LTC3622-2_15 Datasheet, PDF (7/24 Pages) Linear Technology – 17V, Dual 1A Synchronous Step-Down Regulator with Ultralow Quiescent Current

LTC3622/
LTC3622-2/LTC3622-23/5
Typical Performance Characteristics V_IN1 = V_IN2 = 12V, T_A = 25°C, unless otherwise noted.
I_Q vs Temperature
16
SLEEP
14
SHUTDOWN
12
10
8
6
4
2
0
–100 –50 0 50 100 150 200
TEMPERATURE (°C)
3622 G19
Switch Leakage vs Temperature
50000
45000
40000
35000
NMOS1
NMOS2
PMOS1
PMOS2
30000
25000
20000
15000
10000
5000
0
–5000
–50 –25
0 25 50 75 100 125 150
TEMPERATURE (°C)
3622 G20
Out-Of-Phase Operation
SW1
10V/DIV
SW2
10V/DIV
Sync Mode Out-Of-Phase
Operation
EXTERNAL
CLOCK
2V/DIV
SW1
10V/DIV
SW2
10V/DIV
V_IN = 12V
200ns/DIV
V_OUT = 2.5V, V_OUT = 3.3V
L1 = 4.7µH, L2 = 3.3µH
OUT-OF-PHASE OPERATION
3622 G22
200ns/DIV
SYNC MODE OPERATION
EXTERNAL CLOCK PULSE WIDTH
CONTROLS PHASE SHIFT
3622 G23
V_OUT vs Load Current
5
4
3
2
1
I_LIM = GND
I_LIM = INTV_CC
0
0
0.5
1
1.5
2
LOAD CURRENT (A)
3622 G21
I_LIM vs Input Voltage
2.0
1.8
1.6
1.4
1.2
1.0
0.8
0.6
0.4
0.2
0
0
T_A = 150°C
T_A = 25°C
T_A = –45°C
3
6
9 12 15 18
INPUT VOLTAGE (V)
3622 G24
For more information www.linear.com/LTC3622
3622fa
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