PT6670 Series
5V/3.3V Input 20W Boost
Integrated Switching Regulator
SLTS039A
(Revised 6/30/2000)
•
Input Voltage Range:
3.1 to 3.6V
4.5 to 5.5V
Adjustable Output Voltage
85% Efficiency
Remote Sense Capability
Soft Start
The PT6670 is a series of high-output
Integrated Switching Regulators (ISRs)
designed to provide a voltage boost
function. Housed in a 14-Pin SIP (Single
In-line Package), the PT6670 series
incorporates regulators for either a +3.3V
or +5.0V input and provide output voltages
from +5V to +12V. Applications include
power for auxilliary circuits requiring
up to 20W.
•
•
•
•
Pin-Out Information
Ordering Information
+3.3V Input +5V Input
Vout
Pin Function
Pin Function
1
2
3
4
5
6
Remote Sense
Do not connect
Do not connect
Vin
Vin
Vin
8
9
GND
GND
GND
Vout
Vout
Vout
PT6671
PT6672
PT6673
—
PT6675
PT6674
+5.0 Volts
+9.0 Volts
+12.0 Volts
10
11
12
13
14
Standard Application
VOAdjust
REMOTE SENSE
14
1
V
out Adjust
7
GND
VIN
VOUT
PT Series Suffix
(PT1234X)
4,5,6
11,12,13
PT6670
Case/Pin
Configuration
Heat
Spreader
7,8,9,10
+
+
LOAD
C1
C2
Vertical Through-Hole
Horizontal Through-Hole
Horizontal Surface Mount
P
D
E
Pkg Style 400
GND
GND
Note:
Back surface is
conducting metal.
(1)
C1 = Required 560µF electrolytic
C2 = Required 560µF electrolytic
PT6670
(1)
Preliminary Specifications
PT6670 SERIES
Characteristics
(Ta = 25°C unless noted)
Symbols
Conditions
Min
Typ
Max
Units
Output Current
Io
Ta = 60°C, 200 LFM, pkg P
Ta = 25°C, natural convection
0.1
0.1
0.1
0.1
0.1
0.1
—
—
—
—
—
—
TBD
4.0
PT6671
PT6672
PT6673
PT6674
PT6675
1.67
1.25
2.0
A
3.0
Input Voltage Range
Vin
Over Vo and Io range
On start-up
PT6671/2/3
PT6674/5
3.1
4.5
3.3
5.0
3.6
5.5
V
A
Inrush Current
Iir
—
—
TBD
Output Voltage Tolerance
∆Vo
Vin =Vin(TYP), Io = Iomax
Ta = 0°C to 65°C
—
1.5
—
%Vo
Output Voltage Adjust Range
Voadj
Pin 14 to Vo or ground
PT6671
PT6672/5
PT6673/4
3.8
8.2
9.6
—
—
—
5.5
9.2
V
12.8
Line Regulation
Load Regulation
Vo Ripple/Noise
Regline
Regload
Vn
Over Vin range, Io = Iomax
Vin =Vin(TYP), 0.1 ≤ Io ≤ Iomax
Vin =Vin(TYP), Io = Iomax
—
—
—
0.25
0.25
0.5
0.5
—
%Vo
%Vo
%Vo
3
Transient Response
with C1= C2= 560µF
ttr
Vos
Io step between ½Iomax and Iomax
Vo over/undershoot
—
—
500
5
—
—
µSec
%Vo
Efficiency
η
Vin = Vin(TYP), Io = ½Iomax
PT6671
PT6672
PT6673
PT6675
PT6674
—
—
—
—
—
85
84
83
88
87
—
—
—
—
—
%
Vin =Vin(TYP), Io = Iomax
PT6671
PT6672
PT6673
PT6675
PT6674
—
—
—
—
—
82
80
82
87
86
—
—
—
—
—
%
(Continued)
For technical support and more information, see inside back cover or visit www.ti.com/powertrends
TI [ TEXAS INSTRUMENTS ]
