NX2114 반도체 회로 부품 판매점
300kHz & 600kHz SYNCHRONOUS PWM CONTROLLER
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 Microsemi |
Evaluation board available.
NX2114/2114A
300kHz & 600kHz SYNCHRONOUS PWM CONTROLLER
PRELIMINARY DATA SHEET
Pb Free Product
DESCRIPTION
FEATURES
The NX2114 controller IC is a synchronous Buck con- n Synchronous Controller in 8 Pin Package
troller IC designed for step down DC to DC converter n Bus voltage operation from 2V to 25V
applications. Synchronous control operation replaces n Single 5V Supply Operation
the traditional catch diode with an Nch MOSFET result- n Short protection with feedback UVLO
ing in improved converter efficiency.Although the NX2114 n Internal 300kHz for 2114 and 600kHz for 2114A
controller is optimized to convert single 5V bus voltages n Internal Digital Soft Start Function
to supplies as low as 0.8V output voltage, however us- n Shut Down via pulling comp pin low
ing a few external components it can also be used for n Pb-free and RoHS compliant
other input supplies such as 12V input (See NX2113
data sheet for more optimized solution). The NX2114
operates at 300kHz while 2114A is set at 600kHz n
operation which together with less than 50 nS of dead n
band provides an efficient and cost effective solution. n
Other features of the device are:
Internal digital soft start; Vcc undervoltage lock out; Out- n
put undervoltage protection with digital filter and shut- n
down capability via the enable pin.
APPLICATIONS
Graphic Card on board converters
Memory Vddq Supply in mother board applications
On board DC to DC such as
5V to 3.3V, 2.5V or 1.8V
Hard Disk Drive
Set Top Box
TYPICAL APPLICATION
L2 1uH
Vin
+5V C4
47uF,70mohm
R5
10 D1 MBR0530T1
OFF R6 10k
ON
R7
10k
C8
47uF,70mohm
2N3904
C1
47pF
C6
1uF
5
Vcc
7 Comp
C2
1.5nF
R4
22.1k
6
Fb
1
BST
Hdrv 2
SW 8
Ldrv 4
C7
0.1uF
Gnd
3
C5
1uF
M1
L1 1.5uH
M2
Cin
220uF,12mohm
Vout
+1.6V,6A
Co
2 x (220uF,15mohm)
R2
10.2k
R1 10.2k
R3 C3
1.5k 2.2nF
Device
NX2114CSTR
NX2114ACSTR
Figure1 - Typical application of 2114
ORDERING INFORMATION
Temperature
0 to 70oC
0 to 70o C
Package
SOIC-8L
SOIC-8L
Frequency
300kHz
600kHz
Pb-Free
Yes
Yes
Rev. 4.0
06/20/06
1
NX2114/2114A
ABSOLUTE MAXIMUM RATINGS(NOTE1)
Vcc to GND & BST to SW voltage ................... 6.5V
BST to GND Voltage ...................................... 35V
Storage Temperature Range ............................. -65oC to 150oC
Operating Junction Temperature Range ............. -40oC to 125oC
NOTE1: Stresses above those listed in "ABSOLUTE MAXIMUM RATINGS", may cause permanent
damage to the device. This is a stress only rating and operation of the device at these or any other
conditions above those indicated in the operational sections of this specification is not implied.
PACKAGE INFORMATION
8-PIN PLASTIC SOIC (S)
θJA ≈ 130o C/W
BST 1
HDrv 2
Gnd 3
LDrv 4
8 SW
7 Comp
6 Fb
5 Vcc
ELECTRICAL SPECIFICATIONS
Unless otherwise specified, these specifications apply over Vcc = 5V, and T = 0 to 70oC. Typical values refer to T
AA
= 25oC. Low duty cycle pulse testing is used which keeps junction and case temperatures equal to the ambient
temperature.
PARAMETER
Reference Voltage
Ref Voltage
Ref Voltage line regulation
Supply Voltage(Vcc)
VCC Voltage Range
VCC Supply Current (Static)
VCC Supply Current
(Dynamic)
Supply Voltage(VBST)
VBST Supply Current (Static)
VBST Supply Current
(Dynamic)
Under Voltage Lockout
VCC-Threshold
VCC-Hysteresis
SYM
Test Condition
VREF 4.5V<Vcc<5.5V
Min
VCC
ICC (Static)
ICC
(Dynamic)
Outputs not switching
CLOAD=3300pF FS=300kHz
4.5
IBST (Static) Outputs not switching
IBST CLOAD=3300pF FS=300kHz
(Dynamic)
VCC_UVLO VCC Rising
VCC_Hyst VCC Falling
TYP MAX Units
0.8 V
0.1 %
5 5.5 V
2.1 mA
5 mA
0.15 mA
5 mA
4.2 V
0.22 V
Rev. 4.0
06/20/06
2
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NX2114 controller
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관련 데이터시트
NX2114
300kHz & 600kHz SYNCHRONOUS PWM CONTROLLER - Microsemi
NX2114A
300kHz & 600kHz SYNCHRONOUS PWM CONTROLLER - Microsemi