TI Texas Instruments SLTS139 Data Handbook1/Instructions

查询PT5071供应商 PT5071—12V 1.5 Amp, 12V Step-Up/Step-Down

SLTS139

Integrated Switching Regulator

(Revised 2/7/2001)

Features Description Single-Device: The PT5071 is a 1.5-ampere rated step-up/ +12V Output, 7-16V Input step-down Integrated Switching Regulator 84% Efficiency (ISR) that provides a tightly regulated 12V 14-Pin Excalibur™ Package output voltage from a 7V to 16V variable Output Current Limit input source. This high-performance ISR has Adjustable Output Voltage applications in systems where the input Adjustable Undervoltage Lockout voltage straddles the desired 12V output. Solderable Copper Case The regulator has an adjustable output

voltage and input start-up threshold, and a standby function for power conservation.

Pin-Out Information Ordering Information Pin Function PT5071¨ = +12 Volts N/C

Standard Application

UVLO Adj

PT Series Suffix (PT1234X)

STBY*

Case/Pin

Configuration

UVadj

IN Vertical Through-Hole

PT5071 Vin Horizontal Through-Hole

IN OUT

GND Horizontal Surface Mount

GND 0adj STBY*

7-10 GND

(For dimensions and PC board layout, see Package Styles 1360 and 1370.)

GND GND Vout Vout

For Inhibit pin:

C1, C2 = Required 100µF electrolytic (See footnotes) Open = output enabled

Vout Adjust Ground = output disabled

Specifications

Characteristics PT5071

(Ta = 25°C unless noted) Symbols Conditions Min Typ Max Units Output Current Io Over Vin Range 0.1 (1) 1.5 Current Limit Ilim Vin = 12V 4.0 Input Voltage Range Vin 0.1A ≤ Io ≤ Iomax 7.0 16.0 Output Voltage Tolerance ∆Vo Vin =12V, Io =Iomax ±1.0

–40°C ≤ Ta ≤ +85°C

Output Voltage Adjust Range Voadj Line Regulation Regline Over Vin Range, Io =Iomax ±0.5 Load Regulation Regload Vin =12V, 0.1 ≤ Io ≤ Iomax ±0.5 Vo Ripple/Noise Vn Vin =12V, Io =Iomax ±2.0 ±3.0

Transient Response ttr Load step from 50% to 100% Iomax, Vin=12V µSec

with C2 = 100µF Vos Vo over/undershoot 1.0 %Vo Efficiency Vin =12V, Vo=12V, Io =1.5A

Switching Frequency ƒo Over Vin Range k Hz 0.1A ≤ Io ≤ Iomax Absolute Maximum Ta Over Vin range –40 (2) +85 (3) °C

Operating Temperature Range Storage Temperature Ts –40 +125 °C Mechanical Shock Per Mil-STD-883D, Method 2002.3 , 1 msec, TBD G’s

Half Sine, mounted to a fixture

Mechanical Vibration Per Mil-STD-883D, Method 2007.2,

20-2000 Hz, Soldered in a PC board TBD G’s

Weight grams Notes: 1. The regulator will operate down to no load with reduced specifications. 2. For operating temperatures below 0°C, it is recommended that tantalum capacitors be used at both the input and output. 3. See SOA curves, or contact the factory for derating guidelines. Input/Output Capacitors: The PT5071 regulator requires a 100µF electrolytic capacitor at the input and output for proper operation in all applications. The ESR (equivalent series resistance) of both capacitors must be less than 250mΩ @100k Hz. In addition, C1 and C2 must be rated to a minimum of 300m Arms ripple current.

For technical support and more information, see inside back cover or visit www.ti.com/powertrends