参数资料
型号: LTC3600IDD#PBF
厂商: Linear Technology
文件页数: 1/28页
文件大小: 0K
描述: IC REG BUCK SYNC ADJ 1.5A 12DFN
特色产品: LTC3600 Step-Down Regulator
标准包装: 121
类型: 降压(降压)
输出类型: 可调式
输出数: 1
输出电压: 0 V ~ 14.5 V
输入电压: 4 V ~ 15 V
PWM 型: 电流模式
频率 - 开关: 1MHz
电流 - 输出: 1.5A
同步整流器:
工作温度: -40°C ~ 125°C
安装类型: 表面贴装
封装/外壳: 12-WFDFN 裸露焊盘
包装: 管件
供应商设备封装: 12-DFN(3x3)

LTC3600
15V, 1.5A Synchronous
Rail-to-Rail Single Resistor
Step-Down Regulator
Single Resistor Programmable V OUT
±1% I SET Accuracy
Tight V OUT Regulation Independent of V OUT Voltage
Easy to Parallel for Higher Current and Heat Spreading
Wide V OUT Range 0V to V IN – 0.5V
High Efficiency: Up to 96%
1.5A Output Current
Adjustable Frequency: 200kHz to 4MHz
4V to 15V V IN Range
Current Mode Operation for Excellent Line and Load
Zero Supply Current in Shutdown
Available in Thermally Enhanced 12-Pin
Voltage Tracking Supplies
Point-of-Load Power Supplies
Portable Instruments
Distributed Power Systems
FEATURES
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n
n
n
n
n
n
n
n
n
Transient Response
n
n
(3mm × 3mm) DFN and MSOP Packages
APPLICATIONS
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TYPICAL APPLICATION
High Efficiency, 1MHz, 1.5A Step-Down Converter
DESCRIPTION
The LTC3600 is a high efficiency, monolithic synchronous
buck regulator whose output is programmed with just one
external resistor. The accurate internally generated 50μA
current source on the ISET pin allows the use of a single
external resistor to program an output voltage that ranges
from 0V to 0.5V below V IN . The V OUT voltage feeds directly
back to the error amplifier in unity gain fashion and equals
the ISET voltage. The operating supply voltage range is 4V
to 15V, making it suitable for dual lithium-ion battery and
5V or 12V input point-of-load power supply applications.
The operating frequency is synchronizable to an external
clock or programmable from 200kHz to 4MHz with an
external resistor. High switching frequency allows the use
of small surface mount inductors. The unique constant
on-time architecture is ideal for operating at high frequency
in high step-down ratio applications that also demand fast
load transient response.
L , LT, LTC, LTM, Linear Technology, the Linear logo and OPTI-LOOP are registered trademarks
and Hot Swap is a trademark of Linear Technology Corporation. All other trademarks are the
property of their respective owners. Protected by U.S. Patents, including 5481178, 5705919,
5847554, 6580258.
Efficiency and Power Loss vs
Output Current
LTC3600
+
ERROR
AMP
2 12
V OUT = 2.5V
DCM
V IN
12V
10μF
8
5
V IN
RUN
1
50μA
ISET
MODE/
SYNC INTV CC RT GND PGFB
6 10        3        13          4
9
BOOST
PWM CONTROL
AND SWITCH
DRIVER
SW
7
V OUT
11
ITH PGOOD
3600 TA01a
0.1μF
2.2μH
V OUT
2.5V
22μF
100
V IN = 12V
90
80
70
60
50
40
30
20
10
0
0.001 0.01
CCM
CCM
DCM
0.1 1
POWER
LOSS
10
1.0
0.9
0.8
0.7
0.6
0.5
0.4
0.3
0.2
0.1
0
0.1μF
49.9k
1μF
LOAD CURRENT (A)
3600 TA01b
3600fc
1
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