NX9415CMTR Microsemi Analog Mixed Signal Group, NX9415CMTR Datasheet

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NX9415CMTR

Manufacturer Part Number
NX9415CMTR
Description
IC BUCK SYNC ADJ 5A MCM-24L
Manufacturer
Microsemi Analog Mixed Signal Group
Type
Step-Down (Buck)r
Datasheet

Specifications of NX9415CMTR

Internal Switch(s)
Yes
Synchronous Rectifier
Yes
Number Of Outputs
1
Voltage - Output
Adj to 0.8V
Current - Output
5A
Frequency - Switching
200kHz ~ 2.2MHz
Voltage - Input
9 ~ 22 V
Operating Temperature
0°C ~ 70°C
Mounting Type
Surface Mount
Package / Case
24-VQFN Exposed Pad, 24-HVQFN, 24-SQFN, 24-DHVQFN
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Power - Output
-
Rev.1.2
12/28/09
The NX9415 is synchronous buck switching converter in
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 volt-
age. The output current can be up to 5A. An internal
regulator converts bus voltage to 5V, which provides volt-
age supply to internal logic and driver circuit. The NX9415
operates from 200kHz to 2.2MHz and employs loss-less
current limiting by sensing the Rdson of synchronous
MOSFET followed by hiccup feature.Feedback under volt-
age protection triggers hiccup.
Other features of the device are: internal schottky diode,
thermal shutdown, 5V gate drive, adaptive deadband con-
trol, internal digital soft start, 5VREG undervoltage lock
out and shutdown capability via the comp pin. NX9415
is available in 4x4 MCM package.
+12V
NX9415CMTR
2*(10uF/16V/X5R)
Vin
4.7uF
Device
1uF
4.22k
5A SYNCHRONOUS BUCK SWITCHING REGULATOR
10
RT
VCC
D1
5VREG
Temperature
DESCRIPTION
0 to 70
GND
VIN
Figure 1 - Typical application of 9415
o
C
S2
COMP
0.1uF
OCP
BST
SW
D2
S1
FB
4X4 MCM-24L
Package
5k
330p
n
n
n Programmable frequency up to 2.2MHz
n Internal Digital Soft Start Function
n Internal boost schottky diode
n Prebias Startup
n Less than 50 nS adaptive deadband
n
n Pb-free and RoHS compliant
n
n
n
n
15k
0.1uF
Single supply voltage from 8V to 22V
Internal 5V regulator
Current limit triggers hiccup by sensing Rdson of
Synchronous MOSFET
Low Profile On board DC to DC Application
LCD TV
Hard Disk Drive
ADSL Modem
10p
220p
0.56uH
ORDERING INFORMATION
768
200kHz to 2.2MHz
TYPICAL APPLICATION
3.01k
Frequency
15.8k
PRODUCTION DATA SHEET
APPLICATIONS
22uF/6.3V/X5R
Pb Free Product
Pb-Free
FEATURES
Vout1
+5V,5A
Yes
NX9415
1

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NX9415CMTR Summary of contents

Page 1

... VCC 1uF 4.22k RT GND Device Temperature NX9415CMTR Rev.1.2 12/28/09 n Single supply voltage from 8V to 22V n Internal 5V regulator n Programmable frequency up to 2.2MHz n Internal Digital Soft Start Function n Internal boost schottky diode n Prebias Startup n Less than 50 nS adaptive deadband ...

Page 2

ABSOLUTE MAXIMUM RATINGS 5VREG,VCC to GND & BST to SW voltage ........ -0.3V to 6.5V VIN to GND Voltage ......................................... 25V S1 to GND ...................................................... -2V to 30V D1 to S1, ............................................ 30V All other pins ................................................... -0.3V ...

Page 3

ELECTRICAL SPECIFICATIONS Unless otherwise specified, these specifications apply over Vin = 12V, and T capacitors:C =1uF, C =4.7uF, all X5R ceramic capacitors. Typical values refer to T VIN 5VREG pulse testing is used which keeps junction and case temperatures equal ...

Page 4

PIN DESCRIPTIONS PIN # PIN SYMBOL Source of high side MOSFET and provides return path for the high side driver. 17-19 S1 Drain of low side MOSFET. 2-3,22,PAD2 D2 Source of low side MOSFET and needs to be connected to ...

Page 5

BLOCK DIAGRAM 5VREG 5V VIN Regulator VCC 1.25V Bias Generator 0.8V COMP 0.3V RT START 0.8V OSC Digital ramp start Up FB 0.6V CLAMP COMP START GND Figure 2 - Simplified block diagram of the NX9415 Rev.1.2 12/28/09 UVLO POR ...

Page 6

TYPICAL APPLICATION Input Voltage=12V Output Voltage=5V@5A Working Frequency=2.2MHz U1 Vin D1 +12V CIN 2*(10uF/16V/X5R) 5VREG C4 4.7uF R1 10 VCC C1 1uF R2 4.22k RT Figure 3- Demo board schematic Rev.1.2 12/28/09 C2 0.1uF BST VIN C3 L1 0.1uF 0.56uH ...

Page 7

... Bill of Materials Item Quantity Reference C2, CIN 7 1 COUT Rev.1.2 12/28/09 Value Manufacturer 1u 0.1u 4.7u/6.3V/X5R 220p 330p 10u/16V/X5R 22u/6.3V/X5R DO1813P-561HC Coilcraft 10 4.22k 15k 768 15.8k 3.01k 5k NX9415CMTR NEXSEM INC. NX9415 7 ...

Page 8

Demoboard waveforms Figure 4 - Output ripple (CH1 SW 10V/DIV, CH2 VOUT AC 50mV/DIV, CH4 OUTPUT CURRENT 5A/DIV) Figure 6 - Over current protection(CH4 OUTPUT CURRENT 5A/DIV) Figure 8 - Output Efficiency @VOUT=5V,VIN=12V Rev.1.2 12/28/09 Figure 5 - Output voltage ...

Page 9

APPLICATION INFORMATION Symbol Used In Application Information Input voltage Output voltage OUT I - Output current OUT DV - Output voltage ripple RIPPLE F - Working frequency Inductor current ripple RIPPLE Output ...

Page 10

For the voltage amplifier, the transfer function of compensator OUT in To achieve the same effect as voltage amplifier, the compensator of transconductance amplifier must sat condi ...

Page 11

Vout Vref Figure 12 - Type II compensator with transconductance amplifier Output Voltage Calculation Output voltage is set by reference voltage and ex- ternal voltage divider. The reference voltage is fixed at 0.8V. The divider consists ...

Page 12

MCM 24 PIN PACKAGE OUTLINE DIMENSIONS NOTE: ALL DIMENSIONS ARE DISPLAYED IN MILLIMETERS. Rev.1.2 12/28/09 NX9415 12 ...

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