LTC3600_15 Datasheet, PDF (6/28 Pages) Linear Technology – 15V, 1.5A Synchronous Rail-to-Rail Single Resistor Step-Down Regulator

LTC3600
Typical Performance Characteristics
Transient Response DCM,
Operation, External Compensation
Transient Response DCM,
Operation, Internal Compensation
Output Tracking
V_OUT
100mV/DIV
AC-
COUPLED
V_OUT
100mV/DIV
AC-
COUPLED
I_SET
VOLTAGE
V_OUT
2V/DIV
I_SET
VOLTAGE
I_L
1A/DIV
I_L
1A/DIV
I_INDUCTOR
CURRENT
500mA/DIV
20µs/DIV
3600 G10
V_IN = 12V
V_OUT = 3.3V
I_OUT = 0.1A TO 1A
L = 4.7µH
f_SW = 1MHz
R_ITH = 27.5kΩ, C_ITH = 250pF
MODE = 0
C_OUT = 47µF
20µs/DIV
V_IN = 12V
V_OUT = 3.3V
I_OUT = 0.1A TO 1A
L = 4.7µH
f_SW =1MHz
ITH = INTV_CC
MODE = 0
C_OUT = 47µF
3600 G11
V_OUT
1ms/DIV
3600 G12
Discontinuous Conduction
Mode Operation
I_L
1A/DIV
Continuous Conduction
Mode Operation
I_L
1A/DIV
V_SW
5V/DIV
V_IN = 15V
V_OUT = 2.5V
MODE = 0
L = 2.2µH
V_SW
5V/DIV
3600 G13
V_IN = 15V
V_OUT = 2.5V
MODE = INTV_CC
L = 2.2µH
3600 G14
Switching Frequency/Period vs RT
3.5
6
3.0
2.5
2.0
1.5
1.0
0.5
0
0
5
4
3
t_SW
2
f_SW
1
50
100
150
RT (kΩ)
0
200
3600 G15
6
Switch Leakage Current
10
V_IN = 12V
8
6
MBOT
4
MTOP
2
0
–50 –30 –10 10 30 50 70 90 110 130
TEMPERATURE (°C)
3600 G16
INTV_CC Load Regulation
5.00
4.98
4.96
4.94
4.92
4.90
4.88
4.86
0
10 20 30 40 50 60 70 80 90 100
INTV_CC CURRENT (mA)
3600 G17
3600fc