PT8125 Datasheet, PDF (5/10 Pages) Texas Instruments – 30-A 12-V Input Programmable Integrated Switching Regulator

PT8120 Series
30-A 12-V Input Programmable
Integrated Switching Regulator
PT8124 Specifications (Unless otherwise stated T_a =25°C, C_in =1,500µF, C_out =660µF, V_in =12V, & I_o = I_omax )
PT8124 Only
Characteristics
Symbols
Conditions
Min
Typ
Max
Units
Output Current
Input Voltage Range
Set-Point Voltage Tolerance
Line Regulation
Load Regulation (Droop)
Temperature Variation
Total Output Voltage Variation
Efficiency
Vo Ripple (pk-pk)
Transient Response
Over-Current Threshold
Switching Frequency
Standby Control (pin 6)
Input High Voltage
Input Low Voltage
Input Low Current
Standby Input Current
External Output Capacitance
External Input Capacitance
Operating Temperature Range
Storage Temperature
Mechanical Shock
Io
Vin
Vo tol
∆Reg_line
∆Regload
∆Regtemp
∆Votot
η
Vr
ttr
∆Vtr
ITRIP
ƒs
VIH
VIL
IIL
Iin standby
Cout
Cin
Ta
T_s
Natural convection or
60°C with 200LFM airflow
0.1 (1)
—
Over Io Range
Over Vo range, Io =0.5A
Over V_in range
Over Io range
–40°C ≤Ta ≤85°C, , Io =0.5A
Includes set-point, line, load
–40°C ≤Ta ≤ 85°C
Io =15A
Io =Iomax
20MHz bandwidth
10.8
—
—
±1
—
±10
—
2
—
±0.5
—
—
Vo =1.8V —
86
Vo =1.5V —
84
Vo =1.2V —
81
Vo =1.8V —
84
Vo =1.5V —
82
V_o =1.2V —
78
—
20
1A/µs load step, 50% to 100% Iomax
—
50
Vo over/undershoot
Reset followed by auto-recovery
—
50
—
47
Over load range
300
350
Referenced to GND (pins 17–22)
Pin 6 to GND
—
—
-0.2
—
—
0.5
Pin 6 to GND
—
35
See PT8124 application schematic
660 (4) —
See PT8124 application schematic
1,500
—
Over Vin Range
—
–40 ⁽⁵⁾ —
-40
—
Per Mil-STD-883D, Method 2002.3
1 msec, Half Sine, mounted to a fixture
—
500
30
13.2
±2
—
—
—
85 (2)
—
—
—
—
—
—
—
—
—
—
400
A
V
%V
mV
mV/A
%Vo
mV
%
%
mV
µSec
mV
A
kHz
Open (3)
0.8
V
—
mA
—
mA
30,000 µF
—
µF
+85 ⁽⁶⁾
°C
+125
°C
—
G’s
Mechanical Vibration
Weight
Flammability
Mil-STD-883D, Method 2007.2
20-2000 Hz, soldered in PCB
—
Vertical/Horizontal
—
Materials meet UL 94V-0
—
20 (7)
—
G’s
—
55
—
grams
Notes: (1) ISR-will operate down to no load with reduced specifications.
(2) Total output voltage variation includes load regulation droop, which is required for compliance with specification VRM 8.5-4
(3) The Standby input (pin 6) has an internal pull-up. If it is left open-circuit the PT812x will operate when input power is applied. A low-leakage
MOSFET is recommended to control this input. The open-circuit voltage is nominally 5V. See application notes for interface considerations.
(4) The PT8120 regulators require a minimum of 660µF, low ESR ouput capacitance (1,200µF for standard aluminum electrolytic) for proper operation.
(5) For operation below 0°C, Cout must have stable characteristics. Use either low ESR tantalum or Oscon® capacitors.
(6) See safe Operating Area curves or consult factory for the appropriate derating.
(7) The case pins on the through-hole package types (suffixes N & A) must be soldered. For more information see the applicable package outline drawing.
Input Filter: An input filter inductor is optional for most applications. The inductor must be rated to handle the projected input current. A rating of 10ADC for
Vout ≤3.3V, and 15ADC for Vout ≥4.5V is recommended. 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 consult the application note on capacitor selection.
For technical support and more information, see inside back cover or visit www.ti.com