ncp1582a ON Semiconductor, ncp1582a Datasheet - Page 3

• Manufacturer Part Number: ncp1582a
• Description: Low Voltage Synchronous Buck Controllers
• Manufacturer: ON Semiconductor

Stresses exceeding Maximum Ratings may damage the device. Maximum Ratings are stress ratings only. Functional operation above the
Recommended Operating Conditions is not implied. Extended exposure to stresses above the Recommended Operating Conditions may affect
device reliability.
1. 60−180 seconds minimum above 237°C.
PIN FUNCTION DESCRIPTION
Pin No.
ABSOLUTE MAXIMUM RATINGS
MAXIMUM RATINGS
Main Supply Voltage Input
Bootstrap Supply Voltage Input
Switching Node (Bootstrap Supply Return)
High−Side Driver Output (Top Gate)
Low−Side Driver Output (Bottom Gate)
Feedback
COMP/DISABLE
Thermal Resistance, Junction−to−Ambient
Thermal Resistance, Junction−to−Case
Operating Junction Temperature Range
Operating Ambient Temperature Range
Storage Temperature Range
Lead Temperature Soldering (10 sec): Reflow (SMD styles only)
(Note 1)
Moisture Sensitivity Level
1
2
3
4
5
6
7
8
COMP/DIS
Symbol
PHASE
GND
BST
V
BG
TG
FB
CC
Supply rail for the floating top gate driver. To form a boost circuit, use an external diode to bring the
desired input voltage to this pin (cathode connected to BST pin). Connect a capacitor (C
and the PHASE pin. Typical values for C
Top gate MOSFET driver pin. Connect this pin to the gate of the top N−Channel MOSFET.
IC ground reference. All control circuits are referenced to this pin.
Bottom gate MOSFET driver pin. Connect this pin to the gate of the bottom N−Channel MOSFET.
Supply rail for the internal circuitry. Operating supply range is 4.5 V to 15 V. Decouple with a 1 mF
capacitor to GND. Ensure that this decoupling capacitor is placed near the IC.
This pin is the inverting input to the error amplifier. Use this pin in conjunction with the COMP pin to
compensate the voltage−control feedback loop. Connect this pin to the output resistor divider (if used) or
directly to Vout.
Compensation Pin. This is the output of the error amplifier (EA) and the non−inverting input of the PWM
comparator. Use this pin in conjunction with the FB pin to compensate the voltage−control feedback loop. The
compensation capacitor also acts as a soft−start capacitor. Pull this pin low with an open drain transistor for
disable.
Switch node pin. This is the reference for the floating top gate driver. Connect this pin to the source of the top
MOSFET.
Pin Name
Rating
NCP1582, NCP1582A, NCP1583
http://onsemi.com
BST
3
range from 0.1 mF to 1 mF. Ensure that C
Pb−Free
Description
COMP/DIS
Symbol
Symbol
PHASE
R
R
MSL
BST
V
T
BG
TG
FB
T
T
qJC
qJA
stg
CC
A
J
15 V wrt/PHASE
15 V wrt/PHASE
30 V wrt/GND
30 V wrt/GND
−55 to +150
−40 to 150
−40 to 85
260 peak
Value
V
5.5 V
5.5 V
15 V
24 V
15 V
165
MAX
45
1
BST
BST
is placed near the IC.
) between this pin
−2 V for < 200 ns
−5 V for < 50 ns
wrt/PHASE
−0.3 V
−0.3 V
−0.7 V
−0.3 V
−0.3 V
−0.3 V
−0.3 V
°C/W
°C/W
V
Unit
°C
°C
°C
°C
MIN
−