Datasheet > 电源电路 > 开关式稳压器或控制器> SP7653ER-L

SP7653ER-L

更新时间： 2024-02-28 19:12:25

品牌	Logo	应用领域
西伯斯 - SIPEX		稳压器开关式稳压器或控制器电源电路开关式控制器
页数	文件大小	规格书
12页	206K
描述
Wide Input Voltage Range, 1.3MHz,Buck Regulator

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技术参数
数据手册

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SP7653ER-L 技术参数

是否Rohs认证：	符合	生命周期：	Transferred
包装说明：	7 X 4 MM, ROHS COMPLIANT, DFN-26	Reach Compliance Code：	unknown
风险等级：	5.76	Is Samacsys：	N
其他特性：	IT IS ALSO OPERATES IN 3 TO 28 VOLT	模拟集成电路 - 其他类型：	SWITCHING REGULATOR
控制模式：	VOLTAGE-MODE	控制技术：	PULSE WIDTH MODULATION
最大输入电压：	5.5 V	最小输入电压：	4.5 V
标称输入电压：	5 V	JESD-30 代码：	R-XDSO-N26
JESD-609代码：	e3	长度：	7 mm
湿度敏感等级：	3	功能数量：	1
端子数量：	26	最高工作温度：	85 °C
最低工作温度：	-40 °C	最大输出电流：	5 A
封装主体材料：	UNSPECIFIED	封装代码：	HVSON
封装形状：	RECTANGULAR	封装形式：	SMALL OUTLINE, HEAT SINK/SLUG, VERY THIN PROFILE
峰值回流温度（摄氏度）：	260	认证状态：	Not Qualified
座面最大高度：	1 mm	表面贴装：	YES
切换器配置：	BUCK	最大切换频率：	1300 kHz
温度等级：	INDUSTRIAL	端子面层：	Matte Tin (Sn)
端子形式：	NO LEAD	端子节距：	0.5 mm
端子位置：	DUAL	处于峰值回流温度下的最长时间：	40
宽度：	4 mm	Base Number Matches：	1

SP7653ER-L 数据手册

PIN DESCRIPTION

Pin #

Pin Name

Description

1-3

P_GND

Ground connection for the synchronous rectifier

Ground Pin. The control circuitry of the IC and lower power driver are

referenced to this pin. Return separately from other ground traces to the (-)

4,8,19-21

GND

V_FB

terminal of C_OUT

Feedback Voltage and Short Circuit Detection pin. It is the inverting input

of the Error Amplifier and serves as the output voltage feedback point for

the Buck Converter. The output voltage is sensed and can be adjusted

through an external resistor divider. Whenever V drops 0.25V below the

positive reference, a short circuit fault is detected^Fa^Bnd the IC enters hiccup

mode.

Output of the Error Amplifier. It is internally connected to the inverting input

of the PWM comparator. An optimal filter combination is chosen and

connected to this pin and either ground or V_FBto stabilize the voltage

mode loop.

COMP

UVLO input for Vin voltage. Connect a resistor divider between V_INand

UV_INto set minimum operating voltage.

UVIN

Soft Start. Connect an external capacitor between SS and GND to set the

soft start rate based on the 10µA source current. The SS pin is held low

via a 1mA (min) current during all fault conditions.

Input connection to the high side N-channel MOSFET. Place a decoupling

10-13

V_IN

capacitor between this pin and P_GND

14-16,23-26

Connect an inductor between this pin and V_OUT

No Connect

THEORY OF OPERATION

General Overview

The SP7653 is a fixed frequency, voltage mode,

synchronousPWMregulatoroptimizedforhigh

efficiency. The part has been designed to be

especially attractive for high input voltages of

2.5V to 20V.

The SP7653 contains two unique control fea-

tures that are very powerful in distributed appli-

cations. First, asynchronous driver control is

enabled during start up, to prohibit the low side

switch from pulling down the output until the

high side switch has attempted to turn on. Sec-

ond, a 100% duty cycle timeout ensures that the

low side switch is periodically enhanced during

extended periods at 100% duty cycle. This guar-

antees the synchronized refreshing of the Boost

capacitor during very large duty ratios.

The heart of the SP7653 is a wide bandwidth

transconductance amplifier designed to accom-

modate Type II and Type III compensation

schemes. Aprecision0.8Vreference, presenton

the positive terminal of the error amplifier per-

mits the programming of the output voltage

down to 0.8V via the V_FBpin. The output of the

error amplifier, COMP, compared to a 1.1V

peak-to-peak ramp is responsible for trailing

edge PWM control. This voltage ramp, and

PWM control logic are governed by the internal

oscillator that accurately sets the PWM fre-

quency to 1.3MHz.

The SP7653 also contains a number of valuable

protection features. Programmable V_INUVLO

allowstheusertosettheexactvalueatwhichthe

conversion voltage can safely begin down con-

version, and an internal V_CCUVLO which en-

sures that the controller itself has enough volt-

age to properly operate. Other protection fea-

Date: 03/25/05

SP7653 Wide Input Voltage Range, 1.3MHz, Buck Regulator

1 2 345 6 7...12

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