LM2852 Datasheet PDF - National Semiconductor
| Part Number | LM2852 | |
| Description | 2A 500/1500kHz Synchronous SIMPLE SWITCHER Buck Regulator | |
| Manufacturers | National Semiconductor | |
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October 2006
LM2852
2A 500/1500kHz Synchronous SIMPLE SWITCHER® Buck
Regulator
General Description
The LM2852 SIMPLE SWITCHER® synchronous buck regu-
lator is a high frequency step-down switching voltage regu-
lator capable of driving up to a 2A load with excellent line and
load regulation. The LM2852 can accept an input voltage
between 2.85V and 5.5V and deliver an output voltage that is
factory programmable from 0.8V to 3.3V in 100mV incre-
ments. The LM2852 is available with a choice of two switch-
ing frequencies - 500kHz (LM2852Y) or 1.5MHz (LM2852X).
It also features internal, type-three compensation to deliver a
low component count solution. The exposed-pad TSSOP-14
package enhances the thermal performance of the LM2852.
Features
n Input voltage range of 2.85 to 5.5V
n Factory EEPROM set output voltages from 0.8V to 3.3V
in 100mV increments
n Maximum load current of 2A
n Voltage Mode Control
n Internal type-three compensation
n Switching frequency of 500kHz or 1.5MHz
n Low standby current of 10µA
n Internal 60 mΩ MOSFET switches
n Standard voltage options 0.8/1.0/1.2/1.5/1.8/2.5/3.3 volts
Applications
n Low voltage point of load regulation
n Local solution for FPGA/DSP/ASIC core power
n Broadband networking and communications
infrastructure
n Portable computing
Typical Application Circuit
20127001
SIMPLE SWITCHER®
SIMPLE SWITCHERreg; is a registered trademark of National Semiconductor Corporation
© 2006 National Semiconductor Corporation DS201270
20127002
www.national.com
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Electrical Characteristics AVIN = PVIN = 5V unless otherwise indicated under the Conditions column.
www.DLiamtaitSshienest4taUn.dcoamrd type are for TJ = 25˚C only; limits in boldface type apply over the junction temperature (TJ) range of -40˚C
to +125˚C. Minimum and Maximum limits are guaranteed through test, design, or statistical correlation. Typical values
represent the most likely parametric norm at TJ = 25˚C, and are provided for reference purposes only. (Continued)
Symbol
Parameter
Drange
Duty Cycle Range
ENABLE CONTROL4
VIH EN Pin Minimum
High Input
VIL EN Pin Maximum
Low Input
IEN EN Pin Pullup EN = 0V
Current
THERMAL CONTROLS
TSD TJ for Thermal
Shutdown
TSD-HYS
Hysteresis for
Thermal Shutdown
Conditions
Min Typ Max Units
0 100 %
75 % of
AVIN
25 % of
AVIN
1.2 µA
165 ˚C
10 ˚C
Note 1: Absolute maximum ratings indicate limits beyond which damage to the device may occur. Operating Range indicates conditions for which the device is
intended to be functional, but does not guarantee specfic performance limits. For guaranteed specifications and test conditions, see the Electrical Characteristics.
Note 2: Human body model: 1.5kΩ in series with 100pF. SW and PVIN pins are derated to 1.5kV
Note 3: VOUT measured in a non-switching, closed-loop configuration at the SNS pin.
Note 4: The enable pin is internally pulled up, so the LM2852 is automatically enabled unless an external enable voltage is applied.
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Part DetailsOn this page, you can learn information such as the schematic, equivalent, pinout, replacement, circuit, and manual for LM2852 electronic component. |
| Information | Total 14 Pages | |
| Link URL | [ Copy URL to Clipboard ] | |
| Download | [ LM2852.PDF Datasheet ] | |
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