PT6943A Datasheet, PDF (2/11 Pages) Texas Instruments – 6-A Dual Output 5-V/3.3-V Input Integrated Switching Regulator

PT6940 Series
6-A Dual Output 5-V/3.3-V Input
Integrated Switching Regulator
Not Recommended For New Designs
General Specifications (Unless otherwise stated, T_a =25°C, V_in =5V, C_in =330µF, Co₁ =330µF, Co₂ =330µF, and Io₁/Io₂ =Iomax)
PT6940 Series
Characteristic
Symbol
Conditions
Min
Typ
Max
Output Current
Input Voltage Range
Set Point Voltage Tolerance
Temperature Variation
Line Regulation
Load Regulation
Total Output Voltage Variation
Efficiency
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 Temperature Range
Io (1)
Vin
Vo tol
Reg_temp
Regline
Reg_load
∆Votot
η
Vr
ttr
∆Vtr
Isc(pk)
ƒo
VIH
V_IL
IIL
I_in standby
T_a
Ta =25°C, natural convection
Ta =60°C, 200LFM airflow
Over Io Range
Vo1 ≤2.5V
Vo₁ >2.5V
–40° ≤T_a ≤ +85°C, I_o =I_omin
Over Vin range
Over I_o range
Includes set-point, line, load,
–40° ≤Ta ≤ +85°C
Vin =5V, Io1 = Io2 =4A
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)
Vo =3.3V
Vo =2.5V
Vo =1.8V
V_o =1.5V
Vo =1.2V
PT6941
PT6942
PT6943
PT6944
PT6946
PT6947
PT6948
pin 1 to GND
Both outputs
Over V_in Range
0.1 (2)
0.1 (2)
3.1
4.5
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
300
—
–0.1
—
—
330
–40 (5)
—
—
—
—
±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
—
—
6
6
5.5
5.5
±2
—
±10
±10
±100
±75
±54
±45
±36
—
—
—
—
—
—
—
—
—
—
—
400
Open (4)
+0.4
–
20
TBD
+85 (6)
Units
A
V
%Vo
%V_o
mV
mV
mV
%
mVpp
µs
mV
A
kHz
V
mA
mA
µF
°C
Storage Temperature
Mechanical Shock
Mechanical Vibration
Weight
Flammability
Ts
—
–40
—
+125
°C
Per Mil-STD-883D, Method 2002.3
1 msec, ½ Sine, mounted
—
TBD
—
G’s
Mil-STD-883D Method 2007.2,
Vertical —
20-2000 Hz
Horizontal —
TBD (7) —
TBD (7) —
G’s
—
Vertical/Horizontal
—
34
—
grams
—
Meets UL 94V-O
Notes: (1) The outputs, Vo1 and Vo2, have similar characteristics. The applicable performance parameters are defined according to output voltage.
(2) The minimum output current applies to each output. The module will operate at no load with reduced specifications.
(3) A short-circuit load fault at either output causes the module to continuously reset, affecting both outputs.
(4) 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