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LTC3832 Datasheet(PDF) 8 Page - Linear Technology

Part # LTC3832
Description  High Power Step-Down Synchronous DC/DC Controllers for Low Voltage Operation
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Manufacturer  LINER [Linear Technology]
Direct Link  http://www.linear.com
Logo LINER - Linear Technology

LTC3832 Datasheet(HTML) 8 Page - Linear Technology

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LTC3832/LTC3832-1
sn3832 3832fs
TEST CIRCUITS
FB
SS
FREQSET
COMP
IMAX
NC
NC
NC
NC
G1
G2
SHDN
VCC
VSHDN VCC
PVCC2 PVCC1
PVCC
IFB
6800pF
6800pF
3832 F02
GND
PGND
SENSE–
LTC3832
SENSE+
COMP
FB
VCOMP
VFB
G1
G2
IFB
VCC
PVCC1
5V
PVCC2
6800pF
0.1
µF
10
µF
6800pF
G1 RISE/FALL
G2 RISE/FALL
3832 F03
IMAX
GND
PGND
LTC3832
+
Figure 2
Figure 3
BLOCK DIAGRA
(LTC3832-1)
–
+
–
+
R
S
PVCC1
G1
VCC/PVCC2
G2
PGND
FB
VREF
VREF + 10%
3832 BD2
BG
Q
Q
R
POR
S
FFG2
ENABLE
G2
Q
PWM
QSS
VREF
VREF + 10%
MAX
ERR
12
µA
INTERNAL
OSCILLATOR
COMP
SS
POWER DOWN
DISABLE GATE DRIVE
THERMAL SHUTDOWN
2.2V
QC
1.2V
PVCC1
VCC + 2.5V
–
+
V
APPLICATIO S I FOR ATIO
OVERVIEW
The LTC3832/LTC3832-1 are voltage mode feedback,
synchronous switching regulator controllers (see Block
Diagram) designed for use in high power, low voltage
step-down (buck) converters. They include an onboard
PWM generator, a precision reference trimmed to
±0.8%,
two high power MOSFET gate drivers and all necessary
feedback and control circuitry to form a complete switch-
ing regulator circuit. The PWM loop nominally runs at
300kHz.
The LTC3832 includes a current limit sensing circuit that
uses the topside external N-channel power MOSFET as a
current sensing element, eliminating the need for an
external sense resistor.


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