参数资料
型号: LTC3536IDD#PBF
厂商: Linear Technology
文件页数: 1/28页
文件大小: 0K
描述: IC REG BUCK BOOST SYNC ADJ 12DFN
标准包装: 121
类型: 降压(降压),升压(升压)
输出类型: 可调式
输出数: 1
输出电压: 1.8 V ~ 5.5 V
输入电压: 1.8 V ~ 5.5 V
PWM 型: 电压模式,混合
频率 - 开关: 300kHz ~ 2MHz
电流 - 输出: 1A
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: 10-WFDFN 裸露焊盘
包装: 管件
供应商设备封装: 10-DFN(3x3)

LTC3536
1A Low Noise, Buck-Boost
DC/DC Converter
Regulated Output with Input Voltage Above, Below
1.8V to 5.5V Input and Output Voltage Range
1A Continuous Output Current for
±1% Output Voltage Accuracy
Low Noise Buck-Boost Architecture
Up to 95% Efficiency
Programmable Frequency from 300kHz to 2MHz
Synchronizable Oscillator
Burst Mode ? Operation: 32μA I Q
Internal 1ms Soft-Start
Output Disconnect in Shutdown
Shutdown Current: 1μA
Short-Circuit Protection
Small Thermally Enhanced 12-Pin MSOP
Wireless Inventory Terminals
Handheld Medical Instruments
Wireless Locators, Microphones
Supercapacitor Backup Power Supply
FEATURES
n
or Equal to the Output Voltage
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n
V IN ≥ 3V, V OUT = 3.3V
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n
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n
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n
n
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and 10-Pin (3mm × 3mm) DFN Packages
APPLICATIONS
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TYPICAL APPLICATION
DESCRIPTION
The LTC ? 3536 is an extended V IN range, fixed frequency,
synchronous buck-boost DC/DC converter that operates
from input voltages above, below or equal to the regulated
output voltage. The topology incorporated in the LTC3536
provides low noise operation, making it ideal for RF and
precision measurement applications.
The device can produce up to 1A of continuous output
current, and it includes two N-channel and two P-channel
MOSFET switches. Switching frequencies up to 2MHz can
be programmed with an external resistor and the oscilla-
tor can be synchronized to an external clock. Quiescent
current is only 32μA in Burst Mode operation, maximizing
battery life in portable applications. Burst Mode operation
is user controlled and improves efficiency at light loads.
Other features include a 1μA shutdown current, internal
soft-start, overtemperature protection and current limit.
The LTC3536 is available in 12-pin thermally enhanced
MSOP and 10-pin (3mm × 3mm) DFN packages.
L , LT, LTC, LTM, Burst Mode, LTSpice, Linear Technology and the Linear logo are registered
trademarks and PowerPath and No R SENSE are trademarks of Linear Technology Corporation. All
other trademarks are the property of their respective owners.
Efficiency vs Input Voltage
4.7μH
100
95
I LOAD = 200mA
V IN
1.8V TO 5.5V
10μF
PWM BURST
OFF ON
SW1 SW2
V IN V OUT
LTC3536
MODE/SYNC FB
SHDN
RT VC
49.9k
47pF
6.49k
220pF
1000k
V OUT
3.3V
1A FOR V IN ≥ 3V
22μF
90
85
80
75
70
65
I LOAD = 1A
PGND SGND
221k
60
55
3536 TA01a
50
1.5
2
2.5
3
3.5
4
4.5
5
5.5
INPUT VOLTAGE (V)
3536 TA01b
3536fa
1
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