ncp1521 ON Semiconductor, ncp1521 Datasheet - Page 4

• Manufacturer Part Number: ncp1521
• Description: 1.5 Mhz, 600 Ma, Highefficiency, Low Quiescent Current, Adjustable Output Voltage Stepdown Converter
• Manufacturer: ON Semiconductor

5. The overall output voltage tolerance depends upon the accuracy of the external resistor (R1, R2).
ELECTRICAL CHARACTERISTICS
+85°C ambient temperature, unless otherwise noted, operating conditions V
Input Voltage Range
Undervoltage Lockout (V
Quiescent Current
Standby Current, EN Low
Oscillator Frequency
Peak Inductor Current
Feedback Reference Voltage
FB Pin Tolerance Overtemp @ I
Reference Voltage Line Regulation
Output Voltage Accuracy @ I
Minimum Output Voltage
Maximum Output Voltage
Output Voltage Line Regulation (V
Voltage Load Regulation
Load Transient Response (300 mA to 600 mA Load Step, Trise 10 ms)
Duty Cycle
P-Ch On-Resistance
N-Ch On-Resistance
P-Ch Leakage Current
N-Ch Leakage Current
Enable Pin High
Enable Pin Low
EN << H >> Input Current, EN = 3.6 V
Soft-Start Time
Thermal Shutdown Threshold
Thermal Shutdown Hysteresis
PFM No Load
Io = 100 mA
(IO = 100 mA to 300 mA)
(IO = 100 mA to 600 mA)
IN
Falling)
out
Characteristic
out
= 100 mA (Note 5)
in
= 100 mA
= 2.7–5.5)
(Typical values are referenced to T
http://onsemi.com
NCP1521
4
IN
A
= 3.6 V, V
= +25°C, Min and Max values are referenced -40°C to
V
Symbol
LOADREG
DV
ILeakH
V
VFBtol
ILeakL
VENH
DVFB
VENL
RLxH
V
V
V
V
RLxL
IENH
T
T
F
OUT
T
UVLO
Istb
I
V
V
start
LIM
OUT
OUT
OUT
OUT
SDH
I
osc
-
SD
ref
OUT
IN
q
= 1.8 V, unless otherwise noted.)
-3.0
-3%
Min
2.7
2.3
1.3
1.2
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
0.0005
Vnom
0.001
1200
0.05
0.01
Typ
300
300
350
160
2.5
0.3
1.5
0.6
0.1
0.9
3.3
0.1
2.0
30
50
25
-
-
-
-
-
+3%
Max
100
500
5.5
2.6
1.2
1.8
3.0
0.4
45
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
%/mA
%/mA
MHz
Unit
mW
mW
mA
mV
mA
mA
mA
mA
mA
°C
°C
ms
%
%
%
%
V
V
V
V
V
V
V
V