XR79106 Datasheet, PDF (2/19 Pages) Exar Corporation – 22V, 6A Synchronous Step-Down

XR79106
Absolute Maximum Ratings
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. Stresses beyond those listed under
absolute maximum ratings may cause permanent damage
to the device. Exposure to any absolute maximum 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 31V⁽¹⁾
BST-SW.............................................................. -0.3V to 6V
SW, ILIM......................................................... -1V to 25V⁽¹⁾⁽²⁾
All other pins.......................................... -0.3V to V_CC + 0.3V
Storage temperature..................................... -65°C to 150°C
Junction temperature.................................................. 150°C
Power dissipation....................................... Internally limited
Lead temperature (soldering, 10 seconds)....... 260°C MSL3
ESD rating (HBM – human body model)........................ 2kV
ESD rating (CDM – charged device model)................... 2kV
Operating Conditions
PV_IN.......................................................................3V to 22V
V_IN......................................................................4.5V to 22V
SW, ILIM ........................................................ -1V to 22V⁽¹⁾⁽²⁾
PGOOD, V_CC, TON, SS, EN, FB.................... -0.3V to 5.5V
Switching frequency............................. 600kHz to 800kHz⁽³⁾
Junction temperature range (T_J).................. -40°C to 125°C
Package power dissipation max at 25°C...................... 4.3W
Package thermal resistance θ_JA............................... 23°C/W
NOTES:
1. No external voltage applied.
2. SW pin’s DC range is -1V, transient is -5V for less than 50ns.
3. Recommended frequency for optimum performance.
Electrical Characteristics
T_J = 25°C, V_IN = 12V, BST = V_CC, SW = AGND = PGND = 0V, C_VCC = 4.7μF, unless otherwise specified. Limits applying
over the full operating temperature range are denoted by a •.
Symbol Parameter
Conditions
Power Supply Characteristics
V_IN
Input voltage range
V_CC regulating or in dropout
V_CC tied to V_IN
I_VIN
V_IN supply current
Not switching, V_FB = 0.7V
f = 500kHz, R_ON = 61.9kΩ, V_FB = 0.58V
I_VCC
V_CC quiescent current
Not switching, V_CC tied to V_IN, V_IN = 5V,
V_FB = 0.7V
I_OFF
Shutdown current
Enable = 0V, P_VIN tied to V_IN
Enable and Undervoltage Lock-Out (UVLO)
V_{IH_EN_1} EN pin rising threshold
V_{EN_HYS_1} EN pin hysteresis
V_{IH_EN_2}
EN pin rising threshold for
DCM/CCM
V_{EN_HYS_2} EN pin hysteresis
V_CC UVLO start threshold
V_CC UVLO hysteresis
Rising edge
• Min
Typ
Max Units
•
4.5
22
V
•
4.5
5.5
V
•
0.7
2
mA
9
mA
•
0.7
2
mA
1
µA
•
1.8
1.9
2.0
V
60
mV
•
2.8
3.0
3.1
V
110
mV
• 4.00
4.25
4.40
V
•
150
200
mV
REV1B
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