XR79203 Datasheet, PDF (3/19 Pages) Exar Corporation – 40V, 3A Synchronous Step-Down

XR79203
Electrical Characteristics (Continued)
T_J = 25°C, V_IN = 24V, 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
•
Reference Voltage
V_REF
Reference voltage
DC load regulation
DC line regulation
Programmable Constant On-Time
t_ON(MIN)
Minimum programmable on-time
t_ON1
t_ON2
On-time 1
On-time 2
On-time 2 frequency
T_OFF(MIN) Minimum off-time
Diode Emulation Mode
Zero crossing threshold
Soft-Start
SS charge current
SS discharge current
V_CC Linear Regulator
V_CC output voltage
Power Good Output
Power good threshold
Power good hysteresis
Power good sink current
V_IN = 5V to 40V, V_CC regulating
•
CCM operation, closed loop,
applies to any C_OUT
R_ON = 14kΩ, V_IN = 40V
R_ON = 14kΩ, V_IN = 24V
•
R_ON = 35.7kΩ, V_IN = 24V
•
R_ON = 35.7kΩ, V_IN = 24V, V_OUT = 5.0V, I_OUT = 3A
•
DC value measured during test
•
Fault present
•
V_IN = 6V to 40V, I_LOAD = 0 to 30mA
•
V_IN = 5V, I_LOAD = 0 to 20mA
•
Min
0.596
0.594
180
420
425
-14
1
4.8
4.51
-10
1
Typ
0.600
0.600
±0.1
±0.2
120
200
470
470
250
-2
-10
5.0
4.8
-7
1.5
Max
0.604
0.606
220
520
525
350
-6
5.2
-5
4
Units
V
V
%
%
ns
ns
ns
kHz
ns
mV
µA
mA
V
%
%
mA
REV1B
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