NCP1521BSNT1G ON Semiconductor, NCP1521BSNT1G Datasheet - Page 2

IC CONV DC-DC STEPDOWN SOT23-5

NCP1521BSNT1G

Manufacturer Part Number
NCP1521BSNT1G
Description
IC CONV DC-DC STEPDOWN SOT23-5
Manufacturer
ON Semiconductor
Type
Step-Down (Buck)r
Datasheet

Specifications of NCP1521BSNT1G

Internal Switch(s)
Yes
Synchronous Rectifier
Yes
Number Of Outputs
1
Voltage - Output
0.9 ~ 3.9 V
Current - Output
600mA
Frequency - Switching
1.5MHz
Voltage - Input
2.7 ~ 5.5 V
Operating Temperature
-40°C ~ 85°C
Mounting Type
Surface Mount
Package / Case
TSOT-23-5, TSOT-5, TSOP-5
Mounting Style
SMD/SMT
Duty Cycle (max)
100 %
Efficiency
90 %
Input / Supply Voltage (max)
3.9 V
Output Current
600 mA
Output Voltage
3.3 V
Switching Frequency
1.5 MHz
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Power - Output
-
Lead Free Status / Rohs Status
Lead free / RoHS Compliant
Other names
NCP1521BSNT1GOSTR

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NCP1521BSNT1G
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V
Enable
battery
4.7 mF
GND
VIN
EN
1
2
3
SHUTDOWN
& THERMAL
CONTROL
100%
95%
90%
85%
80%
75%
70%
65%
60%
55%
50%
LOGIC
0
CONTROL
PWM/PFM
Figure 4. Simplified Block Diagram
100
Figure 3. Efficiency vs. Output Current
REFERENCE
VOLTAGE
200
Q1
I
LIMIT
http://onsemi.com
Q2
300
I
OUT
2
(mA)
400
500
LX
FB
5
4
V
V
T
A
OUT
IN
= 25°C
600
= 4.2 V
= 3.3 V
2.2 mH
700
10 mF
R1
R2
18 pF

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