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参数资料
| 型号： | PT6477C |
| 厂商： | TEXAS INSTRUMENTS INC |
| 元件分类： | 稳压器 |
| 英文描述： | 14 A SWITCHING REGULATOR, 300 kHz SWITCHING FREQ-MAX, MSMA12 |
| 封装： | METAL, SMD-12 |
| 文件页数： | 7/14页 |
| 文件大小： | 296K |
| 代理商： | PT6477C |
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 F, Cout =0 F, 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/s load step, 50 to 100 % Iomax,
Cout =330 F
ttr
Recovery Time
—
50
—
Sec
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
s
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
—
A
Inhibit Input Current
Iin inhibit
Pin 1 to GND
—
10
—
mA
External Input Capacitance
Cin
470 (4)
——F
External Output Capacitance
Cout
0
330 (5) (6)
3,300
F
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 F 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 F 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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