NCP1550D ON, NCP1550D Datasheet - Page 2

• Manufacturer Part Number: NCP1550D
• Description: 600 kHz PWM/PFM Step-Down DC-DC Controller
• Manufacturer: ON

Maximum ratings are those values beyond which device damage can occur. Maximum ratings applied to the device are individual stress limit
values (not normal operating conditions) and are not valid simultaneously. If these limits are exceeded, device functional operation is not implied,
damage may occur and reliability may be affected.
NOTE:
1. This device series contains ESD protection and exceeds the following tests:
2. Latchup Current Maximum Rating: 150 mA per JEDEC standard: JESD78.
3. Moisture Sensitivity Level (MSL): 1 per IPC/JEDEC standard: J−STD−020A.
PIN FUNCTION DESCRIPTIONS
MAXIMUM RATINGS
Pin
Device Power Supply, V
Input/Output Pins
Thermal Characteristics
Operating Junction Temperature Range
Operating Ambient Temperature Range
Storage Temperature Range
1
2
3
4
5
CE (Pin 1)
V
EXT (Pin 4)
TSOP−5 Plastic Package, Case 483−01
Thermal Resistance, Junction−to−Air
OUT
Machine Model (MM) $200V per JEDEC standard: JESD22−A115.
Human Body Model (HBM) $2.0 kV per JEDEC standard: JESD22−A114.
Symbol
(Pin 3)
ESD data available upon request.
V
GND
EXT
CE
V
OUT
IN
V
GND
OUT
Chip Enable pin, active high (internal pullup current source). By connecting this pin to GND, the switching operation
of the controller will be stopped.
Ground Connection
Output voltage monitoring input. This pin must be connected to the regulated output node as a feedback to on−chip
control circuitry. V
Gate drive for external P−MOSFET
Power supply input
(T
IN
3
2
A
(Pin 5)
= 25 C unless otherwise noted)
M1
OUT
Rating
is internally connected to the on−chip voltage divider that determines the output voltage level.
Figure 1. Simplified Block Diagram
A1
+
−
Voltage Reference
and Soft−Start
http://onsemi.com
T
Controller
T
ON(PFM)
NCP1550
PWM
ON
t
2
Description
Oscillator
600 kHz
CP1
2.2 V + −
+
−
Symbol
Driver
V
V
R
V
T
UVLO
V
OUT
T
T
EXT
qJA
stg
CE
IN
A
J
−40 to +150
−55 to +150
−0.3 to 6.0
−0.3 to 6.0
−0.3 to 6.0
−0.3 to 6.0
−40 to +85
5
4
1
Value
250
V
EXT
CE
IN
Unit
C/W
V
V
C
C
C