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| 型号： | IRDC3621 |
| 厂商： | International Rectifier |
| 文件页数： | 1/29页 |
| 文件大小： | 0K |
| 描述： | BOARD EVAL DUAL SYNC BUCK CTRLR |
| 产品变化通告： | (EP) Parts Discontinuation 25/May/2012 |
| 标准包装： | 1 |
| 主要目的： | DC/DC，步降 |
| 输出及类型： | 2，非隔离 |
| 输出电压： | 1.8V，2.5V |
| 电流 - 输出： | 10A，10A |
| 输入电压： | 5.5 ~ 14.5 V |
| 稳压器拓扑结构： | 降压 |
| 频率 - 开关： | 400kHz |
| 板类型： | 完全填充 |
| 已供物品： | 板 |
| 已用 IC / 零件： | IR3621 |
| 产品目录页面： | 1383 (CN2011-ZH PDF) |
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Data Sheet No.PD60231 rev B
IR3621 & (PbF)
2-PHASE / DUAL SYNCHRONOUS PWM CONTROLLER WITH
OSCILLATOR SYNCHRONIZATION AND PRE-BIAS STARTUP
FEATURES
Dual Synchronous Controller with 180
Out of Phase Operation
Configurable to 2-Independent Outputs or
Current Share Single Output
Voltage Mode Control
Current Sharing Using Inductor's DCR
Selectable Hiccup or Latched Current
Limit using MOSFET's R DS(on) sensing
Latched Over-Voltage Protection
Pre-Bias Start Up
Programmable Switching Frequency up to 500KHz
Two Independent Soft-Starts/Shutdowns
Precision Reference Voltage 0.8V
Power Good Output
External Frequency Synchronization
Thermal Protection
APPLICATIONS
Embedded Networking & Telecom Systems
Distributed Point-of-Load Power Architectures
2-Phase Power Supply
Graphics Card
DDR Memory Applications
Vin
DESCRIPTION
The IR3621 IC combines a dual synchronous buck control-
ler and drivers, providing a cost-effective, high performance
and flexible solution. The IR3621 operates in 2-Phase mode
to produce either 2-independent output voltages or current
share single output for high current application. The 180
out-of-phase operation allows the reduction of input and
output capacitance.
Other key features include two independently programmable
soft-start functions to allow system level sequencing of out-
put voltages in various configurations. The pre-bias protec-
tion feature prevents the discharge of the output voltage and
possible damage to the load during start-up when a pre-
existing voltage is present at the output. Programmable
switching frequency up to 500KHz per phase allows flexibil-
ity to tune the operation of the IC to meet system level re-
quirements, and synchronization allows the simplification
of system level filter design. Protection features such as
selectable hiccup or latched current limit, and under voltage
lock-out are provided to give required system level security
in the event of a fault condition.
Vin
Rt
Comp1
HDrv1
OCSet1
LDrv1
PGnd1
Rt
Comp1
HDrv1
OCSet1
LDrv1
PGnd1
Vout1
Comp2
IR3621
Vin
Vout
Comp2
IR3621
Vin
SS1 / SD
SS2 / SD
HDrv2
SS1 / SD
HDrv2
Gnd
OCSet2
LDrv2
PGnd2
SS2 / SD
Gnd
OCSet2
LDrv2
PGnd2
Vout2
Current share, single output configuration
2-independent output voltage configuration
Figure 1 - Typical application of IR3621 in current share single output and 2-independent output voltage configuration
ORDERING INFORMATION
PKG
DESIG
M
M
F
F
PART
NUMBER
IR3621M
IR3621MTR
IR3621F
IR3621FTR
LEADFREE
PART NUMBER
IR3621MPbF
IR3621MTRPbF
IR3621FPbF
IR3621FTRPbF
PIN
COUNT
32
32
28
28
PARTS
PER TUBE
73
------
50
------
PARTS
PER REEL
------
6000
------
2500
T&R
Orientation
Fig A
www.irf.com
1
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| IRDC3622D | 功能描述:电源管理IC开发工具 IRDC3622D Eval BRD IRF6629 DIRECTFET RoHS:否 制造商:Maxim Integrated 产品:Evaluation Kits 类型:Battery Management 工具用于评估:MAX17710GB 输入电压: 输出电压:1.8 V |
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| IRDC3628 | 制造商:International Rectifier 功能描述:TUBE / 9999V 999.000A LVIC OTHER |
| IRDC3629 | 功能描述:电源管理IC开发工具 IR3629 Eval BRD 600kHz Controller RoHS:否 制造商:Maxim Integrated 产品:Evaluation Kits 类型:Battery Management 工具用于评估:MAX17710GB 输入电压: 输出电压:1.8 V |
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