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PT6472 Datasheet(PDF) 2 Page - Texas Instruments

Part # PT6472
Description  14-A 3.3-V Input Adjustable Integrated Switching Regulator
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Manufacturer  TI [Texas Instruments]
Direct Link  http://www.ti.com
Logo TI - Texas Instruments

PT6472 Datasheet(HTML) 2 Page - Texas Instruments

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For technical support and more information, see inside back cover or visit www.ti.com
PT6470 Series
14-A 3.3-V Input Adjustable
Integrated Switching Regulator
Specifications (Unless otherwise stated, Ta =25 °C, Vin =3.3 V, Cin =470 µF, Cout =0 µF, and Io =Iomax)
PT6470 SERIES
Characteristics
Symbols
Conditions
Min
Typ
Max
Units
Output Current
Io
Vin =3.3 V
0
14
A
Input Voltage Range
Vin
Over Io range
2.95
3.65
V
Set-Point Voltage Tolerance
Vo tol
±2
%Vo
Temperature Variation
∆Regtemp
–40 °C <Ta < +85 °C
±0.5
%Vo
Line Regulation
∆Regline
Over Vin range
±10
mV
Load Regulation
∆Regload
Over Io range
±12
mV
Total Output Variation
∆Regtot
Includes set-point, line, load,
——±3
%Vo
–40 °C
≤ Ta ≤ +85 °C
Efficiency
η
Io =10 A
PT6472 (2.5 V)
93
PT6473 (2.0 V)
92
PT6474 (1.8 V)
91
%
PT6475 (1.5 V)
89
PT6476 (1.2 V)
87
PT6477 (1.0 V)
85
Vo Ripple (pk-pk)
Vr
20MHz bandwidth—
20
mVpp
Transient Response
1 A/µs load step, 50 to 100 % Iomax,
Cout =330 µF
ttr
Recovery Time
50
µSec
∆Vtr
Vo over/undershoot
100
mV
Over-Current Threshold
ITRIP
Reset, followed by auto-recovery
27.5
A
Output Voltage Adjust
Vo adj
±15 (1) (2)
—%
Switching Frequency
ƒs
Over Vin and Io ranges
300
kHz
Inhibit Control (pin1)
Referenced to GND (pins 5–8)
Input High Voltage
VIH
Vin –0.5
Open (3)
V
Input Low Voltage
VIL
–0.2
0.8
Input Low Current
IIL
Pin 1 to GND
–10
µA
Inhibit Input Current
Iin inhibit
Pin 1 to GND
10
mA
External Input Capacitance
Cin
470 (4)
——µF
External Output Capacitance
Cout
0
330 (5) (6)
3,300
µF
Operating Temperature Range
Ta
Over Vin range
–40 (6)
85 (7)
°C
Solder Reflow Temperature
Treflow
Surface temperature of module pins or case
215 (8)
°C
Storage Temperature
Ts
–40
125
°C
Reliability
MTBF
Per Bellcore TR-332
8.0
106 Hrs
50 % stress, Ta =40 °C, ground benign
Mechanical Shock
Mil-STD-883D, Method 2002.3
500
G’s
Half Sine, mounted to a fixture
Mechanical Vibration
Mil-STD-883D, Method 2007.2,
Suffix N
20
20-2000 Hz, PCB mounted
Suffixes A, C
20 (9)
—G’s
Weight
10
grams
Flammability
Materials meet UL 94V-0
Notes: (1) This is a typical value. For the adjustment limits of a specific model consult the related application note on output voltage adjustment.
(2) The output voltage of the PT6472 (2.5 V) should not be adjusted higher than 2.5 V.
(3) The Inhibit control (pin 1) has an internal pull-up, and if left open-circuit the module will operate when input power is applied. A small low-leakage
(<100 nA) MOSFET is recommended to control this input. See application notes for more information.
(4) A 470 µF electrolytic input capacitor is required for proper operation. The capacitor must be rated for a minimumm of 0.7 Arms of ripple current.
(5) An external output capacitor is not required for basic operation. Adding 330 µF of distributed capacitance at the load will improve the transient response.
(6) For operation below 0 °C, COUT must have stable characteristics. Use either low-ESR tantalum or Oscon® type capacitors.
(7) See SOA curves or consult factory for the appropriate derating.
(8) During solder reflow of SMD package version do not elevate the module case, pins, or internal component temperature above a peak of 215 °C. For
further guidance refer to the application note, “Reflow Soldering Requirements for Plug-in Power Surface Mount Products,” (SLTA051).
(9) The case pins on the through-hole package types (suffixes N & A) must be soldered. For more information see the applicable package outline drawing.
SLTS180A - JANUARY 2003 - REVISED JUNE 2003


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