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PDF NX2158 Data sheet ( Hoja de datos )
| Número de pieza | NX2158 | |
| Descripción | PWM BOOST CONTROLLER | |
| Fabricantes | Microsemi | |
| Logotipo |  |
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NX2158
PWM BOOST CONTROLLER
PRODUCTION DATASHEET
Pb Free Product
DESCRIPTION
FEATURES
The NX2158 controller IC is a boost controller IC de- n Single Supply Voltage fom 3V to 5.5V
signed for step up DC to DC converter applications. The n Programmable Frequency up to 2MHz
NX2158 operates at programmable frequency from n Internal Digital Soft Start Function
200kHz to 2MHz and employs cycle by cycle current n Cycle by Cycle Current Limit by Sensing Rdson of
limiting by sensing the Rdson of NMOSFET.
NMOSFET
Other features of the device are: thermal shutdown, n Pb-free and RoHS compliant
adaptive deadband control, internal digital soft start, VCC
UVLO and Shutdown capability via the ENBUS pin.
APPLICATIONS
n USB 3.0 3.3V to 5V conversion
TYPICAL APPLICATION
VIN 3.3V
2.2uH
22uF,X5R
VOUT 5V
10
1uF
PGOOD
EN
10k
2*22uF
1uF
VCC LDrv
14k
SW HDrv PGND BST
68p
FB
PGOOD ENBUS RT AGND OCP COMP
22k 10k
15pF
308k
59k
20k 1nF
Figure1 - Typical application of NX2158
Device
NX2158CMTR
ORDERING INFORMATION
Temperature Package
Frequency
0 to 70o C 3X3 MLPQ-16L 200kHz to 2MHz
Pb-Free
Yes
Package Marking : NX2158XXX XXX is date code. For example, 935 means that this NX2158 is
packaged in the 35th week of 2009
Rev.1.2
12/30/09
Microsemi
Analog Mixed Signal Group
11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: 714-893-2570
1
1 page  
BLOCK DIAGRAM
NX2158
ENBUS
VCC
FB
0.9*0.8V
SS_finished
RT
FB
COMP
GND
Bias
Generator
1.25V 1.2V
0.8V
UVLO
COMP
0.3V
START 0.8V
Digital
start Up
OSC
ramp
POR
START
OC
OVP
Latch
PWM
Driver
Logic
SQ
R
Thermal
Shutdown
VCC
START
0.6V
CLAMP
1.3V
CLAMP
LDRV
START
VCC
PGOOD
BST
HDRV
LDRV
SW
OCP
Figure 2 - Simplified block diagram of the NX2158
Rev.1.2
12/30/09
Microsemi
Analog Mixed Signal Group
11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: 714-893-2570
5
5 Page | ||
| Páginas | Total 5 Páginas | |
| PDF Descargar | [ Datasheet NX2158.PDF ] | |
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