NCP1500
PIN FUNCTION DESCRIPTIONS
Pin #
1
2
3
4
5
6
7
8
Symbol
SHD
SYN
V O
LX
V IN
GND
CB1
CB0
Pin Description
Device is placed in shutdown when SHD is driven low. In shutdown mode, the internal MOSFET and output
are turned off. Driven to high for normal operation. This pin is floating internally and needs to be tied to a
fixed source externally.
External Synchronization Clock Signal Input. If a clock signal is present at this pin, the device will go into
PWM mode. If SYN is driven low, the device operates in linear mode.
Connected to internal voltage divider for feedback.
Pin for the connection between the drain of the internal P ? MOSFET and the external inductor.
Voltage Supply Input. Bypass with 10 m F capacitor.
Ground.
Control Bit 1 Input for output voltage level selection. Internally pulled low.
Control Bit 0 Input for output voltage level selection. Internally pulled low.
ABSOLUTE MAXIMUM RATINGS
Power Supply (Pin 5)
Rating
Symbol
V IN
Value
? 0.3 to 6.0
Unit
V
Input/Output Pins
Pin 1 ? 4 & Pin 7 ? 8
V IO
? 0.3 to 6.0
V
Thermal Characteristics
Micro8 Plastic Package
Thermal Resistance Junction to Air
Operating Junction Temperature Range
Operating Ambient Temperature Range
Storage Temperature Range
R q JA
T J
T A
T stg
240
? 40 to +140
? 40 to +85
? 55 to +150
° C/W
° C
° C
° C
1. This device series contains ESD protection and exceeds the following tests:
Human Body Model (HBM) $ 2.0 kV per JEDEC standard: JESD22 ? A114.
Machine Model (MM) $ 200 V per JEDEC standard: JESD22 ? A115.
2. Latch ? up Current Maximum Rating: $ 150 mA per JEDEC standard: JESD78.
http://onsemi.com
2
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