参数资料
| 型号： | LTC3428EDD#TRPBF |
| 厂商： | Linear Technology |
| 文件页数： | 1/12页 |
| 文件大小： | 0K |
| 描述： | IC REG BOOST ADJ 4A 10DFN |
| 标准包装： | 2,500 |
| 类型： | 升压（升压） |
| 输出类型： | 可调式 |
| 输出数： | 1 |
| 输出电压： | 1.6 V ~ 5.25 V |
| 输入电压： | 1.6 V ~ 4.5 V |
| PWM 型： | 电流模式 |
| 频率 - 开关： | 1MHz |
| 电流 - 输出： | 4A |
| 同步整流器： | 无 |
| 工作温度： | -40°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 10-WFDFN 裸露焊盘 |
| 包装： | 带卷 (TR) |
| 供应商设备封装： | 10-DFN（3x3） |
LTC3428
4A, 2MHz Dual Phase
Step-Up DC/DC Converter
in 3mm × 3mm DFN
FEATURES
DESCRIPTION
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High Ef?ciency: Up to 92%
2-Phase Control Reduces Output Voltage Ripple
5V at 2A from 3.3V Input
3.3V at 1.5A from 1.8V Input
1.6V to 5.25V Adjustable Output Voltage
1.6V to 4.5V Input Range
Internal Soft-Start Operation
Low Shutdown Current: <1μA
Uses Small Surface Mount Components
10-Pin 3mm × 3mm DFN Package
The LTC ? 3428 is a 2-phase, current mode boost con-
verter, capable of supplying 2A at 5V from a 3.3V input.
Two 93mΩ, 2A N-channel MOSFET switches allow the
LTC3428 to deliver high ef?ciency from input voltages as
low as 1.6V.
External parts count and size are minimized by a 1MHz
switching frequency and a 2-phase design. Two phase
operation signi?cantly reduces peak inductor currents and
capacitor ripple current, doubling the effective switching
frequency and minimizing inductor and capacitor size.
APPLICATIONS
External compensation allows the feedback loop response
to be optimized for a particular application.
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Networking Equipment
Handheld Instruments
Digital Cameras
Distributed Power
Local 3.3V to 5V Conversion
Other features include: an active low shutdown pin re-
duces supply current to below 1μA, internal soft-start,
antiringing control and thermal shutdown. The LTC3428
is available in a low pro?le (0.75mm) 10-lead (3mm ×
3mm) DFN package.
L , LT, LTC and LTM are registered trademarks of Linear Technology Corporation. All other
trademarks are the property of their respective owners.
TYPICAL APPLICATION
V IN
3.3V
3.3V to 5V at 2A Converter
95
90
Ef?ciency vs Load Current
4.7μF***
10k
OFF ON
22pF
V IN
SHDN
V C
AGND
LTC3428
V OUT
SWA
SWB
FB
2.2μH*
2.2μH*
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V OUT
5V/2A
383k
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75
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65
60
1000pF
PGNDA PGNDB
* TOKO FDV06302R2
** PHILIPS PMEG1020
*** TAIYO YUDEN X5R JMK212BJ475MD
**** TAIYO YUDEN X5R JMK316BJ226ML
22μF****
3428 TA01
121k
55
50
45
0.1
LOAD CURRENT (A)
V IN = 3.3V
V OUT = 5V
L = 2.2μH
1
2
3428 TA02
3428fb
1
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