XRP7659 Datasheet, PDF (2/10 Pages) Exar Corporation – 1.5A 18V1.4MHz Non Synchronous Step-Down Regulator

XRP7 65 9
1 .5 A 1 8 V 1 .4 MHz Non 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.
VIN ................................
............................
- 0.3V to 2 0V
VEN ................................
.................... - 0.3V to VIN +0.3 V
VSW ................................
................................
....... 21 V
VBS................................
....................... - 0.3V to VSW+6 V
VFB ................................
..............................
- 0.3V to 6 V
Operating Junction Temperature ............................ 150°C
Storage Temperature ..............................
- 65°C to 150°C
Lead Temperature (Soldering, 10 sec) .................... 26 0°C
Power Dissipation ................................
Internally Limited
ESD Rating (HBM - Human Body Model) .................... 2kV
ESD Rating (MM - Machine Model) ........................... 500V
OPERATING RATINGS
Input Voltage Range V IN ................................
4.5V to 18 V
Maximum Output Current I OUT (Min) ......................... 1.5A
Ambient Temperature Range ................... - 40°C to + 85 °C
7KHUPDO5HVJLA .V....W...D....Q...F....H.......LJ......
..... 220 °C/W
ELECTRICAL SPECIFICA TIONS
Specifications are for an Operating Junction Temperature of T
J = 25°C only; limits applying over the full Operating Junction
7HPSHUDWXUHUDQJHDUHGHQRWHGE\D³‡´0LQteLePd XthrPoughDtQesGt, de0sigDn,[oLr sPtaXtisPtical OLPLWVDUH
correlation. Typical values represent the most likely parametric norm at T
J = 25°C, and are provided for reference purposes
only. Unless otherwise indicated, V IN = VEN = 12V, V OUT = 3.3V .
Parameter
VIN , Input Voltage
I Q, Quiescent Current
I SHDN, Shutdown Supply Current
VFB, Feedback Voltage
VFBOV, Feedback Overvoltage Threshold
I FB, Feedback Bias Current
RDSON, Switch On - resistance ⁽¹⁾
I LEAK, Switch Leakage Current
I LIM , Switch Current Limit
VENH, EN Pin Threshold
VENL, EN Pin Threshold
VUVLO, Input UVLO Threshold
VHYS, Input UVLO Hysteresis
fOSC1, Oscillator frequency
fOSC2, Oscillator frequency
DMAX, Maximum Duty Cycle
DMIN , Minimum Duty Cycle
t ON, Minimum On Time ⁽¹⁾
TOTSD, Thermal Shutdown ⁽¹⁾
THYS, Thermal Shutdown Hysteresis ⁽¹⁾
t SS, Soft - start time ⁽¹⁾
Min.
4.5
0.785
- 0.1
1.8
1.5
3.3
1.1
Typ.
0.8
0.1
0.810
0.972
0.35
0.1
2.4
3.8
0.2
1.4
460
90
100
160
20
200
Note 1: RDSON, t ON, T OTSD, T HYS and t SS are guaranteed by design.
Max.
18
1.1
1.0
0.835
+0.1
10
0.4
4.3
1.7
0
Units
V
mA
µA
V
V
µA
Ÿ
µA
A
V
V
V
V
MHz
kHz
%
%
ns
°C
°C
µs
Conditions
‡
VFB=0.9V
VEN=0V
VFB=0.85V
I SW=1A
VIN =18V, V EN=0V
VIN Rising
Short Circuit
VFB=0.6V
VFB=0.9V
© 2012 Exar Corporation
2/ 10
Rev. 1. 2.0