Texas Instruments SLTS025B Data Sheet

查询PT5020供应商 PT5020 Series Positive Input/Negative Output

SLTS025B

Integrated Switching Regulator

(Revised 12/19/2001)

Features Description Negative Output The PT5020 series of integrated Input Voltage Range: switching regulators (ISRs) convert a +4.75 to +7 Volts positive input voltage, typically +5V, to a Laser-Trimmed negative output voltage for a wide range of

Small Footprint analog and datacom applications.

Soft Start These Plus to Minus ISRs incorporate 5-Pin Mount Option a “Buck-Boost” topology and are packaged (Suffixes L & M) in the 3-pin, single in-line pin (SIP)

package configuration.

Pin-Out Information Ordering Information PT Series Suffix (PT1234x)

Pin Function PT5021
= -3.3 Volts

Case/Pin Order Package PT5022
= -5 Volts Configuration Suffix Code *

Standard Application PT5023
= -9 Volts Vertical (EAD)

PT5024
= -12 Volts Horizontal (EAA)

+Vin –Vout Vout

PT5020 PT5025
= -15 Volts

SMD (EAC)

PT5026
= -5.2 Volts Horizontal, 2-pin Tab (EAM) 100µF PT5027
= -8.0 Volts SMD, 2-Pin Tab (EAL) PT5028
= -6.5 Volts * Previously known as package styles 100/110.

COMCOM

PT5029
= -5.5 Volts

(Reference the applicable package code drawing

C1 = Optional ceramic (1-5µF) PT5030
= -6.0 Volts for the dimensions and PC board layout)

C2 = Required Electrolytic (100µF) PT5031
= -1.7 Volts

NOTE: PT5020 ISRs are not Short-Circuit Protected.

Specifications (Unless otherwise stated, Ta =25°C, Vin =5V, Io =Iomax, C2 =100µF)

PT5020 SERIES

Characteristics Symbol Conditions Min Typ Max Units Output Current Io Over Vin range Vo= –1.7V to –6.5V 0.25 (1) 1.0

Vo= –9V 0.10 (1) 0.60

AVo= –12V

Vo= –15V 0.10 (1) 0.30

Input Voltage Range Vin Over Io range 4.75 7 (2) Output Voltage Tolerance ∆Vo Over Vin Range

±1.5 ±3 %Vo Ta = -20°C to SOA limit (3)

Line Regulation Regline Over Vin range ±0.5 ±1 %Vo Load Regulation Regload Iomin ≤ Io ≤ Iomax ±0.5 ±1 %Vo Efficiency Io =0.5 Iomax Vo Ripple (pk-pk) Vr 20MHz bandwidth ±2 ±5 %Vo Transient Response ttr 25% load change µSec

Vo over/undershoot 3.0 5.0 %Vo

Current Limit Ilim %Iomax Inrush Current Iir On start up 1.0 (3)

tir 1.0 m Sec

Switching Frequency ƒs Over Io range Vo =1.7 to 8V 0.8 1.2 MHz

Vo ≥8 V k Hz

Operating Temperature Range Ta -20 +85 (4) °C Thermal Resistance θja Free Air Convection °C/W

(40-60LFM)

Storage Temperature Ts -40 +125 °C Mechanical Shock Per Mil-STD-883D, Method 2002.3

G’s1 msec, Half Sine, mounted to a fixture

Mechanical Vibration Suffixes N, A, & C

G’s Per Mil-STD-883D, 20-2000 Hz

Suffixes L & M

Weight Suffixes N, A, & C 4.5

grams Suffixes L & M

Notes: (1) The ISR will operate at no load with reduced specifications. (2) For applications with input voltages greater than 7 VDC, use the PT78NR100 Series. (3) The inrush current stated is above the normal input current for the associated output load. (4) See Safe Operating Area curves or consult the factory for the appropriate derating (5) The tab pins on the 5-pin mount package types (suffixes L & M) must be soldered. For more information see the applicable package outline drawing.

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