LTC3630_15 Datasheet, PDF (26/26 Pages) Linear Technology – High Efficiency, 65V 500mA Synchronous Step-Down Converter

LTC3630
Typical Application
4.5V to 65V Input to 3.3V Output, 1.5A Regulator
V_X
V_IN*
4.5V TO 65V
C_IN
2.2µF
V_IN
SW
LTC3630
RUN V_FB
I_SET
SS
FBO V_PRG1
V_PRG2
GND
L1
33µH
R1
200k
R2
102k
R_OSC
105k
C_ITH
1nF
R_ITH
4.32k
R1
105k
R2
475k
C_FB
10pF
SYNC/MODE INTV_CC
PGOOD
PV_IN
PV_IN
RT
BOOST
LTC3603
ITH
SW
V_FB
SW
RUN
TRACK/SS
PGND
SW
PGND
PGND
D1
C_VCC
1µF
C_BST
0.22µF
L2
2.2µH
C_IN: MURATA GCM32DR72A225KA64L
C1: TDK CGA6P1X7R1C226M
L1: COILCRAFT MSS1048T-333
C_OUT: TDK C3225X5ROJ107M
L2: VISHAY IHLP-2525CZ-01
*WHEN V_IN > 15V, LTC3630 SWITCHES AND V_X IS REGULATED TO 15V; WHEN
V_IN < 15V, LTC3630 OPERATES IN DROPOUT AND V_X FOLLOWS V_IN
C1
22µF
V_OUT
3.3V
1.5A
C_OUT
100µF
3630 TA06
Related Parts
PART NUMBER DESCRIPTION
COMMENTS
LTC3630A
76V, 500mA Synchronous Step-Down DC/DC Converter
V_IN: 4V to 76V, V_OUT(MIN) = 0.8V, I_Q = 12µA, I_SD = 5µA, 3 × 5 DFN-16,
MSOP-16(12)E
LTC3637
76V, 1A Nonsynchronous Step-Down Regulator
V_IN: 4V to 76V, V_OUT(MIN) = 0.8V, I_Q = 12µA, I_SD = 3µA, 3 × 5 DFN-16,
MSOP-16(12)E
LTC3639
150V, 100mA Synchronous Step-Down Regulator
V_IN: 4V to 150V, V_OUT(MIN) = 0.8V, I_Q = 12µA, I_SD = 1.4µA,
MSOP-16(12)E
LTC3638
140V, 250mA Nonsynchronous Step-Down Regulator
V_IN: 4V to 140V, V_OUT(MIN) = 0.8V, I_Q = 12µA, I_SD = 1.4µA,
MSOP-16(12)E
LTC3642
45V (Transient to 60V) 50mA Synchronous Step-Down
DC/DC Converter
V_IN: 4.5V to 45V, V_OUT(MIN) = 0.8V, I_Q = 12µA, I_SD = 3µA,
3 × 3 DFN-8, MSOP-8
LTC3631
45V (Transient to 60V) 100mA Synchronous Step-Down
DC/DC Converter
V_IN: 4.5V to 45V, V_OUT(MIN) = 0.8V, I_Q = 12µA, I_SD = 3µA,
3 × 3 DFN-8, MSOP-8
LTC3632
50V (Transient to 60V) 20mA Synchronous Step-Down
DC/DC Converter
V_IN: 4.5V to 50V, V_OUT(MIN) = 0.8V, I_Q = 12µA, I_SD = 3µA,
3 × 3 DFN-8, MSOP-8
LT3990
LT3991
LTC3891
62V, 350mA, 2.2MHz High Efficiency Micropower Step-Down
DC/DC Converter with I_Q = 2.5µA
55V, 1.2A, 2.2MHz High Efficiency Micropower Step-Down
DC/DC Converter with I_Q = 2.8µA
Low I_Q, 60V Synchronous Step-Down Controller
V_IN: 4.2V to 62V, V_OUT(MIN) = 1.21V, I_Q = 2.5µA, I_SD < 1µA,
3 × 3 DFN-10, MSOP-16E
V_IN: 4.3V to 55V, V_OUT(MIN) = 1.19V, I_Q = 2.8µA, I_SD < 1µA,
3 × 3 DFN-10, MSOP-10E
V_IN: 4V to 60V, V_OUT(MIN) = 0.8V, I_Q = 50µA, I_SD = 14µA,
3 × 4 QFN-20, TSSOP-20E
LTC3864
LTC3863
Low I_Q, High Voltage Step-Down DC/DC Controller with 100%
Duty Cycle
60V, Low I_Q Inverting DC/DC Controller
Fixed Frequency 50kHz to 850kHz, 3.5V ≤ V_IN ≤ 60V: 0.8V ≤ V_OUT(MIN)
≤ V_IN, I_Q = 40µA, MSOP-12E, 3 × 4 DFN-12
Fixed Frequency 50kHz to 850kHz, 3.5V ≤ V_IN ≤ 60V, –150V ≤ V_OUT(MIN)
≤ –0.4V, I_Q = 70µA, MSOP-12E, 3 × 4 DFN-12
26 Linear Technology Corporation
1630 McCarthy Blvd., Milpitas, CA 950_Fo3_r5_m-7_o4_re1_i7_{nformation www.linear.com/LTC3630}
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3630fd
LT 0714 REV D • PRINTED IN USA
 LINEAR TECHNOLOGY CORPORATION 2012