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Details, datasheet, quote on part number:PT6721C
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| Part: | PT6721C |
| Category: | Power Management => Plug-in Power Solutions->Non-Isolated->Single Posi |
| Description: | ti PT6721, 14 Amp 12V-Input Programmable Isr, cu Case |
| Company: | Texas Instruments, Inc. |
| Datasheet: | Download PT6721C datasheet File size : 149 kB |
| Request For quote: | Find where to buy PT6721C
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Datasheet text preview:
PT6721--12V
14 Amp Programmable Integrated Switching Regulator
SLTS101A
(Revised 10/31/2000)
· +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
Patent pending on package assembly
The PT6721 is a new high-performance, 14 Amp Integrated Switching Regulators (ISRs) housed in a unique, 23-pin space-saving package. The PT6721 operates from a standard 12V power bus to provide a high performance low-voltage power source for the industry's latest high-speed, low-voltage µPs 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.
Standard Application
PROGRAMMING PINS
VID0 VID1 VID2 VID3 VID4 REMOTE SENSE (+)
76543 1 23
PT6700 Product Family
OVP DRV
Input Vout Voltage Adjust PT6701 5V 3.3V 5V 5V 12V 12V VID VID Resistor Resistor VID Resistor
OVP/ PWRGD 3 3
Needs 12VBias
V IN
L1
10 - 12
1µH R1 CIN PWR GOOD GND STBY* +
2
PT6721
14 - 18 8 13
19 - 22
VOUT
PT6702 PT6705
3 3
COUT
+
LOAD
PT6715 PT6721
GND
REMOTE SENSE (-)
PT6725
Ci n Cout L1 R1
Specifications
Characteristics (Ta = 25°C unless noted) Output Current Input Voltage Range Output Voltage Tolerance Short-Circuit Threshold Line Regulation Load Regulation Vo Ripple/Noise Transient Response with Cout = 330µF Efficiency
= Required 1000µF electrolytic (See footnotes) = Required 330µF electrolytic (See footnotes) = Optional 1µH input choke (See footnotes) = Required 10k pull-up when using Pwr Good signal. Pwr good output is high when the output voltage is within specification.
PT6 72 1 SERIES
Symbols Io Vi n Vo Isc R e g line R e gload Vn t tr V os Conditions Ta = +60°C, 200 LFM, pkg N Ta = +25°C, natural convection 0.1A Io 14A Vin = +12V, Io = 14A -40°C Ta +85°C Vin = +12V 10.8V Vin 13.2V, Io = 14A Vin = +12V, 0.1 Io 14A Vin = +12V, Io = 14A Io step between 7A and 14A Vo over/undershoot Vin = +12V, Io = 9A Vo Vo Vo Vo = = = = 3.3V 2.5V 1.8V 1.5V Mi n 0. 1 0.1
(1) (1)
Typ -- -- -- -- 20 ±5 ±10 35 50 70 90 88 83 81 350
(2)
Max 14 14 13.2 V o + 0.03 30 -- -- -- -- -- -- -- -- -- 400 +85
(3)
Units A V V A mV mV mV µSec mV % kHz °C °C G's G's grams
10.8 V o 0.03 -- -- -- -- -- -- -- -- -- -- 300 -40 -40 -- -- --
Switching Frequency Absolute Maximum Operating Temperature Range Storage Temperature Mechanical Shock Mechanical Vibration Weight
o Ta Ts
10.8V Vin 13.2V 0.1A Io 14.0A -- -- 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
-- -- 500 15 26
+125 -- -- --
--
--
Notes: ( 1 ) (2) (3) (4)
ISR-will operate down to no load with reduced specifications. For operation below 0°C, Cin and Cout must have stable characteristics. Use either low ESR tantalum or Oscon® capacitors. See Safe Operating Area curves, or contact the factory for appropriate derating. 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 330µF, with a maximum ESR of 50m @100kHz for proper operation. The maximum allowable output capacitance is 15,000µF. 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. I n p u t Filter: An input filter inductor is optional for most applications. The inductor must be sized to handle 5ADC with a typical value of 1µH.
For technical support and more information, see inside back cover or visit www.ti.com/powertrends
PT6721--12V
14 Amp Programmable Integrated Switching Regulator
Pin-Out Information
Pi n Function
1 2 3 4 5 6 7 8 9 10 11 12 OVP Drive Pwr Good VID0 VID1 VID2 VID3 VID4 STBY#
Do not connect
Programming Information
Pi n Function
13 14 15 16 17 18 19 20 21 22 23
#For
Ordering Information
P T 6 721o = 1.3 to 3.5 Volts
(For dimensions and PC board layout, see Package Styles 1300 and 1310.)
1.30V 1.35V 1.40V 1.45V 1.50V 1.55V 1.60V 1.65V 1.70V 1.75V 1.80V 1.85V 1.90V 1.95V 2.00V 2.05V
Remote Sense Gnd
(4)
VID3 VID2 VID1 VID0
1 1 1 1 1 1 1 1 0 0 0 0 0 0 0 0 1 1 1 1 0 0 0 0 1 1 1 1 0 0 0 0 1 1 0 0 1 1 0 0 1 1 0 0 1 1 0 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0
VID4=1 VID4=0 Vout Vout
2.0V 2.1V 2.2V 2.3V 2.4V 2.5V 2.6V 2.7V 2.8V 2.9V 3.0V 3.1V 3.2V 3.3V 3.4V 3.5V
GND GND GND GND GND Vout Vout Vout Vout
Remote Sense Vout
PT Series Suffix (PT1234X)
Case/Pin Configuration Vertical Through-Hole N Horizontal Through-Hole A Horizontal Surface Mount C
Vi n Vi n Vi n
STBY pin:open =output enabled ground =output disabled.
Logic 0 = Pin 13 potential (remote sense gnd) Logic 1 = Open circuit (no pull-up resistors) VID3 and VID4 may not be changed while the unit is operating.
TYPICAL 12.0V Input Voltage
Efficiency vs Output Current
100
CHARACTERISTICS Safe Operating Area Curves (Note B)
Vout =3.3V, Pkg Suffix `N'
90.0 80.0
(Note A)
Ambient Temperature (°C)
90
70.0 60.0 50.0 40.0 30.0 20.0
Efficiency - %
80
VOUT 3.3V 2.5V 1.5V
Airflow 200LFM 120LFM 60LFM Nat conv
70
60
50
40 0 2 4 6 8 10 12 14
0.0
2.0
4.0
6.0
8.0
10.0
12.0
14.0
Iout (A)
Iout (A)
Ripple vs Output Current
25
20
Ripple - mV
VOUT
15
10
3.3V 2.5V 1.5V
5
0 0 2 4 6 8 10 12 14
Iout (A)
Power Dissipation vs Output Current
7 6 5
Pd - Watts
VOUT
4 3 2 1 0 0 2 4 6 8 10 12 14
3.3V 2.5V 1.5V
Iout (A)
Note: A All data listed in the above graphs has been developed from actual products tested at 25°C. This data is considered typical data for the ISR. Note: B SOA Curves represent the conditions at which internal components are at or below manufacturer's maximum operating temperatures.
For technical support and more information, see inside back cover or visit www.ti.com/powertrends
Application Notes
PT6701/PT6702/PT6721
Operating Features of the Programmable PT6700 "ExcaliburTM" Series ISRs
Power Good Programmable versions of the PT6700 Series regulators incorporate a PWR Good output (pin 2). This output is open-drain and generates an acitve-high signal when the sensed output from the ISR is within a nominal ±10% of the programmed set point. When the regulated output is outside this range, pin 2 asserts a logic low (typically <0.1V). A 10k pull-up resistor to a valid bus voltage is required. If the power good feature is not used, the pull-up resistor can be omitted. The maximum voltage that may be applied to the pull-up resistor is 15V. Over-Voltage Protection (OVP) The PT6700 programmable regulators also incorporate an OVP function. The OVP DRV (pin 1) normally has a logic low output (typically <0.1V). When the ISR's sensed output exceeds the programmed output setting by 15%, pin 1 produces a 60mA, +12V drive signal. This drive signal can trigger an SCR, which can be used to disable the input voltage, or alternatively interface to another external monitoring device. When the ISR output voltage returns to within 15% of its programmed setting, pin 1 reverts back to its low state. If the OVP function is not used, pin 1 may be left open circuit. Stand-By Function The PT6700 series ISRs incorporate a standby function. This feature may be used for power-up sequencing, or wherever there is a requirement for the output voltage to be controlled by external circuitry. If the STBY* input (pin 8) is left open-circuit the regulator operates normally, providing a regulated output when a valid supply voltage is applied to Vin (pins 10-12) with respect to GND (pins 14-18). Connecting pin 8 to ground 1 places the regulator in standby mode, and reduces the input current to typically 20mA (30mA max). Applying a ground signal to pin 8 prior to power-up, will disable the output during the period that input power is applied. T ensure that the regulator output is fully enabled, pin 8 must o be allowed to rise to a minimum of 3.0V. Notes :
2 . The Standby input can also be interfaced to TTL or other bi-directional output device using a schottky diode. See Figure 1. 3 . When placed in the standby mode, the regulator output may assert a low impedance to ground. If an external voltage is applied to the output, it will sink current and possibly over-stress the part.
Table 1 Inhibit Control Threshold 2,3 Parameter Min Typ
Enable (VIH) Disable (VIL) Istby 3.0V -0.1V 0.4V 0.01mA 1..0V
Max
Figure 1
OVP DRV
7 6543 V I D 4 - VID0 1 OVP 23 SNS(+) 19-22 Vo
5V
R1 10k C in
10-12
Vin Pwr Good 2
PT6700
STBY 8 GND 14-18 13
V o =2.5V
SNS(-)
+
+ C out L O A D
Pwr Good
Q1 BSS138
Inhibit
COM
5V D1 BAT54 * * or equiv. Schottky diode
COM
Turn-On Time Turning Q1 in Figure 1 off, removes the low-voltage signal at pin 8 and enables the output. Following a brief delay of 10-15ms, the output voltage of the PT6700 regulator rises to full regulation within 30ms. Figure 2 shows the typical output voltage waveform of a PT6701 following the prompt turn-off of Q 1 at time t =0 secs. The output voltage was set to 2.5V. The waveforms were measured with a 5V input source voltage, and 10A resistive load.
Figure 2
Vout (2V/Div)
Iin (5A/Div)
1 . The standby on the PT6700 series is ideally controlled with an open-collector (or open-drain) discrete transistor (See fig. 1). Table 1 gives the threshold requirements. Do Not use a pull-up resistor. The control input has an opencircuit voltage of about 4.0Vdc. To set the regulator output to zero, the control pin must be "pulled" to less than 1.0Vdc with a sink to ground.
VPWGD (10V/Div)
0
5
10
15
20
25
30
35
40
t (milli - secs)
For technical support and more information, see inside back cover or visit www.ti.com/powertrends
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