參數(shù)資料
型號(hào): LTC3526LEDC#PBF
廠商: LINEAR TECHNOLOGY CORP
元件分類: 穩(wěn)壓器
英文描述: 0.55 A SWITCHING CONTROLLER, 1250 kHz SWITCHING FREQ-MAX, PDSO6
封裝: 2 X 2 MM, 0.75 MM HEIGHT, LEAD FREE, PLASTIC, MO-229WCCD-2, DFN-6
文件頁(yè)數(shù): 14/16頁(yè)
文件大?。?/td> 339K
代理商: LTC3526LEDC#PBF
LTC3526L/LTC3526LB
3526lfc
3
+
+
GATE DRIVERS
AND
ANTI-CROSS
CONDUCTION
LOGIC
CLK
IPK
COMP
SLOPE
COMP
IZERO
COMP
ERROR AMP
SLEEP COMP
IZERO
WAKE
EXPOSED
PAD
+
WELL
SWITCH
MODE
CONTROL
UVLO
VREF
4M
SHDN
VBEST
START-UP
1MHz
OSC
TSD
THERMAL
SHUTDOWN
ANTI-RING
VSEL
VIN
1
6
SW
VOUT
L1
4.7H
VB
SHUTDOWN
CLAMP
CSS
VREF
VOUT
5
7
GND
3526l BD
2
FB
R2
COUT
4.7F
VOUT
1.5V
TO 5.25V
R1
4
CIN
2.2F
VIN
0.8V
TO 5V
block DiAgrAM
(Refer to Block Diagram)
operAtion
TheLTC3526L/LTC3526LBare1MHzsynchronousboost
convertershousedina6-lead2mm
×2mmDFNpackage.
Withaguaranteedabilitytostartupandoperatefrominputs
lessthan0.8V,thisdevicefeaturesfixedfrequency,current
modePWMcontrolforexceptionallineandloadregula-
tion.Thecurrentmodearchitecturewithadaptiveslope
compensationprovidesexcellenttransientloadresponse,
requiringminimaloutputfiltering.Internalsoft-startand
internalloopcompensationsimplifiesthedesignprocess
whileminimizingthenumberofexternalcomponents.
WithitslowRDS(ON)andlowgatechargeinternalN-chan-
nelMOSFETswitchandP-channelMOSFETsynchronous
rectifier,theLTC3526Lachieveshighefficiencyoverawide
rangeofloadcurrents.BurstModeoperationmaintains
highefficiencyatverylightloads,reducingthequiescent
currenttojust9A.Operationcanbebestunderstoodby
referringtotheBlockDiagram.
LOW VOLTAGE START-UP
TheLTC3526L/LTC3526LBincludeanindependentstart-
uposcillatordesignedtostartupataninputvoltageof
0.68V(typical).Soft-startandinrushcurrentlimitingare
providedduringstart-up,aswellasnormalmode.
When either VIN or VOUT exceeds 1.3V typical, the IC
entersnormaloperatingmode.Whentheoutputvoltage
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