XR75100 Datasheet, PDF (2/15 Pages) Exar Corporation – 40V Synchronous Step Down COT Controller

XR75100
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.
V_IN.............................................................................-0.3V to 43V
V_CC...........................................................................-0.3V to 6.0V
BST..........................................................................-0.3V to 48V²
BST-SW.......................................................................-0.3V to 6V
SW, ILIM..................................................................-5V to 43V^{1, 2}
GH...................................................................-0.3V to BST+0.3V
GH-SW........................................................................-0.3V to 6V
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).................................300°C
ESD Rating (HBM - Human Body Model)................................2kV
Operating Conditions
V_IN.............................................................................-0.3V to 40V
V_CC...........................................................................-0.3V to 5.5V
SW, ILIM.....................................................................-1V to 40V¹
PGOOD, TON, SS, EN, GL, FB................................-0.3V to 5.5V
Switching Frequency.......................................100kHz to 800kHz³
Junction Temperature Range..............................-40°C to +125°C
Note 1: SW pin’s minimum DC range is -1V, transient is -5V for less than
50ns.
Note 2: No external voltage applied.
Note 3: Recommended
Electrical Characteristics
Unless otherwise noted: T_J= 25°C, V_IN=24V, BST=V_CC, SW=AGND=PGND=0V, CGH=CGL=3.3nF, 4.7uF at VCC-AGND.
Limits applying over the full operating temperature range are denoted by a “•”
Symbol
Parameter
Power Supply Characteristics
V_IN
Input Voltage Range
I_VIN
VIN Input Supply Current
I_OFF
Shutdown Current
Enable and Under-Voltage Lock-Out UVLO
V_{IH_EN}
EN Pin Rising Threshold
V_{EN_HYS} EN Pin Hysteresis
V_{IH_EN}
EN Pin Rising Threshold for DCM/
CCM operation
V_{EN_HYS} EN Pin Hysteresis
VCC UVLO Start Threshold, Rising
Edge
Conditions
VCC regulating
Not switching, V_IN = 24V, VFB = 0.7V
f=300kHz, RON=215k, VFB=0.58V
Enable = 0V, V_IN = 24V
Min
Typ
Max
Units

5.5
40
V

0.7
2
mA
11
mA
0.1
μA

1.8
1.9
2.0
V
50
mV

2.9
3.0
3.1
V
100
mV

4.00
4.25
4.50
V
© 2016 Exar Corporation
2 / 15
exar.com/XR75100
Rev 1C