LTC3832_15 Datasheet, PDF (24/24 Pages) Linear Technology – High Power Step-Down Synchronous DC/DC Controllers for Low Voltage Operation

LTC3832/LTC3832-1
TYPICAL APPLICATIO
Typical 5V to 3.3V, 10A Application
5V
+
4.7µF
MBR0530T1
+
100Ω 1µF
0.1µF
0.01µF
NC
PV_CC2
V_CC
PV_CC1
G1
SS
I_MAX
LTC3832 I_FB
FREQSET
G2
SHUTDOWN
SHDN
PGND
20k
0.1µF
0.1µF
1k
+ C_IN
330µF
×2
Q1A, Q1B
2 IN PARALLEL
L_O
1.3µH
Q2
+ C_OUT
470µF
×3
3.3V
10A
45k
1%
C1
180pF
R_C
18k
C_C
0.01µF
COMP
GND
SENSE⁺
SENSE^{– FB}
NC
10k
NC
1%
C_IN: SANYO 6TPB330M
3830 TA02
C_OUT: SANYO 4TPB470M
L_O: SUMIDA CDEP105-1R3-MC-S
Q1A, Q1B, Q2: ON SEMICONDUCTOR MTD20N03HDL
RELATED PARTS
PART NUMBER
LTC1530
LTC1628
DESCRIPTION
High Power Synchronous Switching Regulator Controller
Dual High Efficiency 2-Phase Synchronous Step-Down Controller
LTC1702
LTC1705
LTC1709
LTC1736
LTC1753
LTC1773
Dual High Efficiency 2-Phase Synchronous Step-Down Controller
Dual 550kHz Synchronous 2-Phase Switching Regulator
Controller with 5-Bit VID Plus LDO
2-Phase, 5-Bit Desktop VID Synchronous Step-Down Controller
Synchronous Step-Down Controller with 5-Bit Mobile VID Control
5-Bit Desktop VID Programmable Synchronous
Switching Regulator
Synchronous Step-Down Controller in MS10
LTC1778
LTC1873
Wide Operating Range/Step-Down Controller, No R_SENSE
Dual Synchronous Switching Regulator with 5-Bit Desktop VID
LTC1876
2-Phase, Dual Step-Down Synchronous Controller with
Integrated Step-Up DC/DC Regulator
LTC1929
2-Phase, Synchronous High Efficiency Converter
with Mobile VID
LTC3713
Low Input Voltage, High Power, No R_SENSE, Step-Down
Synchronous Controller
LTC3831
High Power Synchronous Switching Regulator Controller for
DDR Memory Termination
No R_SENSE is a trademark of Linear Technology Corporation.
COMMENTS
SO-8 with Current Limit. No R_SENSE^TM Required
Constant Frequency, Standby 5V and 3.3V LDOs,
3.5V ≤ V_IN ≤ 36V
550kHz, 25MHz GBW Voltage Mode, V_IN ≤ 7V, No R_SENSE
Provides CPU Core, I/O and CLK Supplies for Portable Systems
Current Mode, V_IN to 36V, I_OUT Up to 42A
Fault Protection, Power Good, 3.5V to 36V Input, Current Mode
1.3V to 3.5V Programmable Output Using Internal 5-Bit DAC
Up to 95% Efficiency, 550kHz, 2.65V ≤ V_IN ≤ 8.5V,
0.8V ≤ V_OUT ≤ V_IN, Synchronizable to 750kHz
V_IN Up to 36V, Current Mode, Power Good
1.3V to 3.5V Programmable Core Output Plus I/O Output
Step-Down DC/DC Conversion from 3V_IN, Minimum C_IN and
C_OUT, Uses Logic-Level N-Channel MOSFETs
Current Mode Ensures Accurate Current Sensing V_IN Up to 36V,
I_OUT Up to 40A
Minimum V_IN: 1.5V, Uses Standard Logic-Level N-Channel
MOSFETs
V_OUT Tracks 1/2 of V_IN or External Reference
24 Linear Technology Corporation
1630 McCarthy Blvd., Milpitas, CA 95035-7417
[phone] ^q FAX: [phone] ^q www.linear.com
sn3832 3832fs
LT/TP 1002 2K • PRINTED IN USA
© LINEAR TECHNOLOGY CORPORATION 2002