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PT5071 Datasheet(PDF) 1 Page - Texas Instruments

Part No. PT5071
Description  1.5 Amp, 12V Step-Up/Step-Down Integrated Switching Regulator
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Maker  TI [Texas Instruments]
Homepage  http://www.ti.com
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PT5071 Datasheet(HTML) 1 Page - Texas Instruments

   
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For technical support and more information, see inside back cover or visit www.ti.com/powertrends
PT5071—12V
1.5 Amp, 12V Step-Up/Step-Down
Integrated Switching Regulator
SLTS139
(Revised 2/7/2001)
Standard Application
C1, C2 = Required 100µF electrolytic (See footnotes)
Ordering Information
PT5071
¨ = +12 Volts
PT Series Suffix (PT1234X)
Case/Pin
Configuration
Vertical Through-Hole
N
Horizontal Through-Hole
A
Horizontal Surface Mount
C
Pin
Function
1
N/C
2
UVLO Adj
3
STBY*
4Vin
5Vin
6Vin
7
GND
8
GND
9
GND
10
GND
11
Vout
12
Vout
13
Vout
14
Vout Adjust
Features
Single-Device:
+12V Output, 7-16V Input
84% Efficiency
14-Pin Excalibur™ Package
Output Current Limit
Adjustable Output Voltage
Adjustable Undervoltage Lockout
Solderable Copper Case
Description
The PT5071 is a 1.5-ampere rated step-up/
step-down Integrated Switching Regulator
(ISR) that provides a tightly regulated 12V
output voltage from a 7V to 16V variable
input source. This high-performance ISR has
applications in systems where the input
voltage straddles the desired 12V output.
The regulator has an adjustable output
voltage and input start-up threshold, and a
standby function for power conservation.
Pin-Out Information
C
1
+
C
2
+
PT5071
UVadj
GND
V
IN
V
OUT
V
0 adj
STBY*
4-6
11-13
2
37-10
14
V
IN
V
OUT
STBY
GND
GND
UV
ADJ
(For dimensions and PC board layout,
see Package Styles 1360 and 1370.)
For Inhibit pin:
Open = output enabled
Ground = output disabled
Specifications
Characteristics
PT5071
(T
a = 25°C unless noted)
Symbols
Conditions
Min
Typ
Max
Units
Output Current
Io
Over Vin Range
0.1 (1)
—1.5
A
Current Limit
Ilim
Vin = 12V
4.0
A
Input Voltage Range
Vin
0.1A
≤ Io≤Iomax
7.0
16.0
V
Output Voltage Tolerance
∆Vo
Vin =12V, Io =Iomax
±1.0
%
–40°C
≤ Ta ≤ +85°C
Output Voltage Adjust Range
Voadj
10
15
V
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
200
µSec
with C2 = 100µF
Vos
Vo over/undershoot
1.0
%Vo
Efficiency
η
Vin =12V, Vo=12V, Io =1.5A
83
%
Switching Frequency
ƒo
Over Vin Range
550
kHz
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
25
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 250m
Ω @100kHz. In addition, C
1 and C2 must be rated to a minimum of 300mArms ripple current.


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