For assistance or to order, call (800) 531-5782
P T 6 3 2 0 S e r i e s
SLTS065
(Revised 6/4/98)
3 AMP ADJUSTABLE LOW VOLTAGE INPUT
INTEGRATED SWITCHING REGULATORS
• Low Voltage Input (7V)
• 90% Efficiency
• Adjustable Output Voltage
• Internal Short Circuit Protection
• Over-Temperature Protection
• On/Off Control (Ground Off)
Regulators (ISRs). These ISRs are de-
signed with premium low threshold FETs
for those applications requiring very low
input/output voltage differentials such as
battery powered equipment. This high-
performance ISR family offers a unique
combination of features combining 90%
typical efficiency with open-collector on/
off control and adjustable output voltage.
Quiescent current in the shutdown mode
is less than 100µA.
The PT6320 series is a low volt-
age input (typically 7V) version of
Power Trends’ high-performance
3A, 12 pin SIP Integrated Switching
Pin-Out Information
Ordering Information
PT 6322! = +5 Volts
PT 6323! = +3.3 Volts
PT Series Suffix
Case/Pin
Configuration
(PT1234X)
Pin Function
Inhibit
1
(30V max)
Vertical Through-Hole
N
A
C
2
3
Vin
Vin
Standard Application
VOADJ
Horizontal Through-Hole
Horizontal Surface Mount
12
4
Vin
VIN
VOUT
5
GND
GND
GND
GND
Vout
2,3,4
9,10,11
PT6320
1
6
7
Pkg Style 200
5,6,7,8
+
PT6320
C1
C2
INH
Q1
8
9
GND
GND
C1 = Optional 1µF ceramic
C2 = Required 100µF electrolytic
Q1 = NFET
10
11
12
Vout
Vout
Vout Adj
Specifications
PT6320 SERIES
Characteristics
(T =25°C unless noted)
a
Symbols
Conditions
Min
Typ
Max
Units
Output Current
Io
Isc
Vin
Over Vin range
Vin = Vo + 5V
0.1 ≤ Io ≤ 3.0 A
0.1*
—
—
5.0
3.0
—
A
Apk
Short Circuit Current
Input Voltage Range
Vo = 3.3V
Vo = 5V
7
7
—
—
26
V
V
(Note: inhibit function cannot be used above 30V.)
30/38**
Output Voltage Tolerance
∆Vo
Over Vin Range, Io = 3.0 A
Ta = 0°C to +60°C
—
1.0
2.0
%Vo
Line Regulation
Load Regulation
Vo Ripple/Noise
Regline
Regload
Vn
Over Vin range
0.1 ≤ Io ≤ 3.0 A
—
—
—
0.25
0.25
2
0.5
0.5
—
%Vo
%Vo
%Vo
Vin = Vin min, Io = 3.0A
Transient Response
with Co = 100µF
ttr
50% load change
—
—
100
200
—
µSec
%Vo
Vos
Vo over/undershoot
5.0
Efficiency
η
Vin=9V, Io = 0.5 A, Vo = 3.3V
Vin=9V, Io = 0.5 A, Vo = 5V
—
—
84
89
—
—
%
%
Switching Frequency
Shutdown Current
Quiescent Current
ƒo
Isc
Inl
Vo
Over Vin and Io ranges
Vin = 15V
Io = 0A, Vin =10V
400
—
—
500
100
10
600
—
—
kHz
µA
mA
Output Voltage
Below Vo
Above Vo
See Application Notes.
Adjustment Range
Absolute Maximum
Ta
Ta
-40
-40
—
—
+85
°C
Operating Temperature Range
Recommendated Operating
Temperature Range
Free Air Convection, (40-60LFM)
At Vin = 24V, Io = 2.5A
+80***
°C
Thermal Resistance
Storage Temperature
Mechanical Shock
θja
Free Air Convection (40-60LFM)
—
—
30
—
—
°C/W
Ts
-40
+125
—
°C
Per Mil-STD-883D, Method 2002.3, 1 msec,
Half Sine, mounted to a fixture
—
500
G’s
Mechanical Vibration
Per Mil-STD-883D, Method 2007.2,
20-2000 Hz,Soldered in a PC board
—
—
10
—
—
G’s
Weight
—
—
6.5
grams
*
ISR will operate to no load with reduced specifications.
** Input voltage cannot exceed 30V when the inhibit function is used. *** See Thermal Derating chart.
Note: The PT6320 Series requires a 100µF electrolytic or tantalum output capacitor for proper operation in all applications.
8
Power Trends, Inc. 27715 Diehl Road, Warrenville, IL 60555 (800) 531-5782 Fax: (630) 393-6902 http://www.ti.com/powertrends