LTC3773EG-PBF LINER [Linear Technology], LTC3773EG-PBF Datasheet
LTC3773EG-PBF
Manufacturer Part Number
LTC3773EG-PBF
Description
Triple Output Synchronous 3-Phase DC/DC Controller with Up/Down Tracking
Manufacturer
LINER [Linear Technology]
Datasheet
1.LTC3773EG-PBF.pdf
(32 pages)
FEATURES
APPLICATIONS
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TYPICAL APPLICATION
Current Mode Controller with Onboard
MOSFET Drivers
Programmable Power Up/Down Tracking
Wide V
±1% 0.6V V
Power Good Output Voltage Monitor
Phase-Lockable or Adjustable Frequency:
160kHz to 700kHz
OPTI-LOOP
Current Foldback and Overvoltage Protection
Selectable Continuous, Discontinuous or
Burst Mode
Programmable Phase Operation
Available in 5mm x 7mm QFN and 36-Lead
SSOP Packages
Servers, Telecom, Industrial Power Supplies
General Purpose Multiple Rail DC/DC
FPGA and DSP Requirements
IN
Range: 3.3V to 36V (V
®
®
FB
C
OUT1
Compensation Minimizes C
Operation at Light Load
2.5V/15A
Accuracy Over Temperature
V
OUT1
0.003Ω
31.6k
POWER UP/SHUTDOWN
High Effi ciency, 3-Phase, Triple Synchronous DC/DC Step-Down Controller
10k
2.2μH
V
IN
CC
0.01μF
PGOOD
= 5V)
10k
PGOOD V
SDB1, 2, 3
TRACK1, 2, 3
TG1
SW1
BG1
SENSE1 +
SENSE1 –
V
I
TH1, 2, 3
FB1
OUT
PLLFLTR
CC
SW1, 2, 3
LTC3773
SGND
0.1μF
BOOST1, 2, 3
3-Phase DC/DC Controller with
DESCRIPTION
Linear Technology Corporation. All other trademarks are the property of their respective
owners. Protected by U.S. Patents including 5408150, 5481178, 5705919, 5929620,
6144194, 6177787, 6304066, 6498466, 6580258, 6611131.
The LTC
synchronous step-down switching regulator controller
with output voltage power up/down tracking capability.
The controller allows for sequential, coincident or ratio-
metric tracking.
This 3-phase controller drives its output stages with 120°
phase separation at frequencies of up to 700kHz per phase
minimizing the RMS input current. Light load effi ciency can
be maximized by using selectable Burst Mode operation.
The 0.6V precision reference supports output voltages
from 0.6V to 5V.
Fault protection features include output overvoltage, input
undervoltage lockout plus current foldback under short-
circuit or overload conditions.
SENSE2 +
SENSE2 –
SENSE3 +
SENSE3 –
PGND
, LT, LTC, LTM, Burst Mode and OPTI-LOOP are registered trademarks of
SW2
V
SW3
V
V
TG2
BG2
TG3
BG3
3773 F01
FB2
FB3
DR
®
Triple Output Synchronous
10μF
3773 is a high performance, 3-phase, triple output
V
V
4.5V TO 6V
IN
CC
20k
1.5μH
1.2μH
20k
0.003Ω
0.003Ω
Up/Down Tracking
1.8V/15A
1.2V/15A
V
V
+
OUT2
OUT3
C
C
OUT2
OUT3
20k
10k
V
4.5V TO 22V
C
IN
IN
LTC3773
3773fb
1
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