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Details, datasheet, quote on part number:PT6944N
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| Part: | PT6944N |
| Category: | Power Management => Plug-in Power Solutions->Non-Isolated->Multiple Ou |
| Description: | ti PT6944, 3.3V/1.2V, 6A+6A 5V-Input Dual-output Isr |
| Company: | Texas Instruments, Inc. |
| Datasheet: | Download PT6944N datasheet File size : 195 kB |
| Request For quote: | Find where to buy PT6944N
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Datasheet text preview:
PT6940 Series
6-A Dual Output 5-V/3.3-V Input Integrated Switching Regulator
SLTS155B
Revised (4/8/2002)
Features
· High Efficiency Dual Output
(See Ordering Information)
· · · · · ·
Ideal Power Source for DSPs 5V/3.3V Input 6A Rated (Both Outputs) Internal Power-up Sequencing Single On/Off Control Independent Adjust/Trim
· Remote Sensing (Vo1 & Vo2) · Soft-Start · Short-Circuit Protection (coordinated shutdown) · 27-pin Space-Saving Package · Solderable Copper Case
Description
The PT6940 ExcaliburTM power modules are a series of high-efficiency dual-output regulators, housed in a solderable spacesaving package. The dual output is ideal for DSP applications that require a second voltage source for a processor core. Both outputs from the PT6940 regulator modules are rated to deliver a full 6A load current simultaneously, and are internally sequenced to comply with the power-up requirements of popular DSP ICs. Each output can be independently adjusted with a single external resistor, and incorporates an output sense to compensate for voltage drop between the regulator and load. A short-circuit load fault at either output will result in the coordinated shutdown of both voltages.
Ordering Information
PT6941o = +3.3/2.5 Volts PT6942o = +3.3/1.8 Volts PT6943o = +3.3/1.5 Volts PT6944o = +3.3/1.2 Volts PT6946o = +2.5/1.8 Volts PT6947o = +2.5/1.5 Volts PT6948o = +2.5/1.2 Volts
-Denotes models that will also operate off 3.3V input bus.
Pin-Out Information
P i n Function
1 2 3 4 5 6 7 8 9 10 11 12 13 14 STBY* Vo1 Adjust Vo1 Sense Vo1 Vo1 Vo1 GND GND GND GND GND GND V in V in
Pin
15 16 17 18 19 20 21 22 23 24 25 26 27
Function
V in V in GND GND GND GND GND GND Vo2 Vo2 Vo2 Vo2 Sense Vo2 Adjust
PT Series Suffix (PT1234x)
Case/Pin Configuration Ver tical Horizontal SMD Order Suffix Package Code (ENE) (ENF) (ENG)
N A C
(Reference the applicable package code drawing for the dimensions and PC layout)
STBY* pin: Open = Outputs enabled G r o u n d = Outputs disabled
Standard Application
Vo1 Sense STBY*
1 3 26 46
Vo2 Sense
Vo1 Vo2
VIN
1316
PT6940
2325
712
1722
CIN 330µF
+
Co1 330µF
+ Co 2
330µF
+
L O A D L O A D
Cin = Req'd 330µF * electrolytic
GND GND
Co1/Co2 = Req'd 330µF * electrolytic * 300µF for Oscon® or low ESR tantalum (see application notes)
For technical support and more information, see inside back cover or visit www.ti.com
PT6940 Series
6-A Dual Output 5-V/3.3-V Input Integrated Switching Regulator
General Specifications
Characteristic Output Current Input Voltage Range Set Point Voltage T lerance o Temperature Variation Line Regulation Load Regulation Total Output Voltage Variation
(Unless otherwise stated, Ta =25°C, Vin =5V, Cin =330µF, Co1 =330µF, Co 2 =330µF, and Io1/Io2 =Iomax) Symbol Io
(1)
Conditions Ta =25°C, natural convection Ta =60°C, 200LFM airflow Over Io Range
Min 0.1 (2) 0.1 (2) 3.1 4.5 -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- 300 -- 0.1 -- -- 330 40 (5) 40 -- -- -- --
PT6940 Series Typ Max
-- -- -- -- ±0.5 ±0.5 ±5 ±5 ±43 ±35 ±28 ±25 ±22 92 91 90 90 89 88 87 35 60 ±70 13 (3) 350 -- -- -0.5 10 -- -- -- TBD TBD (7) TBD (7) 34 6 6 5.5 5.5 ±2 -- ±10 ±10 ±100 ±75 ±54 ±45 ±36 -- -- -- -- -- -- -- -- -- -- -- 400 Open (4) +0.4 20 TBD +85 (6) +125 -- -- -- --
Units A V %Vo %Vo mV mV mV
V in Vo tol Regtemp Regline Regload Votot
Vo1 2.5V Vo1 >2.5V
40° Ta +85°C, Io =Iomin Over Vin range Over Io range Includes set-point, line, load, 40° Ta +85°C
Efficiency
Vin =5V, Io1 = Io2 =4A
Vo =3.3V Vo =2.5V Vo =1.8V Vo =1.5V Vo =1.2V PT6941 PT6942 PT6943 PT6944 PT6946 PT6947 PT6948
%
Vo Ripple (pk-pk) Transient Response Short Circuit Threshold Switching Frequency STBY* (Pin 1) Input High Voltage Input Low Voltage Input Low Current Quiescent Current External Output Capacitance Operating T mperature Range e Storage T mperature e Mechanical Shock Mechanical Vibration Weight Flammability Notes: (1) (2) (3) (4)
Vr ttr Vtr Isc(pk) o V IH V IL IIL Iin standby Ta Ts
20MHz bandwidth 1A/µs load step, 50% to 100% Iomax Vo over/undershoot Reset followed by auto-recovery Over Vin range Referenced to GND (pin 7)
mVpp µs mV A kHz V mA mA µF °C °C G' s G' s grams
pin 1 to GND Both outputs Over Vin Range -- Per Mil-STD-883D, Method 2002.3 1 msec, ½ Sine, mounted Mil-STD-883D Method 2007.2, Vertical 20-2000 Hz Horizontal Vertical/Horizontal Meets UL 94V-O
-- --
The outputs, Vo1 and Vo2, have similar characteristics. The applicable performance parameters are defined according to output voltage. The minimum output current applies to each output. The module will operate at no load with reduced specifications. A short-circuit load fault at either output causes the module to continuously reset, affecting both outputs. The STBY* control (pin 1) has an internal pull-up, and if it is left open circuit the module will operate when input power is applied. The open-circuit voltage is approximately the input voltage, Vin . Refer to the application notes for interface considerations. (5) For operating temperatures below 0°C, Cin, Co1, and Co2 must have stable characteristics. Use either tantalum or Oscon® capacitors. (6) See Safe Operating Area curves for the specific output voltage combination, or contact the factory for the appropriate derating. (7) Only the case pins on through-hole pin configurations (N & A) must be soldered. For more information see the applicable package outline drawing. Input/Output Capacitors: The PT6940 series requires a 330µF electrolytic capacitor at the input and both outputs for proper operation (300µF for Oscon® or low ESR tantalum). In addition, the input capacitance must be rated for a minimum of 1.0Arms ripple current. For transient or dynamic load applications, additional capacitance may be required. Refer to the application notes for more information.
For technical support and more information, see inside back cover or visit www.ti.com
PT6940 Series
6-A Dual Output 5-V/3.3-V Input Integrated Switching Regulator
Performance Characteristics; Vin =5V
Efficiency vs. Io 1 & Io 2 Load Currents
100 95 90 85 80 75 70 65 60 0 1 2 3 4 5 6
(See Note A)
Performance Characteristics; Vin =3.3V
Efficiency vs. Io1 & Io2 Load Currents
100 95 90
(See Note A)
PT6941 PT6942 PT6943 PT6944 PT6946 PT6947 PT6948
Efficiency - %
Efficiency - %
85 80 75 70 65 60 0 1 2 3 4 5 6
PT6946 PT6947 PT6948
Iout (A) [Both Outputs]
Iout (A) [Both Outputs ]
Vo1 Ripple vs. Io 1 & Io 2 Load Currents
35 30 25 35 30
Vo1 Ripple vs. Io 1 & Io2 Load Currents
20 15 10 5 0 0 1 2 3 4 5 6
PT6946 PT6947 PT6948 PT6941 PT6942 PT6943 PT6944
25
Vo1 Ripple - mV
Vo1 Ripple - mV
20 15 10 5 0 0 1 2 3 4 5 6
PT6946 PT6947 PT6948
Iout (A) [Both Outputs]
Iout (A) [Both Outputs]
Vo2 Ripple vs. Io 1 & Io 2 Load Currents
35 30 25 35 30
Vo2 Ripple vs. Io 1 & Io2 Load Currents
20 15 10 5 0 0 1 2 3 4 5 6
PT6941 PT6946 PT6942 PT6947 PT6948 PT6943 PT5944
25
Vo2 Ripple - mV
Vo2 Ripple - mV
20 15 10 5 0 0 1 2 3 4 5 6
PT6946 PT6947 PT6948
Iout (A) [Both Outputs]
Iout (A) [Both Outputs]
Power Dissipation Vs. Io1 & Io2 Load Currents
5 5
Power Dissipation vs. Io1 & Io2 Load Currents
4
4
Pd - Watts
3
Pd - Watts
0 1 2 3 4 5 6
3
2
2
1
1
0
0 0 1 2 3 4 5 6
Iout (A) [Both Outputs]
Iout (A) [Both Outputs]
Note A: Characteristic data has been developed from actual products tested at 25°C. This data is considered typical data for the Converter.
For technical support and more information, see inside back cover or visit www.ti.com
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