ncp1589l ON Semiconductor, ncp1589l Datasheet - Page 3

• Manufacturer Part Number: ncp1589l
• Description: Ncp1589l Low Voltage Synchronous Buck Controller With Light Load Efficiency And Transient Enhancement
• 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.
PIN FUNCTION DESCRIPTION
Pin No.
ABSOLUTE MAXIMUM RATINGS
MAXIMUM RATINGS
Thermal Resistance, Junction−to−Ambient
Thermal Resistance, Junction−to−Case
Operating Junction Temperature Range
Operating Ambient Temperature Range
Storage Temperature Range
Moisture Sensitivity Level
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, VORPM
COMP/EN
PGOOD
10
1
2
3
4
5
6
7
8
9
COMP/EN
PGOOD
Symbol
VORPM
BOOT
GND
VCC
UG
LG
LX
FB
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 BOOT pin). Connect a capacitor (C
the LX pin. Typical values for C
Switch node pin. This is the reference for the floating top gate driver. Connect this pin to the source of the top
MOSFET. Also used for low side MOSFET R
Top gate MOSFET driver pin. Connect this pin to the gate of the top N−channel MOSFET.
Bottom gate MOSFET driver pin. Connect this pin to the gate of the bottom N−channel MOSFET. Also used to
set the overcurrent limit.
IC ground reference. All control circuits are referenced to this pin. Connect to FLAG.
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. Also low−side MOSFET drive voltage.
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. Pull this
pin low for disable.
This pin is the inverting input to the error amplifier. Use this pin in conjunction with the COMP pin to com-
pensate the voltage−control feedback loop. Connect this pin to the output resistor divider (if used) or directly
to V
Output voltage information for RPM threshold
Power Good output. Pulled Low if VOS is outside ±10% of 0.8 V V
Pin Name
out
Rating
.
BOOT
http://onsemi.com
range from 0.1 mF to 1 mF. Ensure that C
3
DS(on)
FB, VORPM
COMP/EN
Description
PGOOD
Symbol
Symbol
BOOT
current detection and diode emulation.
VCC
R
R
MSL
T
UG
LG
LX
T
T
qJC
qJA
stg
A
J
ref
40 V for < 100 ns
40 V for < 100 ns
.
35 V wrt/GND
40 V < 100 ns
30 V wrt/GND
−55 to +150
15 V wrt/LX
15 V wrt/LX
0 to 150
0 to 95
Value
V
6.0 V
5.5 V
15 V
35 V
15 V
TBD
165
7 V
MAX
45
BOOT
BOOT
is placed near the IC.
) between this pin and
−10 V for < 200 ns
−5 V for < 200 ns
−5 V for < 200 ns
−0.3 V wrt/LX
−0.3 V
−0.3 V
−0.3 V
−0.3 V
−0.3 V
−0.3 V
−0.3 V
−0.3 V
°C/W
°C/W
V
−5 V
Unit
°C
°C
°C
MIN
−