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本帖最后由 Heaven_1 于 2023-2-23 18:41 编辑
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FeaTures
: D: d. [( K* ?* sHigh Efficiency: Up to 96%
3 w' L, C' ?3 F1 f* `8 Q5A Output Current: _) u* L' @% q
4V to 20V V IN Range* U Q/ ]* }8 N9 m5 P- t
Integrated Power N-Channel MOSFETs: f' D, |0 @5 g2 c, z
(70mΩ Top and 35mΩ Bottom)8 T+ m, a, h2 M$ K# z
Adjustable Frequency 800kHz to 4MHz
% Q+ O6 Y. }; u$ s5 T8 Y8 KPolyPhase ® Operation (Up to 12 Phases)
1 ^/ {9 Q' ~/ [+ p' gOutput Tracking
9 ^3 b, m1 c' G9 J- u0.6V ±1% Reference Accuracy& R- Z) e. L' a; Z+ ^
Current Mode Operation for Excellent Line and Load+ o0 j7 A v( G& r) l9 q! C
Transient Response
3 @5 `* D2 E) a+ M S6 e! k. t/ ]6 B* uShutdownModeDrawsLessThan15μASupplyCurrent, f1 h4 M8 H5 _* L$ B
ZCC3605: 15V Absolute Maximum V IN
9 {' Q6 j7 g+ X% p$ [5 SZCC3605A: 22V Absolute Maximum V IN9 ]/ e' d' O2 n) Y
The ZCC3605AIs Pin Compatible with the7 i1 E$ W; B( j; f+ T1 q7 V7 K
ZCC3605
7 q0 v3 ~% k" B( E# HAvailable in 24-Pin (4mm 4mm) QFN Package3 X; ?1 v! i0 f' h# \8 K$ t
applicaTions4 t0 e; F/ w5 F; p9 c H
Point of Load Power Supply
" d- J8 _) c7 R$ t7 l( J$ qPortable Instruments3 a. @, Q( M+ a4 U( @
Distributed Power Systems' u1 l8 D$ \- O O$ I8 z
Battery-Powered Equipment/ K( U5 c' s) d }: w
20V, 5A Synchronous Step-Down Regulator, J Y) [! Y& E; Y( y4 N
DescripTion5 t K$ P; Q5 c. y$ q
The ZCC3605A is a high efficiency, monolithic4 K1 G) u0 b( p( S- ]
synchro- nous buck regulator using a phase lockable
# G$ |% e7 j& w; T. M* ^controlled on-time constant frequency, current mode' j1 B: ]% v% T# D. m* l' v
architecture. PolyPhase operation allows multiple
0 ^( P! w- C9 j8 h) L8 RZCC3605A regula- torstorunoutofphasewhileusing
( a) d& f0 Z7 S& w. N1 O" D: Q0 hminimal input and output capacitance. The operating3 d7 K" X9 p4 a. ], {' A o
supply voltage range isfrom 20V down to 4V, making it' i6 y6 a0 f# f: G3 g
suitable for dual, triple or quadruple lithium-ion
3 z4 N% V6 |; ^! N. cbattery inputs as well as point of load power supply5 P4 [" J, L5 z7 K* N
applicationsfroma12Vor5Vrail. X$ k# X) k6 g0 S8 x/ e
The operating frequency is programmable from 800kHz to
3 N% o! g( @' r# W$ x: }0 Z4MHzwithanexternalresistor.Thehighfrequencycapa-$ r" `* Y9 N8 B1 [9 B7 O( c
bilityallowstheuseofsmallsuRFacemountinductors.For2 J4 K# W# q4 K% o4 |% Y
switching noise sensitive applications, it can be externally
7 [! Q+ E; u* }# r- g. m& Osynchronized from 800kHz to 4MHz. The PHMODE pin& B2 t0 A& g& i( s5 U! C g, }* G
allowsusercontrolofthephaseoftheoutgoingclock8 u1 n/ }( Y" [$ C: G1 p
signal. The unique constant frequency/controlledon-time2 B+ ?( ?2 O# j! F2 [! x5 Z0 Y
architectureisidealforhighstep-downratioapplications
9 o# N: Y0 E2 Cthat are operating at high frequency while demanding6 { U* I; t) f L9 ]9 O4 ?
fast transient response. Twointernal phase-lock loops' B( n8 F8 Y2 U8 x! W1 t
synchronize the internal oscillator to the externalclock
% o7 P7 D1 O3 x; g$ O1 J; Sandalsoservostheregulatoron-timetolockontoeither: h& b, [' @) f0 X0 [, W
theinternalclockortheexternalclockifit’spresent.( S4 r- ]% J8 `& r8 [8 x* y( v% c
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/1 
发表于 2023-2-23 17:49
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