Texas Instruments PT6400 Series Data Sheet User Manual

查询PT6405D供应商

PT6400 Series 3 Amp 5V Input Adjustable

SLTS032A

Integrated Switching Regulator

(Revised 6/30/2000)

Single-Device 5V to 3V Power allows easy integration of low-power 85% Efficiency 3.3V logic IC’s into existing 5V systems without redesigning the central power

Small SIP Footprint

supply. Only two external capacitors are

Adjustable Output Voltage

required for proper operation. The out- put voltage is easily adjustable with one

The PT6400 is a high performance

external resistor. The PT6406,7,8 can

+5V to +3.3V, 3 Amp, 12-Pin SIP

be used to terminate high-speed data

(Single In-line Package) Integrated

buses such as Futurebus (+2.1V) or the

Switching Regulator (ISR) designed

new GTL (+1.2V) logic buses.

for stand alone (not parallelable) op-

Please note that this product does

eration. This high-performance ISR

not include short circuit protection.

Pin-Out Information Ordering Information PT Series Suffix (PT1234X) Pin Function PT6404 = +1.5 Volts

Case/Pin Do not connect PT6405 = +3.3 Volts Configuration Vin PT6406 = +1.8 Volts Vertical Through-Hole PT6407 = +2.1 Volts Horizontal Through-Hole

Standard Application

PT6408 = +1.2 Volts Horizontal Surface Mount

PT6409 = +2.5 Volts

VIN 9,10,11 VOUT2,3,4 GND

PT6400

R1 GND (V UP)

100µF 100µF GND

R2 (V DOWN) GND Pkg Style 300

COM COM

Vout PT6400

Note: Back surface C1 = Required 100µF electrolytic Vout of product is conducting metal.

C2 = Required 100µF electrolytic

Vout Vout Adjust

Specifications

PT6400 SERIES

Characteristics (Ta = 25°C unless noted) Symbols Conditions Min Typ Max Units Output Current Io 4.5V ≤ Vin ≤ 5.5V 0.1* 3.0 Current Limit Icl Vin = +5V 3.6 5.0 Input Voltage Range Vin 0.1A ≤ Io ≤ 3.0A 4.5 5.5 Output Voltage Tolerance ∆Vo Vin = +5V, Io = 3.0A

Vo-0.05 Vo+0.05 V0°C ≤ Ta ≤ +70°C

Line Regulation Regline 4.5V ≤ Vin ≤ 5.5V, Io = 3.0A ±10 ±25 m V Load Regulation Regload Vin = +5V, 0.3 ≤ Io ≤ 3.0A ±10 ±25 m V Vo Ripple/Noise Vn Vin = 5V, Io = 3.0A m V Transient Response ttr Io step between 1.5A and 3.0A µSec with C2 = 100µF Vos Vo over/undershoot m V Efficiency Vin = +5V, Io = 1.5A Vo= 3.3V

Vo= 1.8V Vo= 2.1V Vo= 1.2V

Switching Frequency ƒo 4.5V ≤ Vin ≤ 5.5V

k Hz0.3A ≤ Io ≤ 3.0A

Absolute Maximum Ta +85 °C Operating Temperature Range Recommended Operating Ta Free Air Convection (40-60 LFM)

+ 70** °CTemperature Range

At Vin= 5V, Io=2.5A

Thermal Resistance θja Free Air Convection (40-60 LFM) °C/W Storage Temperature Ts -40 +125 °C Mechanical Shock Per Mil-STD-883D, Method 2002.3 , 1 msec,

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

Weight 6.5 grams *ISR will operate down to no load with reduced specifications **See Thermal Derating chart. Note: The PT6400 Series requires two 100µF electrolytic or tantalum capacitors for proper operation in all applications.

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