ltm8008 Linear Technology Corporation, ltm8008 Datasheet - Page 7

• Manufacturer Part Number: ltm8008
• Description: Ltm8008 - 72vin, 6 Output Dc/dc Sepic ?module Regulator
• Manufacturer: Linear Technology Corporation

siMpliFieD block DiagraM
operaTion
The LTM8008 is a SEPIC equipped with six high perfor-
mance linear post regulators. The device contains the SEPIC
power MOSFET, controller, linear regulators and optimized
support circuitry. The current limit for the SEPIC converter
is internally set to 8.2A. The output of the SEPIC converter
is internally set to 5.6V, which is the optimal voltage for
running the six post regulators at the best combination
of efficiency, ripple rejection and thermal performance.
The SEPIC converter is equipped with several control pins.
These include RUN for enabling and sequencing, SS for
V
INTV
RUN
SS
SYNC
RT
V
IN
C
CC
PRE-REGULATOR
CONTROLLER
LINEAR
SEPIC
COMPONENTS
GND
EXTERNAL
POWER
Q1
SW
soft-start control, SYNC for frequency synchronization, RT
for setting the operating frequency and V
compensation. There are also power ports, V
SPV and the six post regulator outputs, V
well as the SEPIC converter switch node, SW.
Of the six linear post regulators, one produces 5V at 500mA,
a second produces 3.3V at 300mA and the remaining
four provide 5V at 150mA each. Each one is individually
equipped with overcurrent, reverse voltage and thermal
protection.
•
REGULATORS
LINEAR
POST
3.3V AT 300mA
5V AT 500mA
5V AT 150mA
5V AT 150mA
5V AT 150mA
5V AT 150mA
V
V
V
V
V
V
OUT1
OUT6
OUT2
OUT3
OUT4
OUT5
5.6V
SPV
8008 BD
LTM8008
OUT1,2,3,4,5,6
C
for frequency
IN
, INTV
8008fa
7
, as
CC
,