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| XR79106 Datasheet, PDF (3/19 Pages) Exar Corporation – 22V, 6A Synchronous Step-Down | |||
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XR79106
Electrical Characteristics (Continued)
TJ = 25°C, VIN = 12V, BST = VCC, SW = AGND = PGND = 0V, CVCC = 4.7μF, unless otherwise specified. Limits applying
over the full operating temperature range are denoted by a â¢.
Symbol Parameter
Conditions
⢠Min
Reference Voltage
VREF
Reference voltage
DC load regulation
DC line regulation
Programmable Constant On-Time
VIN = 4.5V to 22V, VCC regulating or in dropout
0.597
VIN = 4.5V to 5.5V, VCC tied to VIN
0.596
VIN = 4.5V to 22V, VCC regulating or in dropout ⢠0.594
VIN = 4.5V to 5.5V, VCC tied to VIN
⢠0.594
CCM operation, closed loop, IOUT = 0A to 6A,
applies to any COUT
CCM operation, closed loop, VIN = 4.5V to 22V,
applies to any COUT
TON(MIN)
TON1
Minimum programmable on-time
On-time 1
On-time 1 frequency
TON2
On-time 2
TOFF(MIN) Minimum off-time
Diode Emulation Mode
RON = 6.98kâ¦, VIN = 22V
RON = 6.98kâ¦, VIN = 12V
RON = 6.98kâ¦, VIN = 12V, VOUT = 1.2V,
IOUT = 6A
RON = 16.2kâ¦, VIN = 12V
â¢
157
540
â¢
345
â¢
Zero crossing threshold
DC value measured during test
Soft-Start
SS charge current
â¢
-14
SS discharge current
Fault present
â¢
1
VCC Linear Regulator
VCC output voltage
Power Good Output
VIN = 6V to 22V, ILOAD = 0 to 30mA
VIN = 4.5V, RON = 16.2kâ¦, fSW = 670kHz
â¢
4.8
â¢
4.3
Power good threshold
-10
Power good hysteresis
Power good sink current
1
Typ
0.600
0.600
0.600
0.600
±0.2
±0.2
110
185
620
400
250
-2
-10
5.0
4.4
-7.5
2
Max
0.603
0.604
0.606
0.606
214
730
450
350
-6
5.2
-5
4
Units
V
V
V
V
%
%
ns
ns
kHz
ns
ns
mV
µA
mA
V
V
%
%
mA
REV1B
3/19
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