = V_OUT2, CH3
= V_OUT3, CH4 = I_IN, R2 = PGOOD
CH1 500mV/DIV
CH3 500mV/DIV
CH2 500mV/DIV
R2
2V/DIV
CH4
500mA/DIV
400µs/DIV
3569 G23
I_SW Leakage vs V_SUPPLY Buck 1
10000
1000
V_IN = 3.6V
V_FB = 0.9V
BUCK2, BUCK3 OFF
100
85°C
10
1
0.1
25°C
0.01
–50°C
0.001
0
1
2
V_SW (V)
3 3.6
3569 G22
Soft-Start Into Light Load, PS, V_IN =
3.6V, CH1 = V_OUT1, CH2 = V_OUT2, CH3
= V_OUT3, CH4 = I_IN, R3 = PGOOD
CH1 500mV/DIV
CH3 500mV/DIV
CH2 500mV/DIV
R3
2V/DIV
400µs/DIV
CH4
50mA/DIV
3569 G24
For more information www.linear.com/LTC3569
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