PT6400 Datasheet, PDF (1/5 Pages) Texas Instruments – 3 AMP ADJUSTABLE INTEGRATED SWITCHING REGULATOR

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PT6400
Series
3 AMP ADJUSTABLE
INTEGRATED SWITCHING REGULATOR
Application Notes
Mechanical Outline
Product Selector Guide
Revised 5/15/98
• Single-Device 5V to 3V Power
• 85% Efficiency
• Small SIP Footprint
• Adjustable Output Voltage
The PT6400 is a high performance
+5V to +3.3V, 3 Amp, 12-Pin SIP (Single
In-line Package) Integrated Switching
Regulator (ISR) designed for stand alone
(not parallelable) operation. This high-
performance ISR allows easy integration
of low-power 3.3V logic IC’s into existing
5V systems without redesigning the central
power supply. Only two external capacitors
are required for proper operation. The
output voltage is easily adjustable with one
external resistor. The PT6406,7,8 can be
used to terminate high-speed data buses
such as Futurebus (+2.1V) or the new GTL
(+1.2V) logic buses.
Please note that this product does not
include short circuit protection.
Standard Application
V _IN
2,3,4
C1 +
100µF
COM
PT6400
5,6,7,8
12
9,10,11
R1
(V OUP)
R2
(V ODOWN)
V _OUT
C2 +
100µF
COM
C₁ = Required 100µF electrolytic
C₂ = Required 100µF electrolytic
Pin-Out Information
Pin Function
1 Do not connect
2 Vin
3 V_in
4 Vin
5 GND
6 GND
7 GND
8 GND
9 V_out
10 Vout
11 Vout
12 V_outAdjust
Ordering Information
PT6404¨ = +1.5 Volts
PT6405¨ = +3.3 Volts
PT6406¨ = +1.8 Volts
PT6407¨ = +2.1 Volts
PT6408¨ = +1.2 Volts
PT6409¨ = +2.5 Volts
Pkg Style 300
PT6400
PT Series Suffix (PT1234X)
Case/Pin
Configuration
Vertical Through-Hole P
Horizontal Through-Hole D
Horizontal Surface Mount E
Note: Back surface
of product is
conducting metal.
Specifications
Characteristics
(T_a = 25°C unless noted)
Symbols
Conditions
Output Current
Current Limit
Input Voltage Range
Output Voltage Tolerance
Line Regulation
Load Regulation
Vo Ripple/Noise
Transient Response
with C2 = 100µF
Io
I_cl
Vin
∆Vo
Regline
Reg_load
Vn
ttr
Vos
4.5V ≤ Vin ≤ 5.5V
V_in = +5V
0.1A ≤ Io ≤ 3.0A
Vin = +5V, Io = 3.0A
0°C ≤ Ta ≤ +70°C
4.5V ≤ Vin ≤ 5.5V, Io = 3.0A
V_in = +5V, 0.3 ≤ I_o ≤ 3.0A
Vin = 5V, Io = 3.0A
Io step between 1.5A and 3.0A
Vo over/undershoot
Efficiency
η
Vin = +5V, Io = 1.5A Vo= 3.3V
Vo= 1.8V
Vo= 2.1V
Vo= 1.2V
Switching Frequency
ƒo
Absolute Maximum
Ta
Operating Temperature Range
4.5V ≤ Vin ≤ 5.5V
0.3A ≤ Io ≤ 3.0A
Recommended Operating
Ta
Temperature Range
Thermal Resistance
θja
Storage Temperature
Ts
Mechanical Shock
Free Air Convection (40-60 LFM)
At Vin= 5V, Io=2.5A
Free Air Convection (40-60 LFM)
—
Per Mil-STD-883D, Method 2002.3 , 1 msec,
Half Sine, mounted to a fixture
Mechanical Vibration
Weight
—
Per Mil-STD-883D, Method 2007.2,
20-2000 Hz, Soldered in a PC board
—
*ISR will operate down to no load with reduced specifications
PT6400 SERIES
Min
Typ
0.1*
—
—
3.6
4.5
—
Vo-0.05 —
—
±10
—
±10
—
66
—
200
—
200
—
85
—
74
—
77
—
63
500
650
0
—
0
—
—
25
-40
—
—
500
—
15
—
6.5
**See Thermal Derating chart.
Note: The PT6400 Series requires two 100µF electrolytic or tantalum capacitors for proper operation in all applications.
Max
3.0
5.0
5.5
Vo+0.05
±25
±25
165
—
—
—
—
—
—
800
+85
Units
A
A
V
V
mV
mV
mV
µSec
mV
%
%
%
%
kHz
°C
+ 70**
—
+125
—
—
—
°C
°C/W
°C
G’s
G’s
grams
24
Power Trends, Inc. 27715 Diehl Road, Warrenville, IL 60555 [phone] Fax: [phone] http://www.powertrends.com