Datasheet 搜索 > 稳压芯片 > Linear Technology（凌力尔特） > LTC3736EGN-2#PBF 数据手册 > LTC3736EGN-2#PBF 数据手册 1/28 页
器件3D模型￥ 35.61
LTC3736EGN-2#PBF 数据手册 - Linear Technology（凌力尔特）
制造商:
Linear Technology（凌力尔特）
分类:
稳压芯片
封装:
SSOP-24
Pictures:
3D模型
符号图
焊盘图
引脚图
产品图
页面导航:
引脚图在P6P7Hot
典型应用电路图在P1P7P8P9P10P11P12P13P22P25P26P28
原理图在P20
封装尺寸在P27
焊盘布局在P27
技术参数、封装参数在P4
应用领域在P1P10P14P15P16P17P18P19P20P21P22P23
电气规格在P3P4P5P6P19
导航目录
LTC3736EGN-2#PBF数据手册
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LTC3736-2
1
37362fb
TYPICAL APPLICATION
DESCRIPTION
Dual 2-Phase, No R
SENSE
TM
,
Synchronous Controller
with Output Tracking
The LTC
®
3736-2 is a 2-phase dual synchronous step-down
switching regulator controller with tracking that drives
external complementary power MOSFETs using few ex-
ternal components. The constant-frequency current mode
architecture with MOSFET V
DS
sensing eliminates the need
for sense resistors and improves effi ciency. Power loss and
noise due to the ESR of the input capacitance are minimized
by operating the two controllers out-of-phase.
Pulse-skipping operation provides high effi ciency at light
loads. 100% duty cycle capability provides low dropout
operation, extending operating time in battery-powered
systems.
The switching frequency can be programmed up to 750kHz,
allowing the use of small surface mount inductors and
capacitors. For noise sensitive applications, the LTC3736-2
switching frequency can be externally synchronized from
250kHz to 850kHz. An internal soft-start, which can be
lengthened externally, smoothly ramps the output voltage
during start-up.
The LTC3736-2 is available in the tiny thermally enhanced
(4mm × 4mm) QFN and 24-lead narrow SSOP packages.
High Effi ciency, 2-Phase, Dual Synchronous DC/DC Step-Down Converter
FEATURES
APPLICATIONS
n
No Current Sense Resistors Required
n
Out-of-Phase Controllers Reduce Required
Input Capacitance
n
Tracking Function
n
Wide V
IN
Range: 2.75V to 9.8V
n
0.6V ±1% Voltage Reference
n
High Current Limit
n
Constant-Frequency Current Mode Operation
n
Low Dropout Operation: 100% Duty Cycle
n
True PLL for Frequency Locking or Adjustment
n
Selectable Pulse-Skipping/Forced Continuous
Operation
n
Auxiliary Winding Regulation
n
Internal Soft-Start Circuitry
n
Power Good Output Voltage Monitor
n
Output Overvoltage Protection
n
Micropower Shutdown: I
Q
= 9μA
n
Tiny Low Profi le (4mm × 4mm) QFN and Narrow
SSOP Packages
n
One or Two Lithium-Ion Powered Devices
n
Notebook and Palmtop Computers, PDAs
n
Portable Instruments
n
Distributed DC Power Systems
Effi ciency and Power Loss
vs Load Current (Figure 15 Circuit)
SENSE1
+
V
IN
LTC3736-2
SGND
SENSE2
+
TG1 TG2
SW1 SW2
BG1 BG2
PGND PGND
V
FB1
V
FB2
220pF
V
OUT1
2.5V
V
OUT2
1.8V
47μF
47μF
15k
220pF
15k
59k
59k
187k
118k
2.2μH
2.2μH
I
TH1
37362 TA01a
I
TH2
10μF
s2
V
IN
2.75V TO 9.8V
LOAD CURRENT (mA)
65
EFFICIENCY (%)
POWER LOSS (W)
95
100
60
55
90
75
85
80
70
1 100 1000 10000
37362 TA01b
50
10
0.01
0.1
1
0.001
10
V
OUT
= 2.5V
EFFICIENCY
POWER LOSS
, LT, LTC and LTM are registered trademarks of Linear Technology Corporation.
No R
SENSE
is a trademark of Linear Technology Corporation. All other trademarks are the
property of their respective owners. Protected by U.S. Patents, including 5481178,
5929620, 6144194, 6580258, 6304066, 6611131, 6498466.
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