Texas Instruments PT6424D, PT6424E, PT6424P, PT6425D, PT6425E Datasheet
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For assistance or to order, call (800) 531-5782
Power Trends, Inc. 27715 Diehl Road, Warrenville, IL 60555 (800) 531-5782 Fax: (630) 393-6902 http://www.powertrends.com
26
Application Notes
Mechanical Outline
Product Selector Guide
Revised 5/15/98
Standard Application
C1 = Required 100µF electrolytic
C2 = Required 100µF electrolytic
Ordering Information
PT6424¨ = +1.5 Volts
PT6425¨ = +3.3 Volts
PT6426¨ = +1.8 Volts
PT6427¨ = +2.1 Volts
PT6428¨ = +1.2 Volts
PT6429¨ = +2.5 Volts
Pin-Out Information
Pin Function
1 Remote Sense
2 Do not connect
3 Do not connect
4V
in
5V
in
6V
in
7
GND
8
GND
9
GND
10
GND
11 V
out
12 V
out
13 V
out
14 V
out
Adjust
• Adjustable Output Voltage
• 85% Efficiency
• Small SIP Footprint
• Input Voltage Range: 4.5V to 5.5V
• Remote Sense Capability
The PT6420 is a new addition to
the Power Trends high performance
+5V to +3.3V, 3Amp family of 14-Pin
SIP (Single In-line Package) Integrated
Switching Regulators (ISRs). Only two
external capacitors are required for
proper operation.
Please note that this product does
not include short circuit protection.
3 AMP ADJUSTABLE INTEGRATED
SWITCHING REGULATOR
PT6420 Series
PT Series Suffix
(PT1234X)
Case/Pin
Configuration
Vertical Through-Hole
P
Horizontal Through-Hole
D
Horizontal Surface Mount
E
PT6420
POWER TRENDS
Note: Back surface
of product is
conducting metal.
PT6420
C2
100µF
+
COM
V
OUT
4,5,6
7,8,9,10
11,12,13
14
C1
100µF
+
V
IN
COM
R1
(VOUP)
R2
(VODOWN)
Remote
Sense
1
Pkg Style 310
Specifications
Characteristics
PT6420 SERIES
(Ta = 25°C unless noted) Symbols Conditions Min Typ Max Units
Output Current I
o
4.5V ≤ V
in
≤ 5.5V 0 — 3.0 A
Current Limit I
cl
V
in
= +5V — 3.6 5.0 A
Input Voltage Range V
in
0.1A ≤ I
o
≤ 3.0A 4.5 — 5.5 V
Output Voltage Tolerance ∆V
o
V
in
= +5V, Io = 3.0A
V
o-0.05 3.3 Vo+0.05 V
0°C ≤ Ta ≤ +70°C
Line Regulation Reg
line
4.5V ≤ V
in
≤ 5.5V, I
o
= 3.0A — ±10 ±25 mV
Load Regulation Reg
load
Vin = +5V, 0.3 ≤ I
o
≤ 3.0A — ±10* ±25* mV
Vo Ripple/Noise V
n
V
in
= 5V, Io = 3.0A — 66 165 mVpp
Transient Response t
tr
Io step between 1.5A and 3.0A — 200 — µSec
with C2 = 100µF V
os
Vo over/undershoot — 200 — mV
Efficiency η V
in
= +5V, Io = 1.5A Vo= 3.3V — 85 — %
V
o= 1.8V — 74 — %
V
o= 2.1V — 77 — %
Vo= 1.2V — 63 — %
Switching Frequency ƒ
o
4.5V ≤ V
in
≤ 5.5V
500 650 800 kHz
0.3A ≤ I
o
≤ 3.0A
Absolute Maximum T
a
0—+85°C
Operating Temperature Range
Recommended Operating T
a
Free Air Convection (40-60 LFM)
0 — +70** °C
Temperature Range At Vin= 5V, Io=2.5A
Thermal Resistance θ
ja
Free Air Convection (40-60 LFM) — 25 — °C/W
Storage Temperature T
s
— -40 — +125 °C
Mechanical Shock Per Mil-STD-883D, Method 2002.3 , 1 msec,
— 500 — 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
—15—G’s
Weight — — — 6.5 — grams
*When used with remote sense function.
**See Thermal Derating chart.
Note:
The PT6420 Series requires two 100µF electrolytic or tantalum capacitors for proper operation in all applications.
For assistance or to order, call (800) 531-5782
Power Trends, Inc. 27715 Diehl Road, Warrenville, IL 60555 (800) 531-5782 Fax: (630) 393-6902 http://
www.powertrends.com
27
5V to 3.x Converters
5V Bus Products
DATA SHEETS
CHARACTERISTIC DATA
0
0.5
1
1.5
2
2.5
3
4.5 4.75 5 5.25 5.5
PT6427, 2.1 VDC (See Note 1)
Efficiency vs Output Current
Ripple vs Output Current
Power Dissipation vs Output Current
Note 1:Note 1:
Note 1:Note 1:
Note 1: All data listed in the above graphs except for derating data has been developed from actual products tested at 25°C. This data is considered typical data for the ISR.
Note 2: Thermal derating graphs are developed in free air convection cooling of 40-60 LFM. (See Thermal Application Notes.)
40
50
60
70
80
90
100
0 0.5 1 1.5 2 2.5 3
4.5V
5.0V
5.5V
Vin
0
0.2
0.4
0.6
0.8
1
1.2
1.4
1.6
1.8
2
0 0.5 1 1.5 2 2.5 3
5.5V
5.0V
4.5V
Vin
Efficiency - %Ripple-(mV)PD-(Watts)
Iout-(Amps)
Iout-(Amps)
Iout-(Amps)
PT6420 Series
Thermal Derating (Ta) (See Note 2)
Iout-(Amps)
Vin-(Volts)
Efficiency vs Output Current
Ripple vs Output Current
Power Dissipation vs Output Current
Efficiency - %Ripple-(mV)PD-(Watts)
Iout-(Amps)
Iout-(Amps)
Iout-(Amps)
Thermal Derating (Ta) (See Note 2)
Iout-(Amps)
Vin-(Volts)
PT6425, 3.3 VDC (See Note 1)
Efficiency vs Output Current
Ripple vs Output Current
Power Dissipation vs Output Current
Efficiency - %Ripple-(mV)PD-(Watts)
Iout-(Amps)
Iout-(Amps)
Iout-(Amps)
Thermal Derating (Ta) (See Note 2)
Iout-(Amps)
Vin-(Volts)
PT6428 1.2 VDC (See Note 1)
0
0.5
1
1.5
2
2.5
3
4.5 4.75 5 5.25 5.5
40
50
60
70
80
90
100
0.0 0.5 1.0 1.5 2.0 2.5 3.0
4.5V
5.0V
5.5V
Vin
85°C
0.0
0.5
1.0
1.5
2.0
2.5
3.0
0.0 0.5 1.0 1.5 2.0 2.5 3.0
5.5V
5.0V
4.5V
Vin
0
20
40
60
80
100
0 0.5 1 1.5 2 2.5 3
5.5V
5.0V
4.5V
Vin
40
50
60
70
80
90
100
0 0.5 1 1.5 2 2 .5 3
4.5V
5.0V
5.5V
Vin
0
0.5
1
1.5
2
2.5
3
4.5 4.75 5 5.25 5.5
85°C
0
0.5
1
1.5
2
2.5
00.511.522.53
5.5V
5.0V
4.5V
Vin
0
20
40
60
80
100
00.511.522.53
5.5V
5.0V
4.5V
Vin
85°C
0
20
40
60
80
100
00.511.522.53
5.5V
5.0V
4.5V
Vin
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