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FeaTures
/ c. {% f) z' e& a a( r/ T+ f2 ^) X- U- ]High Efficiency: Up to 96%1 S& e2 K0 M9 _- _0 y- d
5A Output Current1 H, n: X" A7 o1 n$ l% x- N' ~
4V to 20V V IN Range5 D# Z E! Z. [
Integrated Power N-Channel MOSFETs
2 a8 n+ z; x; [. i# [ v(70mΩ Top and 35mΩ Bottom)0 h4 r5 |! h# H+ l
Adjustable Frequency 800kHz to 4MHz
% D- Y1 y" r0 y4 m; j0 WPolyPhase ® Operation (Up to 12 Phases)9 z8 d; t7 f |
Output Tracking: c) {+ a$ B1 T+ z/ ]7 w
0.6V ±1% Reference Accuracy
" P' T! P9 A% J3 `2 h8 |9 DCurrent Mode Operation for Excellent Line and Load0 u, v6 z( f% z+ x9 c7 [
Transient Response
0 N7 e2 y( y1 @/ CShutdownModeDrawsLessThan15μASupplyCurrent) a. L) j8 ~% i9 D: `2 a$ o
ZCC3605: 15V Absolute Maximum V IN+ E) [; M ]. ^5 G; Q
ZCC3605A: 22V Absolute Maximum V IN
0 I4 Z ]+ _, p% G; n$ ]# H+ jThe ZCC3605AIs Pin Compatible with the, {& K9 V3 {% m# T3 {: t9 w. _
ZCC3605
& v( o3 L! Z5 w( L( a: u- vAvailable in 24-Pin (4mm 4mm) QFN Package
' o! e3 ?; `0 UapplicaTions7 P) e, P* S% T) P# N+ X/ p
Point of Load Power Supply* u9 ?! ^! R( l, d) _; r B
Portable Instruments
8 F3 W4 k3 M& J9 x# p1 ADistributed Power Systems; t( k2 N, Z4 v6 ^ E
Battery-Powered Equipment+ R/ A7 Q" o5 n$ Z& W( e G( \
20V, 5A Synchronous Step-Down Regulator
6 } S4 D' i* D0 IDescripTion
7 N; A, \% O; Q: n$ W( R# eThe ZCC3605A is a high efficiency, monolithic" i3 W, ^4 P4 n/ I
synchro- nous buck regulator using a phase lockable% W5 Q" Z" d1 D* R0 `8 V" o
controlled on-time constant frequency, current mode
* b- @- F5 A6 T3 l# Larchitecture. PolyPhase operation allows multiple
, s$ V* g5 C6 P2 e PZCC3605A regula- torstorunoutofphasewhileusing
/ R- W+ Q* U* p \7 M! d4 [1 {minimal input and output capacitance. The operating+ Y4 x6 N2 i& E! D
supply voltage range isfrom 20V down to 4V, making it1 u- s* T# Z) B$ U: S
suitable for dual, triple or quadruple lithium-ion6 h3 ^8 c0 e0 ^4 f% P+ X# C) ?$ j
battery inputs as well as point of load power supply
( V$ {+ W3 W# h- L: X6 Happlicationsfroma12Vor5Vrail.% k' v$ B) i( g0 L, S, |+ B
The operating frequency is programmable from 800kHz to
# [: i' M& P7 |- G4MHzwithanexternalresistor.Thehighfrequencycapa-& U; B2 S9 d) l$ F
bilityallowstheuseofsmallsuRFacemountinductors.For
* E7 C: B2 c" z) Fswitching noise sensitive applications, it can be externally8 K& @6 x* X7 L! ]: W; R. T( w& C
synchronized from 800kHz to 4MHz. The PHMODE pin
5 ]" r- _( f: M# vallowsusercontrolofthephaseoftheoutgoingclock
, o' Y* u& P; X" P! a' y- isignal. The unique constant frequency/controlledon-time
5 d# I) ~6 k3 F& Larchitectureisidealforhighstep-downratioapplications
- z0 g' Q7 j' y! f; Z$ f$ K3 Othat are operating at high frequency while demanding
' q! \; h% ]* Y' F* h( ?fast transient response. Twointernal phase-lock loops
! o F6 g3 b- W1 F1 t" w2 Gsynchronize the internal oscillator to the externalclock
& s& ]# h5 t1 R/ ?8 M' T% sandalsoservostheregulatoron-timetolockontoeither: ~. a- i- r$ S% R( A1 @1 t
theinternalclockortheexternalclockifit’spresent.
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发表于 2023-3-3 18:23
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