NCP1547 ON Semiconductor, NCP1547 Datasheet - Page 5

• Manufacturer Part Number: NCP1547
• Description: Buck Regulator
• Manufacturer: ON Semiconductor

4. Guaranteed by design, not 100% tested in production.
ELECTRICAL CHARACTERISTICS (continued)
General
Quiescent Current
Shutdown Quiescent Current
Boost Operating Current
Minimum Boost Voltage
Startup Voltage
Minimum Output Current
V
V
FB
IN
Characteristic
2.9 V LDO
Regulator
Voltage
SHDNB
1.27 V
Comparator
Shutdown
−
1.46 V
+
1.3 V
+
−
SHDNB
Amplifier
+
−
Error
−
+
I
V
V
(Note 4)
SW
SHDNB
BOOST
= 0 A
Figure 2. Block Diagram
∑
V
(0°C < T
= 0 V
− V
C
Comparator
0.32 V
SW
http://onsemi.com
5.0 mA
PWM
−
+
Test Conditions
= 2.5 V
J
Artificial
Ramp
< 70°C, 4.5 V< V
NCP1547
+
−
−
−
5
Limit Foldback
+
−
and Current
Frequency
IN
Oscillator
< 40 V; unless otherwise specified.)
SYNC
Comparator
Current
Limit
I
FOLDBACK
−
+
S
R
Q
Shutdown
Min
6.0
2.2
Thermal
−
−
−
−
I
REF
Output
Driver
Typ
4.0
1.0
3.3
7.0
15
−
Max
7.5
5.0
2.5
4.4
40
12
V
GND
BOOST
mA/A
SW
Unit
mA
mA
mA
V
V