ncp1550 ON Semiconductor, ncp1550 Datasheet - Page 3

• Manufacturer Part Number: ncp1550
• Description: 600 Khz Pwm/pfm Stepdown Dcdc Controller
• Manufacturer: ON Semiconductor

4. PWM/PFM Switchover ON Time Threshold min/max guaranteed by design only.
ELECTRICAL CHARACTERISTICS
otherwise noted.)
TOTAL DEVICE
OSCILLATOR
OUTPUT DRIVE (PIN 4)
Input Voltage
Output Voltage (I
Input Current into V
Temperature Coefficient
Operating Current (V
Off−State Current (V
Frequency
Frequency Temperature Coefficient (T
Maximum Duty Cycle
PWM/PFM Switchover ON Time Threshold (Note 4)
Soft−Start Delay Time (Note 4)
Protection Delay Time (Auto Restart)
EXT “H” Output Current (V
EXT “L” Output Current (V
EXT “L−H” Rise Time (C
EXT “H−L” Fall Time (C
EXT “L−H” Rise Time (C
EXT “H−L” Fall Time (C
NCP1550SN18T1
NCP1550SN19T1
NCP1550SN25T1
NCP1550SN27T1
NCP1550SN30T1
NCP1550SN33T1
NCP1550SN18T1
NCP1550SN19T1
NCP1550SN25T1
NCP1550SN27T1
NCP1550SN30T1
NCP1550SN33T1
NCP1550SN18T1
NCP1550SN19T1
NCP1550SN25T1
NCP1550SN27T1
NCP1550SN30T1
NCP1550SN33T1
NCP1550SN18T1
NCP1550SN19T1
NCP1550SN25T1
NCP1550SN27T1
NCP1550SN30T1
NCP1550SN33T1
LOAD
OUT
IN
IN
= 0 mA, T
= 5.0 V, V
= 5.0 V, V
LOAD
LOAD
Pin
LOAD
LOAD
EXT
EXT
= 1000 pF) (V
= 5.0 nF) (V
= 1000 pF) (V
= 5.0 nF) (V
Characteristic
= 0.4 V)
= V
A
CE
CE
= 25°C)
IN
= 0 V, T
= 5.0 V, No External Components)
– 0.4 V)
A
= −40°C to 85°C)
(V
IN
IN
IN
IN
A
= 5.0 V)
IN
= 5.0 V)
= 5.0 V, T
= 25°C)
= 5.0 V)
= 5.0 V)
A
http://onsemi.com
= 25°C for typical value, −40°C v T
NCP1550
3
DV
DF
T
Symbol
ON(PFM)
I
OSC
V
OUT/
F
D
I
I
VOUT
T
I
EXTH
EXTL
V
I
OFF
T
OSC
OUT
MAX
DD
T
T
prot
T
T
ss
IN
r
r
f
f
/DT
DV
A
T
A
v 85°C for min/max values unless
1.764
1.862
2.450
2.646
2.940
3.234
2.45
Min
510
100
167
−
−
−
−
−
−
−
−
−
−
−
−
−
−
−
−
−
−
−
−
−
−
−
−
−
−
−
−
0.11
Typ
100
600
320
−60
100
140
1.8
1.9
2.5
2.7
3.0
3.3
2.5
2.5
2.5
2.5
2.5
2.5
0.3
0.3
0.3
0.3
0.3
0.3
8.0
8.0
50
50
50
50
50
50
65
40
90
−
−
1.836
1.938
2.550
2.754
3.060
3.366
Max
5.50
690
500
4.0
4.0
4.0
4.0
4.0
4.0
0.5
0.5
0.5
0.5
0.5
0.5
80
80
80
80
80
80
−
−
−
−
−
−
−
−
−
−
−
ppm/°C
%/°C
Unit
kHz
mA
mA
mA
mA
mA
ms
ms
ns
ns
ns
ns
ns
%
V
V