LT3510EFEPBF Linear Technology Corporation, LT3510EFEPBF Datasheet

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LT3510EFEPBF

Manufacturer Part Number
LT3510EFEPBF
Description
TSSOP
Manufacturer
Linear Technology Corporation
Datasheet

Specifications of LT3510EFEPBF

Date_code
10+
FEATURES
APPLICATIONS
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All other trademarks are the property of their respective owners.
TYPICAL APPLICATION
12V
V
PMEG4005
, LT, LTC, and LTM are registered trademarks of Linear Technology Corporation.
IN
Wide Input Range: 3.1V to 25V
Two Switching Regulators with 2A Output Capability
Independent Supply to Each Regulator
Adjustable/Synchronizable Fixed Frequency
Operation from 250kHz to 1.5MHz
Antiphase Switching
Outputs Can be Paralleled
Independent, Sequential, Ratiometric or Absolute
Tracking Between Outputs
Independent Soft-Start and Power Good Pins
Enhanced Short-Circuit Protection
Low Dropout: 95% Maximum Duty Cycle
Low Shutdown Current: <10μA
20-Lead TSSOP Package with Exposed Leadframe
DSP Power Supplies
Disc Drives
DSL/Cable Modems
Wall Transformer Regulation
Distributed Power Regulation
PCI Cards
V
OUT1
4.7μF
3.3V
2A
3.3V and 1.8V Dual 2A Step-Down Converter with Output Tracking
PMEG4005
47μF
8.06k
24.9k
4.7μH
10pF
40.2k
470pF
0.47μF
B360A
0.1μF
SHDN
BST1
SW1
IND1
V
PG1
FB1
V
SS/TRACK1
OUT1
C1
V
IN1
LT3510
GND
SS/TRACK2
V
R
IN2
T
/SYNC
V
BST2
IND2
OUT2
SW2
PG2
FB2
V
C2
0.47μF
61.9k
40.2k
470pF
B360A
3.3μH
DESCRIPTION
The LT
DC/DC converter with two internal 2.5A switches. Inde-
pendent input voltage, feedback, soft-start and power
good pins for each channel simplify complex power
supply tracking/sequencing requirements.
Both converters are synchronized to either a common
external clock input or a resistor programmable fi xed
250kHz to 1.5MHz internal oscillator. At all frequencies, a
180° phase relationship between channels is maintained,
reducing voltage ripple and component size. Programmable
frequency allows for optimization between effi ciency and
external component size.
Minimum input-to-output voltage ratios are improved
by allowing the switch to stay on through multiple clock
cycles, only switching off when the boost capacitor needs
recharging, resulting in ~95% maximum duty cycle.
Each output can be independently disabled using its own
soft-start pin, or by using the SHDN pin the entire part can
be placed in a low quiescent current shutdown mode.
The LT3510 is available in a 20-lead TSSOP package with
exposed leadframe for low thermal resistance.
47pF
10k
Monolithic Dual Tracking
2A Step-Down Switching
8.06k
3510
®
TA01a
3510 is a dual current mode PWM step-down
100μF
V
1.8V
2A
OUT2
100
90
80
70
60
50
40
30
20
10
0
0
V
V
OUT
0.5
OUT
LOAD CURRENT (A)
Regulator
Effi ciency
= 5V
= 1.8V
1
V
I
FREQUENCY = 500kHz
OUT2
IN
V
V
= 12V
LT3510
OUT
OUT
= 0A
= 3.3V
= 2.5V
1.5
3510 TA01b
3510fc
1
2

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