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參數資料
| 型號： | LTC3615IUF#TRPBF |
| 廠商： | LINEAR TECHNOLOGY CORP |
| 元件分類： | 穩壓器 |
| 英文描述： | SWITCHING REGULATOR, PQCC24 |
| 封裝： | 4 X 4 MM, LEAD FREE, PLASTIC, MO-220WGGD, QFN-24 |
| 文件頁數： | 1/32頁 |
| 文件大?。?/td> | 585K |
| 代理商： | LTC3615IUF#TRPBF |
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LTC3615/LTC3615-1
1
3615fa
TYPICAL APPLICATION
DESCRIPTION
Dual 4MHz, 3A Synchronous
Step-Down DC/DC Converter
The LTC3615/LTC3615-1 are dual 3A synchronous step-
down regulators using a current mode, constant-frequency
architecture. The DC supply current is only 130μA (Burst
Mode operation at no-load) while maintaining the output
voltages, dropping to zero current in shutdown. The 2.25V
to 5.5V input supply range makes the parts ideally suited
for single Li-Ion applications. 100% duty cycle capability
provides low dropout operation, which extends operating
time in battery-operated systems.
The operating frequency is externally programmable up to
4MHz, allowing the use of small surface mount inductors.
0°, 90°, or 180° (LTC3615) or 140°/180° (LTC3615-1) of
phase shift between the two channels can be selected to
minimize input current ripple and output voltage ripple in a
dual 3A or single 6A output conguration. Programmable
slew rate limiting reduces EMI, and external synchronization
can be applied up to 4MHz.
The internal synchronous switches increase efciency
and eliminate the need for external catch diodes, saving
external components and board space.
The LTC3615/LTC3615-1 are offered in leadless 24-pin
4mm × 4mm QFN and thermally enhanced 24-pin eTSSOP
packages.
Efciency and Power Loss vs Load Current
FEATURES
APPLICATIONS
n High Efciency: Up to 94%
n Dual Outputs with 2 × 3A Output Current Capability
n Low Output Ripple Burst Mode Operation: IQ = 130μA
n 2.25V to 5.5V Input Voltage Range
n ±1% Output Voltage Accuracy
n Output Voltages Down to 0.6V
n Programmable Slew Rate at Switch Pins
n Low Dropout Operation: 100% Duty Cycle
n Shutdown Current ≤1μA
n Adjustable Switching Frequency Up to 4MHz
n Internal or External Compensation
n Selectable Pulse-Skipping/Forced Continuous/
Burst Mode Operation with Adjustable Burst Clamp
n Optional Active Voltage Positioning (AVP) with
Internal Compensation
n Selectable 0°/90°/180° (LTC3615) or selectable
140°/180° (LTC3615-1) Phase Shift Between Channels
n Fixed Internal and Programmable External Soft-Start
n Accurate Start-Up Tracking Capability
n DDR Memory Mode IOUT = ±1.5A
n Available in 4mm × 4mm QFN-24 and eTSSOP-24 Packages
n Point-of-Load Supplies
n Distributed Power Supplies
n Portable Computer Systems
n DDR Memory Termination
n Handheld Devices
SW1
FB1
LTC3615
3615 TA01a
SGND
PGND
RUN1
TRACK/SS1
ITH1
PHASE
RUN2
TRACK/SS2
PGOOD2
ITH2
PGOOD1
SRLIM
RT/SYNC
MODE
VIN
SVIN
PVIN1
PVIN2
100μF
SW2
FB2
0.47μH
47μF
VOUT2
2.5V/3A
665k
210k
0.47μH
47μF
VOUT1
1.8V/3A
422k
210k
L, LT, LTC, LTM, Linear Technology, Burst Mode and the Linear logo are registered trademarks
of Linear Technology Corporation. All other trademarks are the property of their respective
owners. Protected by U.S. Patents, including 5481178, 5994885, 6304066, 6498466, 6580258,
6611131.
OUTPUT CURRENT (A)
30
EFFICIENCY
(%)
POWER
LOSS
(W)
90
100
20
10
80
50
70
60
40
0.001
0.1
1
3615 TA01b
0
10
0.001
0.0001
1
0.1
0.01
VIN = 3.3V
VIN = 4V
VIN = 5V
2.25MHz
VOUT = 2.5V
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相關代理商/技術參數 |
參數描述 |
|---|---|
| LTC3615MPFE#PBF | 制造商:Linear Technology 功能描述:IC REG BUCK SYNC ADJ 3A 24TSSOP |
| LTC3615MPFE#TRPBF | 制造商:Linear Technology 功能描述:IC REG BUCK SYNC ADJ 3A 24TSSOP |
| LTC3615MPFE-1#PBF | 制造商:Linear Technology 功能描述:IC REG BUCK SYNC ADJ 3A 24TSSOP |
| LTC3615MPFE-1#TRPBF | 制造商:Linear Technology 功能描述:IC REG BUCK SYNC ADJ 3A 24TSSOP |
| LTC3615MPUF#PBF | 制造商:Linear Technology 功能描述:IC REG BUCK SYNC ADJ 3A 24QFN |
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