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Details, datasheet, quote on part number:PT6427D
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| Part: | PT6427D |
| Category: | Power Management => Plug-in Power Solutions->Non-Isolated->Single Posi |
| Description: | ti PT6427, 2.1Vout 3A 5V-Input Adjustable Step-down Isr |
| Company: | Texas Instruments, Inc. |
| Datasheet: | Download PT6427D datasheet File size : 135 kB |
| Request For quote: | Find where to buy PT6427D
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Datasheet text preview:
PT6420 Series
3 Amp 5V Input Adjustable Integrated Switching Regulator
SLTS033A
(Revised 6/30/2000)
· · · · ·
Adjustable Output Voltage 85% Efficiency Small SIP Footprint Input Voltage Range: 4.5V to 5.5V Remote Sense Capability
The PT6420 series from Power T ends is a high performance +5V to r +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.
Pin-Out Information
Pin
1
Ordering Information
PT6424 PT6425 PT6426 PT6427 PT6428 PT6429 = +1.5 Volts = +3.3 Volts = +1.8 Volts = +2.1 Volts = +1.2 Volts = +2.5 Volts
PT Series Suffix (PT1234X)
Case/Pin Configuration Vertical Through-Hole P Horizontal Through-Hole D Horizontal Surface Mount E
Function
Remote Sense Do not connect Do not connect Vin Vin Vin GND GND GND GND V out V out V out Vout Adjust
Standard Application
Remote Sense
1
2 3 4 5 6
C2 100µF R2
(VODOWN)
VIN
4,5,6
PT6420
7,8,9,10 14
11,12,13
VOUT
R1 C1 100µF COM +
(VOUP)
+
7
COM
8 9 10 11 12 13 14
Pkg Style 310
PT6420 POWER TRENDS
C1 = Required 100µF electrolytic C2 = Required 100µF electrolytic
Note: Back surface of product is conducting metal.
Specifications
Characteristics (Ta = 25°C unless noted) Output Current Current Limit Input Voltage Range Output Voltage T lerance o Line Regulation Load Regulation Vo Ripple/Noise Transient Response with C2 = 100µF Efficiency Symbols Io I cl Vi n Vo R e g line R e gload Vn t tr V os
PT6420 SERIES
Conditions 4.5V Vin 5.5V Vin = +5V 0.1A Io 3.0A Vin = +5V, Io = 3.0A 0°C Ta +70°C 4.5V Vin 5.5V, Io = 3.0A Vin = +5V, 0.3 I o 3.0A Vin = 5V, I o = 3.0A Io step between 1.5A and 3.0A Vo over/undershoot Vin = +5V, Io = 1.5A Vo= 3.3V Vo= 1.8V Vo= 2.1V Vo= 1.2V Min 0 -- 4.5 V o -0.05 -- -- -- -- -- -- -- -- -- 500 0 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 Per Mil-STD-883D, Method 2007.2, 20-2000 Hz, Soldered in a PC board -- -- 0 -- -40 -- -- -- Typ -- 3.6 -- 3.3 ±10 ±10* 66 200 200 85 74 77 63 650 -- -- 25 -- 500 15 6.5 Max 3.0 5.0 5.5 V o +0.05 ±25 ±25* 165 -- -- -- -- -- -- 800 +85 +70** -- +125 -- -- -- Units A A V V mV mV mVpp µSec mV % % % % kHz °C °C °C/W °C G's G's grams
Switching Frequency Absolute Maximum Operating T mperature Range e Recommended Operating T mperature Range e Thermal Resistance Storage T mperature e Mechanical Shock Mechanical Vibration Weight
o Ta Ta
4.5V Vin 5.5V 0.3A Io 3.0A
ja
Ts
*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 technical support and more information, see inside back cover or visit www.ti.com/powertrends
PT6420 Series
3 Amp 5V Input Adjustable Integrated Switching Regulator
Typical Characteristics
PT6428 1.2 VDC
(See Note 1)
PT6427, 2.1 VDC
(See Note 1)
PT6425, 3.3 VDC
(See Note 1)
Efficiency vs Output Current
10 0 90
10 0 90
Efficiency vs Output Current
10 0 90
Efficiency vs Output Current
Efficiency - %
Efficiency - %
Efficiency - %
V in
V in
80 70 60 50 40 0.0 0.5 1.0 1.5 2.0 2.5 3.0
80 70 60 50 40 0 0.5 1 1.5 2 2.5 3
4 .5 V 5 .0 V 5 .5 V
4 .5 V 5 .0 V 5 .5 V
80
Vin 4 .5V 5 .0V 5 .5V
70
60
50
40 0 0. 5 1 1. 5 2 2. 5 3
Iout-(Amps)
Iout-(Amps)
Iout-(Amps)
Ripple vs Output Current
1 00
Ripple vs Output Current
10 0 80
100
Ripple vs Output Current
80
V in
80
Ripple-(mV)
Ripple-(mV)
Ripple-(mV)
60
V in
5 .5 V
60 40 20 0
5 .5 V 5 .0 V 4 .5 V
Vin 60 5.5V 5.0V 40 4.5V
40
5 .0 V 4 .5 V
20
20
0 0 0 .5 1 1 .5 2 2 .5 3
0
0
0 .5
1
1 .5
2
2 .5
3
0
0.5
1
1.5
2
2.5
3
Iout-(Amps)
Iout-(Amps)
Iout-(Amps)
Thermal Derating (Ta)
3 2.5 2 1.5 1 0.5 0 4.5 4 .7 5 5
(See Note 2)
3
85°C
Thermal Derating (Ta)
2.5 2 1.5 1 0.5
(See Note 2)
85°C
Thermal Derating (Ta)
3 2.5 2
(See Note 2)
85°C
Iout-(Amps)
Iout-(Amps)
Iout-(Amps)
1.5 1 0.5 0
0
4.5
4 .75
5
5 .25
5.5
5 .2 5
5.5
4.5
4.75
5
5.25
5.5
Vin-(Volts)
Vin-(Volts)
Vin-(Volts)
Power Dissipation vs Output Current
3.0 2.5
Vin
Power Dissipation vs Output Current
2. 5 2
V in
2 1.8 1.6
Power Dissipation vs Output Current
PD-(Watts)
PD-(Watts)
PD-(Watts)
2.0 1.5 1.0 0.5 0.0 0.0 0.5 1.0 1.5 2.0 2.5 3.0
5.5V 5.0V 4.5V
5 .5 V
1.4 1.2 1 0.8 0.6 0.4 0.2
Vin 5.5V 5.0V 4.5V
1. 5 1 0. 5 0 0 0. 5 1 1. 5 2 2. 5 3
5 .0 V 4 .5 V
0 0 0.5 1 1.5 2 2.5 3
Iout-(Amps)
Iout-(Amps)
Iout-(Amps)
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.)
For technical support and more information, see inside back cover or visit www.ti.com/powertrends
Application Notes
PT6420 Series
Adjusting the Output Voltage of the PT6420 Series 3AMP 5V Bus Converters
The output voltage of the Power Trends PT6420 Series ISRs may be adjusted higher or lower than the factory trimmed pre-set voltage with the addition of a single external resistor. Table 1 accordingly gives the allowable adjustment range for each model in the series as Va (min) and Va (max). Adjust Up: (See note 1) An increase in the output voltage is obtained by adding a resistor R1, between pin 14 (Vo adjust) and pins 11-13 (Vout). Adjust Down: (See note 1) Add a resistor (R2), between pin 14 (Vo adjust) and pins 7-10 (GND). Refer to Figure 1 and T ble 2 for both the placement and value a of the required resistor; either R1 or (R2) as appropriate. Notes: 1. The direction in which each resistor adjusts the output of the PT6420 series differs from many other Power Trends products. These output voltage adjustment notes are therefore specific only to the PT6420 models. 2. Use only a single 1% resistor in either the R1 or (R2) location. Place the resistor as close to the ISR as possible. 3. Never connect capacitors from Vo adjust to either GND, Vout, or the Remote Sense pin. Any capacitance added to the Vo adjust pin will affect the stability of the ISR. 4. The PT6420 incorporates a Remote Sense (See Figure 1). If this feature is being used, connecting the resistor R1 between pin 14 (Vo adjust) and pin 1 (Remote Sense) can benefit load regulation. 5. An increase in the output voltage may place additional limits on the input voltage range of the part. The revised minimum input voltage will be (Vout + 1.2) or 4.5V, whichever is higher. Do not exceed 5.5Vdc.
Figure 1
1 Vsense 4,5,6 11,12,13
Vin
Vin
PT6420
GND 7,8,9,10 Vo(adj) 14
Vo
Vo
C1 1 0 0 µF
+
R1 Adjust Up
C2 1 0 0 µF
+
L O A D
(R2) A d j Down COM COM
The values of R1 [adjust up], and (R2) [adjust down], can also be calculated using the following formulae. 12.45 Vo (Va Vo)
R1
=
49.9
k
(R2)
=
12.45 (2Va Vo) Vo Va
49.9 k
Where:
Vo Va
= Original output voltage = Adjusted output voltage
Table 1 PT6420 ADJUSTMENT RANGE
S e r i e s Pt # Vo (nom) Va (min) Va (max) PT6428 1.2 1.1 1.4 PT6424 1.5 1.3 1.8 PT6426 1.8 1.5 2.2 PT6427 2.1 1.8 2.6 PT6429 2.5 2.1 3.1 PT6425 3.3 2.8 3.8
For technical support and more information, see inside back cover or visit www.ti.com/powertrends
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