NCP1521ASNT1G ON Semiconductor, NCP1521ASNT1G Datasheet - Page 2

• Manufacturer Part Number: NCP1521ASNT1G
• Description: IC CONV DC-DC PWM 600MA SOT23-5
• Manufacturer: ON Semiconductor
• Type: Step-Down (Buck)r

Specifications of NCP1521ASNT1G

• Internal Switch(s): Yes
• Synchronous Rectifier: Yes
• Number Of Outputs: 1
• Voltage - Output: 0.9 ~ 3.3 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
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Power - Output: -
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant

Vbattery
Enable
4.7 mF
GND
VIN
EN
1
2
3
SHUTDOWN
& THERMAL
CONTROL
100
LOGIC
90
80
70
60
50
0
CONTROL
PWM/PFM
Figure 2. Efficiency vs. Output Current
Figure 3. Simplified Block Diagram
100
REFERENCE
VOLTAGE
Q1
ILIMIT
http://onsemi.com
200
Q2
NCP1521
I
out
2
300
(mA)
400
V
V
T
A
out
in
LX
FB
= 25°C
5
4
= 4.2 V
= 3.3 V
500
2.2 mH
600
10 mF
R1
R2
18 pF