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NCP1521BSNT1G

P1-P3P4-P6P7-P9P10-P12P13-P14
NCP1521B
http://onsemi.com
4
ELECTRICAL CHARACTERISTICS (Typical values are referenced to T
A
= +25°C, Min and Max values are referenced −40°C to +85°C
ambient temperature, unless otherwise noted, operating conditions V
IN
= 3.6 V, V
OUT
= 1.2 V, unless otherwise noted.)
Rating
Pin
Symbol Min Typ Max Unit
TSOP UDFN
VIN PIN
Input Voltage Range
1 3 V
IN
2.7 − 5.5 V
Quiescent Current, PFM No Switching 1 3 I
q
ON
− 30 45 mA
Standby Current, EN Low 1 3 I
q
OFF
− 0.2 1.5 mA
Undervoltage Lockout (V
IN
Falling) 1 3 V
UVLO
2.2 2.4 2.55 V
EN PIN
Positive going Input High Voltage Threshold, EN0 Signal 3 1 V
IH
1.2 − − V
Negative going Input High Voltage Threshold, EN0 Signal 3 1 V
IL
− − 0.4 V
EN High Input Current, EN = 3.6 V 3 1 I
ENH
− 2.0 − mA
OUTPUT
Output Voltage Accuracy (Note 6)
Ambient Temperature
Overtemperature Range
V
OUT
−
−3.0
$1.0
$2.0
−
3.0
%
Feedback Voltage Threshold 4 6 V
FB
− 0.6 − V
Minimum Output Voltage V
OUT
− 0.9 − V
Maximum Output Voltage V
OUT
− 3.3 − V
Maximum Output Voltage for USB or 5 V Rail Powered Applications
Vin from 4.3 V to 5.5 V (Note 7)
V
OUT
− 3.9 −
V
Output Voltage load regulation Overtemperature
I
OUT
= 100 mA to 600 mA
V
OUT
−
−
0.0005
−
−
−
%/mA
Load Transient Response, Rise/Falltime 1 ms
10 mA to 100 mA Load Step
200 mA to 600 mA Load Step
V
OUT
−
−
35
80
−
−
mV
Output Voltage Line Regulation, I
OUT
= 100 mA,
V
IN
= 2.7 V to 5.5 V
V
OUT
− 0.05 −
%
Line Transient Response, I
OUT
= 100 mA,
3.6 V to 3.0 V Line Step (Falltime=50 ms)
V
OUT
− 6 −
mV
PP
Output Voltage Ripple, I
OUT
= 300 mA (PWM Mode) V
OUT
− 2.0 − mV
Output Voltage Ripple, I
OUT
= 0 mA (PFM Mode) V
OUT
− 8.0 − mV
Peak Inductor Current 5 5 I
LIM
− 1200 − mA
Oscillator Frequency 5 5 F
OSC
1.3 1.5 1.8 MHz
Duty Cycle 5 5 − − − 100 %
Soft−Start Time T
START
− 320 500 ms
Thermal Shutdown Threshold T
SD
− 160 − °C
Thermal Shutdown Hysteresis T
SDH
− 25 − °C
POWER SWITCHES
P−Channel On−Resistance RLxH − 400 − mW
N−Channel On−Resistance RLxL − 400 − mW
P−Channel Leakage Current I
LeakH
− 0.05 − mA
N−Channel Leakage Current I
LeakL
− 0.01 − mA
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”.
NCP1521B
http://onsemi.com
5
TABLE OF GRAPHS
Typical Characteristics for Step−down Converter Figure
I
STB
Standby Current vs. Input Voltage 7
I
q
Quiescent Current, PFM No Switching vs. Input Voltage 8
V
OUT
Output Voltage Accuracy vs. Temperature 9 and 10
Eff Efficiency vs. Output Current 11, 12, 13 and 29
Freq Switching Frequency vs. Input Voltage 14
V
OUT
Soft−Start vs. Time 15
V
OUT
Short Circuit Protection vs. Time 16
V
OUT
Line Regulation vs. Input Voltage 17 and 18
V
OUT
Line Transient vs. Time 19 and 20
V
OUT
Load Regulation vs. Output Current 21, 22 and 30
V
OUT
Load Transient vs. Time 23, 24, 25 and 26
0
0.1
0.2
0.3
0.4
0.5
0.6
0.7
0.8
0.9
1.0
2.7 3.2 3.7 4.2 4.7 5.2
Figure 7. Shutdown Current vs. Supply Voltage
I
STB
(mA)
V
IN
, INPUT VOLTAGE (V)
EN = 0 V
I
OUT
= 0 mA
29
30
31
32
33
34
35
2.5 3.0 3.5 4.0 4.5 5.0 5.5
Figure 8. Quiescent Current PFM No Switching
vs. Supply Voltage
QUIESCENT CURRENT (mA)
V
IN
, INPUT VOLTAGE (V)
EN = V
IN
I
OUT
= 0 mA
NCP1521B
http://onsemi.com
6
−1.0%
−0.5%
0%
0.5%
1.0%
−40 0 40 80
ACCURACY (%)
Figure 9. Output Voltage Accuracy vs. Temperature
(V
IN
= 3.6 V, V
OUT
= 1.2 V)
TEMPERATURE (°C)
I
OUT
= 600 mA
I
OUT
= 30 mA
−1.0%
−0.5%
0%
0.5%
1.0%
−40 0 40 80
ACCURACY (%)
Figure 10. Output Voltage Accuracy vs. Temperature
(V
OUT
= 1.2 V, I
OUT
= 200 V)
TEMPERATURE (°C)
V
IN
= 5.5 V
V
IN
= 2.7 V
V
IN
= 3.6 V
50%
55%
60%
65%
70%
75%
80%
85%
90%
95%
100%
0 100 200 300 400 500 600
EFFICIENCY (%)
Figure 11. Efficiency vs. Output Current
(V
IN
= 3.6 V, T
A
= 255C)
I
OUT
, OUTPUT CURRENT (mA)
I
OUT
= 30 mA
V
OUT
= 0.9 V
V
OUT
= 1.8 V
V
OUT
= 3.3 V
50%
55%
60%
65%
70%
75%
80%
85%
90%
95%
100%
0 100 200 300 400 500 600
EFFICIENCY (%)
Figure 12. Efficiency vs. Output Current
(V
OUT
= 1.2 V, T
A
= 255C)
I
OUT
, OUTPUT CURRENT (mA)
V
IN
= 5.5 V
V
IN
= 3.6 V
V
IN
= 2.7 V
50%
55%
60%
65%
70%
75%
80%
85%
90%
95%
100%
0 100 200 300 400 500 600
EFFICIENCY (%)
Figure 13. Efficiency vs. Output Current
(V
IN
= 3.6 V, V
OUT
= 1.2 V)
I
OUT
, OUTPUT CURRENT (mA)
−40°C
85°C
25°C
1.3
1.4
1.5
1.6
1.7
1.8
2.7 3.2 3.7 4.2 4.7 5.2
FREQUENCY (MHz)
Figure 14. Switching Frequency vs. Input
Voltage (V
OUT
= 1.2 V, I
OUT
= 300 mA)
V
IN
, INPUT VOLTAGE (V)
25°C
85°C
−40°C
P1-P3P4-P6P7-P9P10-P12P13-P14

NCP1521BSNT1G

Mfr. #:
Buy NCP1521BSNT1G
Manufacturer:
ON Semiconductor
Description:
Switching Voltage Regulators STEP DWN DCDC CNVRTR 1.5MHz 600mA
Lifecycle:
New from this manufacturer.
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