XRP7675 Datasheet, PDF (2/12 Pages) Exar Corporation – 3A 18V Synchronous PFM/PWM Step-Down Regulator

XRP7 6 7 5
3 A 1 8 V Sy n ch r on ou s PFM/ PW M 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 con ditions for extended periods of time may affect
reliability.
Supply Voltage VIN ................................
...... - 0.3V to 20 V
Switch Node Voltage VSW ................................
......... 21 V
Boost Voltage VBS ................................
... - 0.3 to VSW+6 V
Enable Voltage VEN................................
......... - 0.3 to VIN
All Other Pins ................................
.............. - 0.3 to +6 V
Junction Temperature ................................
.......... 150°C
Storage Temperature ..............................
- 65°C to 150°C
Lead Temperature (Soldering, 10 sec)
................... 26 0°C
ESD Rating (HBM - Human Body Model) .................... 2kV
ESD Rating (MM - Machine Model) ........................... 200V
Moisture Sensitivity Level (MSL) ................................
... 3
OPERATING RATINGS
Input Voltage VIN ................................
......... 4.5V to 18 V
Ambient Operating Temperature ................ - 40°C to 85 °C
Maximum Outp ut Current ................................
.... 3A min
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...... 60 °C/W
ELECTRICAL SPECIFICA TIONS
Specifications are for an Operating Ambient Temperature of T A = 25°C only; limits applying over the full
Ambient Operating
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correlation. Typical values represent the most likely parametric norm at T
A = 25°C, and are provided for reference purposes
only. Unless otherwise indicated, V IN = VEN = 12 V, V OUT=3.3V .
Parameter
Shutdown Supply Current
Quiescent Current
Feedback Voltage VFB
Feedback Overvoltage Threshold
Feedback Bias Current
Error Amplifier Voltage Gain A
1
EA
Error Amplifier
Transconductance G EA
COMP to Current Sense
Transconductance G CS
High - Side switch On Resistance
RDSONH ²
Low - Side switch On Resistance
RDSONL ²
High - Side switch Leakage
Current
High - Side Switch Current Limit
Low - Side Switch Current Limit
Oscillator Frequency FOSC1
Short Circuit Oscillator
Frequency FOSC2
Maximum Duty Cycle DMAX
Minimum Duty Cycle D MIN
Minimum Start - up Current
Minimum No Load Start - up
Voltage
Minimum Full Load Start - up
Voltage
Min.
0.90 7
- 0.1
4.3
28 0
Typ.
0.1
1. 2
0.925
1.1
400
800
5.2
100
100
0.1
5.6
0
340
90
90
10
5
5
Max.
10
1. 4
0.9 43
0.1
10
40 0
0
Units
µA
mA
V
V
µA
V/V
µ A/V
A/V
PŸ
PŸ
µA
A
A
kHz
kHz
%
%
mA
V
V
Conditions
VEN=0V
VEN= 3V, V FB=1V
VFB=1V
I SW=0.2A&0.7A
I SW= - 0.2A& - 0.7A
VIN =18V, V EN=0V, V SW=0V
Drain to Source
VFB=0.85V
VFB=1V
VIN ”9
I OUT=0A
I OUT=3A, V OUT>3.0V
© 2013 Exar Corporation
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Rev. 1.0.0