XR79115 Datasheet, PDF (2/19 Pages) Exar Corporation – 22V, 15A Synchronous Step Down COT Power Module

XR79115
Absolute Maximum Ratings
Stresses beyond the limits listed below may cause perma-
nent damage to the device. Exposure to any Absolute Max-
imum Rating condition for extended periods may affect
device reliability and lifetime.
PV_IN, V_IN...................................................................-0.3V to 25V
V_CC...........................................................................-0.3V to 6.0V
BST..........................................................................-0.3V to 31V¹
BST-SW.......................................................................-0.3V to 6V
SW, ILIM...................................................................-1V to 25V^{1, 2}
ALL other pins.................................................-0.3V to VCC+0.3V
Storage Temperature...........................................-65°C to +150°C
Junction Temperature..........................................................150°C
Power Dissipation...............................................Internally Limited
Lead Temperature (Soldering, 10 sec)......................260°C MSL3
ESD Rating (HBM - Human Body Model)...............................2kV
Operating Conditions
PV_IN...............................................................................3V to 22V
V_IN..............................................................................4.5V to 22V
V_CC............................................................................4.5V to 5.5V
SW, ILIM.....................................................................-1V to 22V¹
PGOOD, V_CC, T_ON, SS, EN, FB...............................-0.3V to 5.5V
Switching Frequency......................................400kHz to 600kHz³
Junction Temperature Range..............................-40°C to +125°C
JEDEC51 Package Thermal Resistance, _JA................15.4°C/W
Package Power Dissipation at 25°C.......................................6.5W
Note 1: No external voltage applied.
Note 2: SW pin’s minimum DC range is -1V, transient is -5V for less than
50ns.
Note 3: Recommended frequency for optimum performance
Electrical Characteristics
Unless otherwise noted: T_J= 25°C, V_IN=12V, BST=V_CC, SW=AGND=PGND=0V, C_VCC=4.7uF. Limits applying over the full
operating temperature range are denoted by a “•”
Symbol
Parameter
Conditions
Min
Typ
Max
Power Supply Characteristics
V_IN
Input Voltage Range
VCC regulating
VCC tied to VIN

5
22

4.5
5.5
I_VIN
I_VCC
VIN Input Supply Current
VCC Quiescent Current
Not switching, V_IN = 12V, V_FB = 0.7V

Not switching, V_CC=V_IN = 5V, V_FB = 0.7V

0.7
2
0.7
2
I_VIN
VIN Input Supply Current
f=500kHz, R_ON=61.9k, VFB=0.58V
17
I_OFF
Shutdown Current
Enable = 0V, V_IN = 12V
1
Enable and Under-Voltage Lock-Out UVLO
V_{IH_EN}
EN Pin Rising Threshold

1.8
1.9
2.0
V_{EN_HYS}
V_{IH_EN}
EN Pin Hysteresis
EN Pin Rising Threshold for DCM/
CCM operation
50

2.8
3.0
3.1
V_{EN_HYS} EN Pin Hysteresis
100
Units
V
mA
mA
mA
μA
V
mV
V
mV
© 2014 Exar Corporation
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exar.com/XR79115
Rev 1B