PT7681 Datasheet, PDF (3/12 Pages) Texas Instruments – 30-A Programmable ISR With Margin Up/Down Controls

PT7681—5V
30-A Programmable ISR
With Margin Up/Down Controls
Typical Characteristics
SLTS177B - DECEMBER 2002 - REVISED JULY 2006
Specifications (Unless otherwise stated, T_a =25°C, V_in =5V, C_in =1,500µF, C_out =330µF, V_o =3.3V, and I_o =I_omax)
PT7681
Characteristics
Symbols
Conditions
Min
Typ
Max
Units
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
Over-Current Threshold
Output Margin Adjust
Switching Frequency
STBY* Input Requirements
Input High Voltage
Input Low Voltage
Input Low Current
Standby Input Current
External Capacitance
Operating Temperature Range
Solder Reflow Temperature
Storage Temperature
Mechanical Shock
Mechanical Vibration
Weight
Flammability
Io
Vin
Vo tol
Reg_temp
Regline
Regload
. Vo tol
.
Vr
ttr
Vos
ITRIP
Vo adj
ƒs
VIH
VIL
IIL
Iin standby
C_out
Ta
Treflow
Ts
—
—
—
—
Ta = 60°C, 200LFM, pkg N
0
Ta = 25°C, Natural convection
0
Over Io range
4.5
All output voltages
—
–40°C =T_a =+85°C, I_o =I_omin
—
Over Vin range
—
Over Io range
Includes set-point, line, load,
–40°C =Ta =+85°C
Io =15A
—
—
Vo =3.3V —
Vo =2.5V —
Vo =1.8V —
Io =30A
Vo =3.3V —
Vo =2.5V —
Vo =1.8V —
20MHz bandwidth
—
1A/µs load step, 50% and 100% Iomax
—
Vo over/undershoot
—
Reset followed by auto-recovery
—
Pin 6 or 26 connected to pin 12
—
Over Vin range
250
Referenced to GND
Pin 5 to GND
Pin 5 to GND
Over Vin Range
Surface temperature of module pins or case
—
Per Mil-STD-883D, Method 2002.3
1 msec, Half Sine, mounted to a fixture
Mil-STD-883D, Method 2007.2
Suffix A
20-2000 Hz
Suffixes N,C
Vertical/Horizontal
Materials meet UL 94V-0
2.0
-0.2
—
—
330 (4)
–40
—
–40
—
—
—
—
—
—
—
±10
±1
±5
±5
±1.5
93
92
89
90
87
83
40
25
±200 (2)
38
±5
300
—
—
0.3
6
—
—
—
—
500
20 (7)
TBD (7)
36
30
29
5.5
±25 ⁽¹⁾
—
—
—
A
V
mV
%V_o
mV
mV
±3
%Vo
—
—
%
—
—
—
%
—
—
mVpp
—
µSec
—
mV
—
A
—
%
350
kHz
Open (3)
0.8
—
—
15,000
85 (5)
215 (6)
125
—
—
—
—
V
mA
mA
µF
°C
°C
°C
G’s
G’s
grams
Notes: (1) If the remote sense ground is not used, pin 12 must be connected to pin 13 for optimum output voltage accuracy.
(2) The transient response may be improved by placing additional capacitors with low equivalent series resistance (ESR) on the output.
(3) The STBY* control (pin 5) has an internal pull-up. If it is left open-circuit, the module will operate when input power is applied. A low-leakage (<1µA)
MOSFET must be used to control this pin. The open-circuit voltage may be as high as Vin.
(4) For operation below 0°C, Cin and Cout must have stable characteristics. Use either low ESR tantalum or Oscon® capacitors.
(5) See safe Operating Area curves or consult factory for the appropriate derating.
(6) During reflow of SMD package version do not elevate the module case, pins, or internal component temperatures above a peak of 215°C. For further
guidance refer to the application note, “Reflow Soldering Requirements for Plug-in Power Surface Products,” (SLTA051).
(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.
External Capacitors: The regulator require a minimum output capacitance of 330µF for proper operation. An input capacitance of 1500µF is also required. This
must be rated for a minimum of 1.1Arms of ripple current. For transient or dynamic load applications, additional capacitance may be required. For further informa-
tion 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 30ADC with a typical value of 1µH.
For technical support and more information, see inside back cover or visit www.ti.com