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本帖最后由 Heaven_1 于 2023-2-23 18:41 编辑 * @. [ n+ X2 [. _2 k M }& K+ {
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FeaTures5 V( S& W+ t Z4 N; Q
High Efficiency: Up to 96%
3 l; R% X* b6 e! G5A Output Current
3 {) J- S/ X7 N) f4 a4 O+ z5 j0 _4V to 20V V IN Range
& F5 ]$ N1 ~- \8 C IIntegrated Power N-Channel MOSFETs
Y: N) F! L7 s f/ Z3 g) ^$ E6 z(70mΩ Top and 35mΩ Bottom). ~6 d6 t) U% N2 j1 a% z
Adjustable Frequency 800kHz to 4MHz! e$ a, I9 O, V# D: s) t4 d
PolyPhase ® Operation (Up to 12 Phases)
6 e/ t) j- q! l- D% r& H xOutput Tracking7 {& i% f: m) B. y# W: m
0.6V ±1% Reference Accuracy) Z# h( ^+ h! m1 s2 A9 m9 I- o% [
Current Mode Operation for Excellent Line and Load. T" h& C. s' M' Z/ Y3 _
Transient Response8 P1 M% C5 J% u6 Y/ l! }5 Z
ShutdownModeDrawsLessThan15μASupplyCurrent
5 J4 t* E$ r6 U7 |4 bZCC3605: 15V Absolute Maximum V IN
+ V; y. ?4 t1 M P' }0 B/ F; DZCC3605A: 22V Absolute Maximum V IN9 s' P" |* C Y: ~+ b: P: h+ f
The ZCC3605AIs Pin Compatible with the
, ?) R0 q( J( Z* cZCC36059 }% D7 q/ X* k9 v" {# |
Available in 24-Pin (4mm 4mm) QFN Package: d" N* ]3 T- G: b4 \
applicaTions6 r; ~6 o5 E F! M
Point of Load Power Supply
1 a0 M) `& c( _5 |( l7 r3 H# n* s. [Portable Instruments8 l" k0 w( Z) Q/ `
Distributed Power Systems
" n5 G- e, Y% |# N* Z) U$ SBattery-Powered Equipment
, b+ h" Z4 X+ r7 T- C* Z" ~6 Y# O* D20V, 5A Synchronous Step-Down Regulator
1 p. b1 r; \4 `. o5 ^DescripTion
; U$ t" f& a' yThe ZCC3605A is a high efficiency, monolithic! t! w9 k9 g% V; S* n0 ~6 y( D
synchro- nous buck regulator using a phase lockable
D+ z" }- N( Q& e# a( ~controlled on-time constant frequency, current mode$ t- g- q9 |$ V" X% |, A+ D
architecture. PolyPhase operation allows multiple
2 x: p0 y- c2 s, i8 TZCC3605A regula- torstorunoutofphasewhileusing
O, h n6 t8 [+ _1 c3 r- d2 bminimal input and output capacitance. The operating+ Z; P3 l" [ w& @' f* U
supply voltage range isfrom 20V down to 4V, making it
2 v" @. {& X: O1 Q: Usuitable for dual, triple or quadruple lithium-ion
% [/ A# t [" T3 Q5 u" Vbattery inputs as well as point of load power supply
; t2 o% g! y8 fapplicationsfroma12Vor5Vrail.
0 j9 g2 J" w! [2 }0 C# ~( iThe operating frequency is programmable from 800kHz to
6 m W# W& j, c4MHzwithanexternalresistor.Thehighfrequencycapa-7 w1 y- Z) J9 ]) u
bilityallowstheuseofsmallsuRFacemountinductors.For# T+ i' z9 A8 j3 e, n3 L+ U
switching noise sensitive applications, it can be externally1 P4 D4 z- R/ I. [. l9 L. A3 R0 O
synchronized from 800kHz to 4MHz. The PHMODE pin
8 Z; E m2 v& M: |: zallowsusercontrolofthephaseoftheoutgoingclock5 {# S7 s8 Q4 S' ]+ Y5 ?8 _
signal. The unique constant frequency/controlledon-time0 x b( g4 ^$ ^" ]
architectureisidealforhighstep-downratioapplications
: i( v9 }" B a z1 Sthat are operating at high frequency while demanding$ Y: p0 m, z; F; q7 D4 d) |" i
fast transient response. Twointernal phase-lock loops
% R B8 k: L8 N. U& k- nsynchronize the internal oscillator to the externalclock
- N. N, N: S- y7 \" Yandalsoservostheregulatoron-timetolockontoeither
$ D8 |! e& {2 t) k$ ^theinternalclockortheexternalclockifit’spresent., D) \5 y9 B5 C2 t+ H( P6 p4 }6 `; W7 P
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发表于 2023-2-23 17:49
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