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NX9415CMTR

P1-P3P4-P6P7-P9P10-P12P13-P15P16-P17
November 2013 Rev. 1.3 www.microsemi.com 1
© 2013 Microsemi Corporation
5A Constant Frequency Hysteretic
Synchronous Regulator
D1 VIN
BST
S1
SW
OCP
D2
FB
COMP
RT
VCC
5VREG
S2GND
NX9415
0.1µF
0.56µH
220pf
V
IN
+12V
768
2*(10µF/16V/X5R)
5k
15.8k
22µF/6.3V/X5R
0.1µF
V
OUT1
+5V,5A
3.01k
330pf
15k
4.7µF
1µF
10
4.22k
10pf
Figure 1 · Typical Application of NX9415
Features
Single Supply Voltage From 8V to 22V
Internal 5V Regulator
Programmable Frequency Up to 2.2MHz
Internal Digital Soft Start Function
Internal Boost Schottky Diode
Prebias Startup
Less than 50 nS Adaptive Deadband
Current Limit Triggers Hiccup by Sensing
R
DSON
of Synchronous MOSFET
Pb-free and RoHS Compliant
Applications
Low Profile On board DC to DC Application
LCD TV
Hard Disk Drive
ADSL Modem
Description
The NX9415 is synchronous buck switching
converter in a multi chip module designed for step-
down DC to DC converter applications.
It is
optimized to convert bus voltages from 8V to 22V to
as low as 0.8V output voltage. The output current
can be up to 5A. An internal regulator converts bus
voltage to 5V, which provides a voltage supply to the
internal logic and driver circuits. The NX9415
operates from 200 kHz to 2.2MHz and employs loss-
less current limiting by sensing the R
DSON
of
synchronous MOSFET followed by hiccup feature.
Feedback under voltage protection triggers hiccup.
Other features of the device are: internal Schottky
diode, thermal shutdown, 5V gate drive, adaptive
deadband control, internal digital soft start, 5VREG
under-voltage lock out and shutdown capability via
the comp pin. NX9415 is available in 4x4 MCM
package.
NX9415
5A Constant Frequency Hysteretic Synchronous Regulator
2
Pin Configuration and Pinout
1
2
5
8
17
3
16
15
14
4
9
6
7
10
11
12
13
18
19
20
22
21
23
24
PAD1
PAD2
PAD3
S1
S2
S2
D1
S1
S2
D2
D1
D2
S1
D1
D2
NC
NC
FB
COMP
GND
RT
VIN
NC
5VREG
VCC
OCP
BST
24-LEAD PLASTIC MCM 4x4
Figure 2 · Pinout
Ordering Information
Ambient
Temperature
Type Package Part Number Packaging Type
0°C to 70°C
RoHS Compliant
Pb-free
4X4 MCM-24L
NX9415CM Bulk / Tube
NX9415CMTR Tape and Reel
Pin Description
3
Pin Description
Pin Number Pin Designator
Description
1, 23-24
S2
Source of low side MOSFET and needs to be connected to power
ground.
2-3,22, PAD2 D2 Drain of low side MOSFET.
4, 12, 15, PAD3 NC Not used pin. Connecting these pins to ground is recommended.
5 VCC Voltage supply for internal analog circuit and driver
6 5VREG
An internal 5V regulator. A high frequency 4.7µF/X5R ceramic capacitor
must be connected from this pin to the GND pin as close as possible.
7 VIN Voltage supply for the internal 5V regulator.
8 RT
Oscillator's frequency can be set by using an external resistor from this
pin to GND.
9 GND Ground.
10 COMP
voltage control feedback loop. This pin is also used as a shut down pin.
When this pin is pulled below 0.3V, both drivers are turned off and
internal soft start is reset.
11 FB
This pin is the error amplifier inverting input. This pin is connected via
resistor divider to the output of the switching regulator to set the output
DC voltage.
13 BST
This pin supplies voltage to the high side driver. A high frequency
ceramic capacitor of 0.1 to 1µF must be connected from this pin to SW
pin.
14 OCP
of the over current protection (OCP) comparator. A fixed internal current
flows to the external resistor which sets the OCP voltage across the
R
DSON
of the low side MOSFET. Current limit point is this voltage divided
16, 21-20, PAD1 D1 Drain of high side MOSFET
17-19 S1
Source of high side MOSFET and provides return path for the high side
driver.
P1-P3P4-P6P7-P9P10-P12P13-P15P16-P17

NX9415CMTR

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Manufacturer:
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Description:
Switching Voltage Regulators Switching Regulator
Lifecycle:
New from this manufacturer.
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