ncp1521b ON Semiconductor, ncp1521b Datasheet - Page 4

• Manufacturer Part Number: ncp1521b
• Description: 1.5 Mhz, 600 Ma Stepdown Dcdc Converter
• Manufacturer: ON Semiconductor

6. The overall output voltage tolerance depends upon the accuracy of the external resistor (R1, R2).
7. Functionality guaranteed per design and characterization, see chapter ”USB or 5 V Rail Powered Applications”.
ELECTRICAL CHARACTERISTICS
ambient temperature, unless otherwise noted, operating conditions V
VIN PIN
EN PIN
OUTPUT
POWER SWITCHES
Input Voltage Range
Quiescent Current, PFM No Switching
Standby Current, EN Low
Undervoltage Lockout (V
Positive going Input High Voltage Threshold, EN0 Signal
Negative going Input High Voltage Threshold, EN0 Signal
EN High Input Current, EN = 3.6 V
Output Voltage Accuracy (Note 6)
Ambient Temperature
Overtemperature Range
Minimum Output Voltage
Maximum Output Voltage
Maximum Output Voltage for USB or 5 V Rail Powered Applications
Vin from 4.3 V to 5.5 V (Note 7)
Output Voltage load regulation Overtemperature
I
Load Transient Response, Rise/Falltime 1 ms
10 mA to 100 mA Load Step
200 mA to 600 mA Load Step
Output Voltage Line Regulation, I
V
Line Transient Response, I
3.6 V to 3.0 V Line Step (Falltime=50 ms)
Output Voltage Ripple, I
Output Voltage Ripple, I
Peak Inductor Current
Oscillator Frequency
Duty Cycle
Soft-Start Time
Thermal Shutdown Threshold
Thermal Shutdown Hysteresis
P-Channel On-Resistance
N-Channel On-Resistance
P-Channel Leakage Current
N-Channel Leakage Current
OUT
IN
= 2.7 V to 5.5 V
= 100 mA to 600 mA
OUT
OUT
IN
OUT
Falling)
= 300 mA (PWM Mode)
= 0 mA (PFM Mode)
= 100 mA,
Rating
OUT
= 100 mA,
(Typical values are referenced to T
http://onsemi.com
NCP1521B
IN
4
= 3.6 V, V
TSOP UDFN
1
1
1
1
3
3
3
5
5
5
A
Pin
= +25°C, Min and Max values are referenced -40°C to +85°C
OUT
3
3
3
3
1
1
1
5
5
5
= 1.2 V, unless otherwise noted.)
Symbol
T
V
I
I
RLxH
I
V
V
V
V
V
V
V
V
V
V
F
RLxL
T
I
q OFF
LeakH
I
START
LeakL
T
q ON
I
V
UVLO
V
ENH
V
OSC
OUT
OUT
OUT
OUT
OUT
OUT
OUT
OUT
OUT
OUT
LIM
SDH
-
SD
IN
IH
IL
-3.0
Min
2.7
2.2
1.2
1.3
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
0.0005
$1.0
$2.0
1200
0.05
0.05
0.01
Typ
320
160
400
400
0.2
2.4
2.0
0.9
3.3
3.9
2.0
8.0
1.5
30
35
80
25
-
-
-
-
6
-
Max
2.55
100
500
5.5
1.5
0.4
3.0
1.8
45
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
%/mA
mV
MHz
Unit
mV
mV
mV
mA
mW
mW
mA
mA
mA
mA
mA
ms
°C
°C
%
%
%
V
V
V
V
V
V
V
PP