參數(shù)資料
型號(hào)： PT6721C
廠商： TEXAS INSTRUMENTS INC
元件分類： 穩(wěn)壓器
英文描述： 14 A SWITCHING REGULATOR, 400 kHz SWITCHING FREQ-MAX, SMA23
封裝： SURFACE MOUNT PACKAGE-23
文件頁(yè)數(shù)： 1/7頁(yè)
文件大小： 194K
代理商： PT6721C
For technical support and more information, see inside back cover or visit www.ti.com/powertrends
Standard Application
PT6721—12V
The PT6721 is a new high-perfor-
mance, 14 Amp Integrated Switching
Regulators (ISRs) housed in a unique, 23-pin
space-saving package. The PT6721 op-
erates from a standard 12V power bus to
provide a high performance low-voltage
power source for the industry’s latest
high-speed, low-voltage Ps and bus drivers.
The output voltage of the PT6721 can
be easily programmed from 1.3V to 3.5V
with a 5-bit input compatible with Intel’s
Pentium Processor family.
+12V input
5-bit Programmable:
1.3V to 3.5V@14A
High Efficiency
Input Voltage Range:
10.8V to 13.2V
Differential Remote Sense
23-pin Space Saving Package
Solderable Copper Case
Short Circuit Protection
Over-Voltage Drive
Power Good Signal
Cin = Required 1000F electrolytic (See footnotes)
Cout = Required 330F electrolytic (See footnotes)
L1
= Optional 1H input choke (See footnotes)
R1
= Required 10k
pull-up when using Pwr Good signal. Pwr good
output is high when the output voltage is within specification.
SLTS101A
(Revised 10/31/2000)
PT6721
10 - 12
14 - 18
19 - 22
2
V
IN
GND
1H
GND
V
OUT
C
OUT
+
C
IN
+
13
23
3
L1
PWR GOOD
LOAD
REMOTE SENSE (+)
REMOTE SENSE (-)
VID1
VID2
VID3
VID4
PROGRAMMING PINS
4
5
6
STBY*
8
7
VID0
OVP DRV
1
R1
14 Amp Programmable
Integrated Switching Regulator
Patent pending on package assembly
PT6700 Product Family
Input
Vout
OVP/
Needs
Voltage Adjust
PWRGD
12VBias
PT6701
5V
VID
3
PT6702
3.3V
VID
3
PT6705
5V
Resistor
3
PT6715
5V
Resistor
PT6721
12V
VID
3
PT6725
12V
Resistor
Specifications
Characteristics
PT6721 SERIES
(T
a = 25°C unless noted)
Symbols
Conditions
Min
Typ
Max
Units
Output Current
Io
Ta = +60°C, 200 LFM, pkg N
0.1 (1)
—14
A
Ta = +25°C, natural convection
0.1 (1)
—14
Input Voltage Range
Vin
0.1A
≤ Io ≤ 14A
10.8
—
13.2
V
Output Voltage Tolerance
Vo
Vin = +12V, Io = 14A
Vo–0.03
—
Vo+0.03
V
-40°C
≤ Ta ≤ +85°C
Short-Circuit Threshold
Isc
Vin = +12V
—
20
30
A
Line Regulation
Regline
10.8V
≤ Vin ≤ 13.2V, Io = 14A
—
±5
—
mV
Load Regulation
Regload
Vin = +12V, 0.1 ≤ Io ≤ 14A
—
±10
—
mV
Vo Ripple/Noise
Vn
Vin = +12V, Io = 14A
—
35
—
mV
Transient Response
ttr
Io step between 7A and 14A
—
50
—
Sec
with Cout = 330F
Vos
Vo over/undershoot
—
70
—
mV
Efficiency
η
Vin = +12V, Io = 9A
Vo = 3.3V
—
90
—
Vo = 2.5V
—
88
—
%
Vo = 1.8V
—
83
—
Vo = 1.5V
—
81
—
Switching Frequency
o
10.8V
≤ Vin ≤ 13.2V
300
350
400
kHz
0.1A
≤ Io ≤ 14.0A
Absolute Maximum
Ta
—
-40 (2)
—
+85 (3)
°C
Operating Temperature Range
Storage Temperature
Ts
—
-40
—
+125
°C
Mechanical Shock
Per Mil-STD-883D, Method 2002.3
1 msec, Half Sine, mounted to a fixture
—
500
—
G’s
Mechanical Vibration
Per Mil-STD-883D, Method 2007.2,
—
15
—
G’s
20-2000 Hz, Soldered in a PC board
Weight
—
26
—
grams
Notes: (1) ISR-will operate down to no load with reduced specifications.
(2) For operation below 0°C, Cin and Cout must have stable characteristics. Use either low ESR tantalum or Oscon capacitors.
(3) See Safe Operating Area curves, or contact the factory for appropriate derating.
(4) If the Remote Sense Ground is note used, pin 13 must be connected to pin 14 for optimum output voltage accuracy.
External Capacitors: The PT6721 requires a minimum output capacitance of 330F, with a maximum ESR of 50m
@100kHz for proper operation. The maxi-
mum allowable output capacitance is 15,000F. The input capacitance must be rated for a minimum of 1.6Arms of ripple current. For transient or dynamic load
applications, additional capacitance may be required. For more information refer to the application note regarding capacitor selection for this product.
Input Filter: An input filter inductor is optional for most applications. The inductor must be sized to handle 5ADC with a typical value of 1H.
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