概述
数据手册EUP3427 概述
4A, Synchronous Step-Down Converter 4A，同步降压型转换器
EUP3427 数据手册
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4A, Synchronous Step-Down Converter
DESCRIPTION
FEATURES
The EUP3427 is a 1 MHz fixed frequency synchronous,
current-mode, step-down dc-dc converter capable of
providing up to 4A output current. The EUP3427
operates from an input range of 2.7V to 5.5V and
provides a regulated output voltage from 0.6V to 5V.
The internal synchronous power switch improves
efficiency and eliminates the need for an external
Schottky diode. The EUP3427 can be externally set for
either forced PWM continuous mode or pulse skipping
mode. Forced PWM operation provides very low output
ripple voltage for noise sensitive applications while
pulse skipping operation improves light load efficiency
by reducing switching loss.
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2.7V to 5.5V Input Voltage Range
High Efficiency up to 96%
4A Available Load Current
57/35mꢀ Integrated PFET/NFET Switches
1MHz Switching Frequency
100% Duty Cycle Low Dropout Operation
Short Circuit and Thermal Protection
Integrated UVLO and Power Good
Excellent Line and Load Transient Response
Available in SOP-8 (EP) and TDFN-10 Packages
RoHS Compliant and 100% Lead(Pb)-Free
Halogen-Free
The EUP3427 features short circuit and thermal
protection circuits to improve system reliability.
Internally soft-start avoids input inrush current during
startup. The EUP3427 is available in SOP-8 package
with the exposed pad and TDFN-10 package.
APPLICATIONS
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High Performance DSPs, FPGAs, ASICs and
Microprocessors
Base Station, Telecom, and Networking
Equipment Power Supplies
ePC and NetPCs
Typical Application Circuit
Figure1. SOP-8(EP) Typical Application Circuit
DS3427 Ver1.0 Jul. 2011
1
EUP3427
Typical Application Circuit (continued)
Figure2. TDFN-10 Typical Application Circuit
Pin Configurations
Package
Type
Package
Type
Pin Configurations
Pin Configurations
SOP-8 (EP)
TDFN-10
Pin Description
PIN
SOP-8 (EP) TDFN-10
DESCRIPTION
Switch node connected to inductor. This pin is connected to the drains of the
internal main and synchronous power MOSFET switches.
Operation Mode Select Input. Logic high selects pulse skipping mode, and
logic low or floating chooses forced PWM mode. An internal 5ꢁA current pull
it down to ground.
Chip enable pin. Forcing this pin above 1.5V enables the part. Forcing this pin
below 0.3V or floating it shuts down the device.An internal 600kꢀ Resistor
pulls it down to ground.
LX
1
2,3
SKIP
EN
2
7
3
4
5
4
Power good output signal. Logic high when regulator output is within ±10%
of target output voltage. A pull-up resistor of 10kꢀ to 100kꢀ is recommended
for most applications.
PG
AGND
FB
5
6
7
8
-
-
6
Analog ground.
Feedback pin. Connect it to an external resistor divider to set output voltage.
PVIN
PGND
SVIN
NC
9,10
-
Power supply input.
Power ground.
8
Analog input supply which is connected to PVIN through a low pass RC filter.
No connect.
-
1
Thermal
Pad
-
-
Ground.( Thermal pad must be connected to the ground of PCB.)
2
DS3427 Ver1.0 Jul. 2011
EUP3427 相关器件
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| EUP3451 | EUTECH | 3A,30V,500KHz Step-Down Converter | 获取价格 |
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| EUP3453 | EUTECH | 3A,40V,200KHz Step-Down Converter | 获取价格 |
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| EUP3458 | EUTECH | 1.2A,30V,1.2MHz Step-Down Converter | 获取价格 |
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| EUP3475 | EUTECH | 3A, 28V, 1MHz Synchronous Step-Down Converter | 获取价格 |
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| EUP3475A | EUTECH | 3A, 28V, 1MHz Synchronous Step-Down Converter | 获取价格 |
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| EUP3476 | EUTECH | 3A, 28V, 500kHz Synchronous Step-Down Converter | 获取价格 |
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| EUP3476A | EUTECH | 3A, 28V, 500kHz Synchronous Step-Down Converter | 获取价格 |
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| EUP3482 | EUTECH | 2A, 30V, 340KHz Synchronous Step-Down Converter | 获取价格 |
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| EUP3484 | EUTECH | 3A, 30V, 340KHz Synchronous Step-Down Converter | 获取价格 |
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