5A输出同步降压ZCC3605A

四维电子

' |$ k1 r2 O+ Y; k- J3 \FeaTures
9 W+ w6 P$ n" xHigh Efficiency: Up to 96%
$ O, U2 U1 k: E8 V8 {, J5A Output Current
) P9 \; [. \1 S/ Q4 B, ?) O4V to 20V V IN Range
Integrated Power N-Channel MOSFETs
+ H6 R/ P: K3 Z  ~7 p" n9 e/ q(70mΩ Top and 35mΩ Bottom)
, m8 q3 |8 E' ^/ K3 wAdjustable Frequency 800kHz to 4MHz
' C8 R# u& w% @PolyPhase ® Operation (Up to 12 Phases)
3 S. D$ V4 E, {2 O6 V- VOutput Tracking
8 g9 J& r/ t& _9 N2 o* N( X0.6V ±1% Reference Accuracy
/ b8 z6 N" w1 p% Y3 a$ Q8 FCurrent Mode Operation for Excellent Line and Load
Transient Response
ShutdownModeDrawsLessThan15μASupplyCurrent
ZCC3605: 15V Absolute Maximum V IN
: k- a: [9 i9 x: T+ F2 {ZCC3605A: 22V Absolute Maximum V IN
( k' A8 J: g7 qThe ZCC3605AIs Pin Compatible with the
9 s. Q. |8 v# w) BZCC3605
$ P+ k6 R2 F5 z" d* WAvailable in 24-Pin (4mm  4mm) QFN Package
applicaTions
Point of Load Power Supply
) }" x2 I# |' LPortable Instruments
$ u% W/ q  |+ B3 x( J/ o8 |- yDistributed Power Systems
Battery-Powered Equipment
20V, 5A Synchronous Step-Down Regulator
7 H9 ~4 p. ?9 m) o" v' J( I( c5 yDescripTion
( O/ Y* r7 L$ p' Q, T3 m; }& lThe ZCC3605A is a high efficiency, monolithic
synchro- nous buck regulator using a phase lockable
controlled on-time constant frequency, current mode
8 q# I' C# N! _: Z7 y" |( `architecture. PolyPhase operation allows multiple
5 G3 q- o0 D( L- Y! GZCC3605A regula- torstorunoutofphasewhileusing
$ a4 F" q- x' Q- }5 Ominimal input and output capacitance. The operating
supply voltage range isfrom 20V down to 4V, making it
suitable for dual, triple or quadruple lithium-ion
, J; x6 q- U( Z4 [- f; s' e8 Ybattery inputs as well as point of load power supply
applicationsfroma12Vor5Vrail.
The operating frequency is programmable from 800kHz to
2 x" k6 @/ r: H' c4MHzwithanexternalresistor.Thehighfrequencycapa-
bilityallowstheuseofsmallsuRFacemountinductors.For
switching noise sensitive applications, it can be externally
synchronized from 800kHz to 4MHz. The PHMODE pin
allowsusercontrolofthephaseoftheoutgoingclock
signal. The unique constant frequency/controlledon-time
5 }8 L8 l8 j3 X  c: P+ _architectureisidealforhighstep-downratioapplications
that are operating at high frequency while demanding
fast transient response. Twointernal phase-lock loops
# z# {/ ?4 d6 ~. Bsynchronize the internal oscillator to the externalclock
andalsoservostheregulatoron-timetolockontoeither
" \8 b3 e! d+ u) ]5 T8 `& wtheinternalclockortheexternalclockifit’spresent.
) u2 I4 s( }. e4 c* `/ u! L# q

unfaithful2021

ZCC3605A是一种高效率、单片式采用锁相的同步降压调节器受控持续时间恒定频率。