XRP7662 Datasheet, PDF (2/19 Pages) Exar Corporation – 12A 300KHz Synchronous Step Down Regulator

XRP7 66 2
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1 2 A 3 0 0 KHz Sy n ch r on ou s St ep Dow n Reg u lat or
ABSOLUTE MAXIMUM RAT INGS
These are stress ratings only and functional operation of
the device at these ratings or any other above those
indicated in the operation sections of the specifications
below is not implied. Exposure to absolute maximum
rating conditions for extended periods of time may affect
reliability.
VCC ................................
................................
...... 7.0V
VIN ................................
................................
........ 25V
BST ................................
................................
...... 30V
LX- BST................................
..................... - 0.3V to 7.0V
LX ................................
...............................
- 1V to 30V
All other pins ................................
... - 0.3V to (V CC+0.3)V
Storage Temperature ..............................
- 65°C to 150°C
Power Dissipation ..................... Internally Limited via OTP
Lead Temperature (Soldering, 10 sec) .................... 300°C
ESD Rating (HBM - Human Body Model) ..........................
LX, VINP , PGND................................
................... 400 V
All other pins ................................
....................... 2kV
OPERATING RATINGS
Input Voltage Range V CC ..............................
Inpu t Voltage Range V IN ................................
Junction Temperature Range ....................
7KHUPDO5HVJLC .V....W...D....Q...F....H.......LJ......
7KHUPDO5HVJLA .V....W...D....Q...F....H.......LJ......
4.5 V to 5.5V
.. 3V to 22V
- 40°C to 1 25 °C
........ 5°C/W
...... 36°C/W
ELECTRICAL SPECIFICA TIONS
Specifications with standard type are for
an Operating Junction Temperature of
TJ = 25°C only; limits applying over the full
Operating Junction Temperature range are de
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design, or statistical correlation. Typical values represent the most likely parametric norm at T
J = 25°C, and are provided for
reference purposes only. Unless otherwise indicated,
4.5 V < VCC < 5.5 V, 3V < VIN < 22 V, BST = LX + 5V, UVIN = 3V, CVCC =
1µF, CCOMP = 0. 1µF , CSS = 50n F.
Parameter
Quiescent Current
VIN Supply Current
(No switching)
VIN Supply Current
(S witching)
BST Supply Current
(No switching)
BST Supply Current (switching)
Protection: UVLO
VCC UVLO Start Threshold
VCC UVLO Hysteresis
UVIN Start Threshold
UVIN Hysteresis
Error Amplifier Reference
Error Amplifier Reference
Error Amplifier Reference Over
Line
COMP Sink Current
COMP Source Current
VFB Input Bias Current
COMP Clamp
COMP Clamp Temp.
Coefficient
Min.
Typ.
Max.
Units
Conditions
4.00
100
2.30
200
0.792
0.784
70
- 230
3.2
1.5
8
0.2
3
4.25
200
2.50
300
0.800
0.800
150
- 150
50
3.5
- 2.0
3.0
20
0.4
6
4.5
300
2.65
400
0.808
0.816
230
- 70
200
3.8
mA
mA
mA
mA
V
mV
V
mV
V
V
µA
µA
nA
V
mV/°C
‡ V_FB= 0.9V
‡ V_FB= 0.9V
‡
‡
‡ UVIN Ri sing
‡ UVIN Falling
2X Gain Config., Measure V
‡
FB; V CC=5V
‡ V_FB=0.9V, COMP=0.9V
‡ V_FB=0.9V, COMP=0.9V
‡ V_FB=0.8V
VFB=0.7V, T A=25°C
© 2012 Exar Corporation
2/ 19
Rev. 2. 2.0