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FeaTures
8 B+ h/ C5 E% a. {High Efficiency: Up to 96%
% e) F' k( @; C5A Output Current: `% } o$ M. }" x' s+ t; ~
4V to 20V V IN Range8 o6 Y" N* f) @6 K- ^" W
Integrated Power N-Channel MOSFETs! T+ ]& Z' k6 Z* j# b" x
(70mΩ Top and 35mΩ Bottom)# S. c! y9 X& Q% ]+ G
Adjustable Frequency 800kHz to 4MHz
% ~$ t7 V3 m0 l$ u/ ?* Y& J yPolyPhase ® Operation (Up to 12 Phases)
( V) L' T& [7 \; m3 }) n/ u- K3 B, R) AOutput Tracking/ f) k& W [7 V
0.6V ±1% Reference Accuracy
. ~' D0 F' B+ X. ^' Z8 ?- ]Current Mode Operation for Excellent Line and Load
& T$ @; Z/ J6 G7 v, o: R% o( STransient Response* D9 v4 B9 A; Z- N6 ?
ShutdownModeDrawsLessThan15μASupplyCurrent- z$ _+ u% v( `
ZCC3605: 15V Absolute Maximum V IN6 v7 l2 } T1 }: ~0 [
ZCC3605A: 22V Absolute Maximum V IN. A4 q, e* y/ D' A l$ C
The ZCC3605AIs Pin Compatible with the! t3 J% Y) ?' H3 n N- k& J
ZCC36052 t6 k2 @. y7 b$ m+ `
Available in 24-Pin (4mm 4mm) QFN Package
9 }" F. Z6 w2 J4 W3 RapplicaTions
) Z4 }" A- }# N/ W9 [4 B9 HPoint of Load Power Supply" ^+ ?% m# R: @$ a* Z8 [
Portable Instruments. T9 Q5 J. k! D& U+ b
Distributed Power Systems
5 H9 w, s0 b8 Q& P% Q* B5 qBattery-Powered Equipment6 e) t/ C/ l! l k2 |! P: ]' l
20V, 5A Synchronous Step-Down Regulator: U* L5 `/ U. b! H- ]1 h
DescripTion9 p) ?5 n) X2 B2 }3 ?$ E+ T
The ZCC3605A is a high efficiency, monolithic
) P4 u% y" p! u, n" m7 f0 `synchro- nous buck regulator using a phase lockable# n& H( S6 t5 t% ]& m4 A4 Y9 p4 y
controlled on-time constant frequency, current mode
3 Q# C3 t( q3 o$ Marchitecture. PolyPhase operation allows multiple
& K: D# Q/ z5 ^- V. Y& mZCC3605A regula- torstorunoutofphasewhileusing
* F$ ]9 i5 {; A+ Q) Zminimal input and output capacitance. The operating
* K5 g! O+ Z, |: ?/ ^4 Hsupply voltage range isfrom 20V down to 4V, making it4 A( a7 @! D& {0 j8 j
suitable for dual, triple or quadruple lithium-ion; j4 v0 {% j% u+ U- v+ R% ~
battery inputs as well as point of load power supply% y: `& O! {9 _" {) {0 S; E L
applicationsfroma12Vor5Vrail.5 H! @9 b0 m6 s2 d1 i$ T {
The operating frequency is programmable from 800kHz to$ A5 d; Y6 t& d$ N, c; ]
4MHzwithanexternalresistor.Thehighfrequencycapa- ]. O0 f: D: E8 y% @2 a' L
bilityallowstheuseofsmallsuRFacemountinductors.For; t" k( a* U4 I4 P/ d
switching noise sensitive applications, it can be externally" Q: @( d) _) V: }% y+ X9 a$ d
synchronized from 800kHz to 4MHz. The PHMODE pin
9 d1 ~# i3 z- J# }8 vallowsusercontrolofthephaseoftheoutgoingclock$ D7 a. `6 }' M- _! C
signal. The unique constant frequency/controlledon-time( q- P7 N/ b+ b. }- w7 \
architectureisidealforhighstep-downratioapplications
! p# [ j0 }2 E$ H; xthat are operating at high frequency while demanding
: I2 ?2 x( m) @ d- T# ~& dfast transient response. Twointernal phase-lock loops
, T0 q% P1 A; [3 f- j8 Qsynchronize the internal oscillator to the externalclock
D; l9 G7 ?7 H0 t3 s1 Oandalsoservostheregulatoron-timetolockontoeither
2 {* | z! n. ]theinternalclockortheexternalclockifit’spresent.
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发表于 2023-3-3 18:23
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