Datasheet > LM34930

LM34930

更新时间： 2024-09-19 02:58:19

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1A Constant On-Time Buck Switching Regulator with Intelligent Current

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LM34930 数据手册

LM34930

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SNVS571B –MAY 2008–REVISED APRIL 2013

Ultra Small 33V, 1A Constant On-Time Buck Switching Regulator with Intelligent Current

Limit

Check for Samples: LM34930

FEATURES

DESCRIPTION

The LM34930 constant On-Time Step Down

Switching Regulator features all the functions needed

to implement a low cost, efficient, buck bias regulator

capable of supplying in excess of 1A load current.

This high voltage regulator contains an N-Channel

Buck Switch, and is available in a DSBGA bumped

package. The constant on-time regulation principle

requires no loop compensation, results in fast load

•

Operating Input Voltage Range: 8V to 33V

Input Over-Voltage Shutdown at 36V

Input Absolute Maximum Rating of 44V

Integrated 1A N-Channel Buck Switch

Adjustable Output Voltage From 2.5V

Switching Frequency Adjustable to 2 MHz

•

transient

response,

and

simplifies

circuit

Switching Frequency Remains Nearly

implementation. The operating frequency remains

constant with line and load. The valley current limit

results in a smooth transition from constant voltage to

constant current mode when current limit is detected

without the use of current limit foldback. To reduce

the possibility of saturating the inductor the valley

current limit threshold reduces as the input voltage

increases, and the on-time is reduced when current

limit is detected. Additional features include: Over-

voltage indicator, Input over-voltage shutdown, Vcc

under-voltage lock-out, thermal shutdown, and

maximum duty cycle limiting.

Constant With Load Current and Input Voltage

•

Ultra-Fast Transient Response

No Loop Compensation Required

Adjustable Soft-Start Timing

Thermal Shutdown

Precision 2% Feedback Reference

Input Over-Voltage Indicator at 19V

Current Limit Scheme Helps Prevent Inductor

From Saturation in Load Fault Conditions

PACKAGE

•

DSBGA-12, 1.77 mm x 2.1 mm

Typical Application, Basic Step-Down Regulator

8V - 33V

Input

VIN

BST

LM34930

OUT

ISEN

nOV

VCC

GND

Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of

Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.

All trademarks are the property of their respective owners.

PRODUCTION DATA information is current as of publication date.

Products conform to specifications per the terms of the Texas

Instruments standard warranty. Production processing does not

necessarily include testing of all parameters.

12 3 4 5 6 7...24

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与LM34930相关器件

型号	品牌	获取价格	描述	数据表
LM34930TL	NSC	获取价格	Ultra Small 33V, 1A Constant On-Time Buck Switching Regulator with Intelligent Current Lim
LM34930TL/NOPB	TI	获取价格	Ultra Small 33V, 1A Constant On-Time Buck Switching Regulator with Intelligent Current Lim
LM34930TLX	NSC	获取价格	Ultra Small 33V, 1A Constant On-Time Buck Switching Regulator with Intelligent Current Lim
LM34936	TI	获取价格	30V 宽输入电压同步 4 开关降压/升压控制器
LM34936-Q1	TI	获取价格	汽车类、30V 宽输入电压同步 4 开关降压/升压控制器
LM34936QPWPRQ1	TI	获取价格	汽车类、30V 宽输入电压同步 4 开关降压/升压控制器 \| PWP \| 28 \| -40
LM34936QPWPTQ1	TI	获取价格	汽车类、30V 宽输入电压同步 4 开关降压/升压控制器 \| PWP \| 28 \| -40
LM34936RHFR	TI	获取价格	30V 宽输入电压同步 4 开关降压/升压控制器 \| RHF \| 28 \| -40 to
LM34936RHFT	TI	获取价格	30V 宽输入电压同步 4 开关降压/升压控制器 \| RHF \| 28 \| -40 to
LM34937	TI	获取价格	Wide Input Range Synchronous Buck Controller

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