Datasheet > ADP1148-3.3

ADP1148-3.3

更新时间： 2022-01-19 07:01:00

品牌	Logo	应用领域
其他 - ETC		稳压器开关
页数	文件大小	规格书
16页	277K
描述
High Efficiency Synchronous Step-Down Switching Regulators(273.94 k)

阅读下载

获取价格

数据手册

如果您发现信息不准确，欢迎纠错

ADP1148-3.3 数据手册

ADP1148, ADP1148-3.3, ADP1148-5

PIN DESCRIPTION

Pin # Mnemonic

Function

P-Channel Drive High Current Gate Drive for Top P-Channel MOSFET. The voltage swing at Pin 4 is from V_INto

ground.

V_IN

C_T

No Connection.

Input Voltage.

External Capacitor C_Tfrom Pin 4 to Ground Sets the Operating Frequency. The frequency is also

dependent on the ratio V_OUT/V_IN.

Int V_CC

Internal Supply Voltage, Nominally 3.3 V. Must be decoupled to signal ground. Do not externally load

this pin.

I_TH

Error Amplifier Decoupling Point. The current comparator threshold increases with the Pin 7 voltage.

Sense–

Connects to internal resistive divider that sets the output voltage in ADP1148-3.3 and ADP1148-5

versions. Pin 7 is also the (–) input for the current comparator.

Sense+

V_FB

The (+) Input for the Current Comparator. A built-in offset between Pins 7 and 8, in conjunction with

R_SENSE, sets the current trip threshold.

For the ADP1148 adjustable version, Pin 9 serves as the feedback pin from an external resistive divider

used to set the output voltage. On ADP1148-3.3 and ADP1148-5 versions, this pin is not used.

Shutdown

Taking Pin 10 of the ADP1148, ADP1148-3.3 or ADP1148-5 high holds both MOSFETs off. Must be

at ground potential for normal operation.

Signal GND

Power GND

Small Signal Ground. Must be routed separately from other grounds to the (–) terminal of C_OUT

Driver Power Ground. Connects to source of N-channel MOSFET and the (–) terminal of C_IN.

No Connection.

N-Channel Drive High Current Drive for bottom N-channel MOSFET. The voltage swing at Pin 13 is from ground to

V_IN.

PIN CONFIGURATIONS

14-Lead Plastic DIP

14-Lead Plastic SO

P DRIVE

N DRIVE

POWER GND

SIGNAL GND

SHUTDOWN

ADP1148

TOP VIEW

(Not to Scale)

INT V

SENSE(–)

SENSE(+)

NC = NO CONNECT

*FIXED OUTPUT VERSIONS = SD1

CAUTION

ESD (electrostatic discharge) sensitive device. Electrostatic charges as high as 4000 V readily

accumulate on the human body and test equipment and can discharge without detection. Although

the ADP1148, ADP1148-3.3, ADP1148-5 feature proprietary ESD protection circuitry, permanent

damage may occur on devices subjected to high energy electrostatic discharges. Therefore, proper

ESD precautions are recommended to avoid performance degradation or loss of functionality.

WARNING!

ESD SENSITIVE DEVICE

REV. 0

–4–

1 2 345 6 7...16

下载PDF

与ADP1148-3.3相关器件

型号	品牌	描述	获取价格	数据表
ADP1148-5	ADI	High Efficiency Synchronous Step-Down Switching Regulators	获取价格
ADP1148AN	ADI	High Efficiency Synchronous Step-Down Switching Regulators	获取价格
ADP1148AN-3.3	ADI	Current-Mode SMPS Controller	获取价格
ADP1148AN-3.3	ROCHESTER	SWITCHING CONTROLLER, 250 kHz SWITCHING FREQ-MAX, PDIP14, PLASTIC, DIP-14	获取价格
ADP1148AN-33	ADI	High Efficiency Synchronous Step-Down Switching Regulators	获取价格
ADP1148AN-5	ADI	High Efficiency Synchronous Step-Down Switching Regulators	获取价格