NCP1587 ONSEMI [ON Semiconductor], NCP1587 Datasheet - Page 3

• Manufacturer Part Number: NCP1587
• Description: Low Voltage Synchronous Buck Controller
• Manufacturer: ONSEMI [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.
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
NCP1587A Operating Junction Temperature Range
NCP1587A Operating Ambient Temperature Range
Storage Temperature Range
Lead Temperature Soldering (10 sec): Reflow (SMD styles only) Pb−Free
Moisture Sensitivity Level
1
2
3
4
5
6
7
8
COMP/DIS
Symbol
PHASE
GND
BST
V
TG
BG
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 13.2 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 dir-
ectly to V
Compensation Pin. This is the output of the error amplifier (EA) and the non−inverting input of the PWM com-
parator. Use this pin in conjunction with the FB pin to compensate the voltage−control feedback loop. The com-
pensation capacitor also acts as a soft−start capacitor. Pull this pin low 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
out
Rating
.
http://onsemi.com
BST
COMP/DIS
3
Symbol
PHASE
V
BST
range from 0.1 mF to 1 mF. Ensure that C
TG
BG
FB
CC
Description
40 V < 50 ns wrt/PGND
Symbol
15 V wrt/PHASE
35 V wrt/PGND
R
R
MSL
30 V wrt/GND
T
15 V wrt/SW
40 V < 50 ns
T
T
qJA
qJC
stg
A
J
V
5.5 V
5.5 V
15 V
35 V
15 V
MAX
−55 to +150
0 to 125
0 to 70
Value
165
260
45
−2 V < 200 ns wrt/PHASE
BST
3
BST
−5.0 V for < 200 ns
−10 V for < 200 ns
−0.3 V wrt/PHASE
is placed near the IC.
) between this pin
−0.3 V
−0.3 V
−0.3 V
−0.3 V
−5.0 V
−0.3 V
−0.3 V
−0.3 V
V
MIN
°C/W
°C/W
Unit
°C
°C
°C
°C
−