XR76203 Datasheet, PDF (2/20 Pages) Exar Corporation – 3A/5A/8A Synchronous Step Down COT Regulator

XR76203/5/8
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 43V
V_CC...........................................................................-0.3V to 6.0V
BST..........................................................................-0.3V to 48V¹
BST-SW.......................................................................-0.3V to 6V
SW, ILIM..................................................................-1V to 43V^{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)................................300°C
ESD Rating (HBM - Human Body Model)...............................2kV
Operating Conditions
PV_IN...............................................................................5V to 40V
V_IN.................................................................................5V to 40V
SW, ILIM.....................................................................-1V to 40V¹
PGOOD, V_CC, T_ON, SS, EN, FB...............................-0.3V to 5.5V
Switching Frequency......................................100kHz to 800kHz³
Junction Temperature Range..............................-40°C to +125°C
XR76203 JEDEC51 Package Thermal Resistance, _JA...............28°C/W
XR76205 JEDEC51 Package Thermal Resistance, _JA...............26°C/W
XR76208 JEDEC51 Package Thermal Resistance, _JA...............25°C/W
XR76203 Package Power Dissipation at 25°C......................3.6W
XR76205 Package Power Dissipation at 25°C......................3.8W
XR76208 Package Power Dissipation at 25°C......................4.0W
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
Electrical Characteristics
Unless otherwise noted: T_J= 25°C, V_IN=24V, 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
Power Supply Characteristics
V_IN
Input Voltage Range
I_VIN
VIN Input Supply Current
I_VIN
VIN Input Supply Current (XR76203)
I_VIN
VIN Input Supply Current (XR76205)
I_VIN
VIN Input Supply Current (XR76208)
I_OFF
Shutdown Current
Enable and Under-Voltage Lock-Out UVLO
V_{IH_EN_1} EN Pin Rising Threshold
V_{EN_H_1} EN Pin Hysteresis
V_{IH_EN_2} EN Pin Rising Threshold for DCM/
CCM operation
V_{EN_H_2} EN Pin Hysteresis
VCC regulating
Not switching, V_IN = 24V, V_FB = 0.7V
f=300kHz, R_ON=215k, VFB=0.58V
f=300kHz, R_ON=215k, VFB=0.58V
f=300kHz, R_ON=215k, VFB=0.58V
Enable = 0V, V_IN = 12V
Min
Typ
Max
Units

5.5
40
V

0.7
2
mA
12
mA
15
mA
19
mA
1
μA

1.8
1.9
2.0
V
70
mV

2.8
3.0
3.1
V
100
mV
© 2015 Exar Corporation
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exar.com/XR76203/5/8
Rev 1A