NCP1593A, NCP1593B
http://onsemi.com
4
ELECTRICAL CHARACTERISTICS (−40°C < T
J
< 125°C, V
CC
= 4.0 V − 5.5 V, for min/max values unless noted otherwise)
Parameter
Symbol Test Conditions Min Typ Max Unit
Input Voltage Range V
IN
4.0 5.5 V
V
CC
UVLO Threshold V
UVLO
2.4 2.5 2.9 V
UVLO Hysteresis V
UVLO_hys
320 mV
V
CC
Quiescent Current I
INVCC
1.0 1.5 mA
VCCP Quiescent Current I
INVCCP
20 50
mA
Shutdown Supply Current I
QSHDN
1.8 3.0
mA
FEEDBACK VOLTAGE
Reference Voltage
V
FB
0.591 0.6 0.609 V
Reference Voltage V
FB
T
J
= 25°C 0.594 0.6 0.606 V
Feedback Input Bias Current I
FB
10 100 nA
Feedback Voltage Line Regulation (Note 3) V
CC
= 4.0 V to 5.5 V −65 dB
PWM
Maximum Duty Cycle (Regulating)
d.c.
MAX
95 %
Maximum Duty Cycle (LDO mode) d.c.
LDO
Vout > d.c.
MAX
* V
IN
100 %
Minimum Controllable On Time t
ONmin
35 ns
Current Limit
Cycle-by-cycle Current Limit (Note 3)
I
LIM
V
CC
= 5.0 V, T
J
= 25°C 5.1 A
Oscillator
Switching Frequency
f
SW
0.87 1.0 1.13 MHz
MOSFET’s
High-Side MOSFET On Resistance
R
DSonH
I
DS
= 100 mA, V
IN
= 5.0 V 90 190
mW
High-Side MOSFET Leakage I
lkgH
LX = 0 V 10
mA
Low-Side MOSFET On Resistance R
DSonL
I
DS
= 100 mA, V
IN
= 5.0 V 60 90
mW
Low-Side MOSFET Leakage I
lkgL
LX = 5 V 10
mA
POWER GOOD
Power Good Rising Threshold
V
PGH
0.51 0.54 V
Power Good Falling Threshold V
PHL
0.48 0.51 V
Power Good Hysteresis (High-to-Low) V
PGhys
30 mV
Power Good Pulldown Voltage V
RPG
I
PG
= 2.5 mA 130 250 mV
ENABLE
Enable High Threshold
V
ENHI
1.4 V
Enable Low Threshold V
ENLO
0.4 V
Enable Hysteresis V
ENhys
200 mV
Enable Pullup Current I
EN
1.4 3.0
mA
Soft-Start
Default Soft-start Ramp Time
t
SS
SS = open; f
SW
= 1MHz 0.5 0.58 0.65 ms
Maximum Soft-start Ramp time t
SS
SS = max cap; f
SW
= 1MHz 10 ms
Hiccup Timer 4 * t
SS
ms
Soft-start Current I
SS
0.51 0.7 0.87
mA
Thermal Shutdown
Thermal Shutdown Threshold
185 °C
Thermal Shutdown Hysteresis 30 °C
3. Guaranteed by Characterization.
