ZCC5160-同步降压芯片60V /3A V2.0(1)

四维电子

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( [) c: V3 W: B0 c. |1 d0 XFeatures
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20-μA Quiescent current in regulation
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Input voltage range: 4V-60V
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$ m- Y0 l; n2 z: F& zOutput voltage range: 1V-VIN
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/ P1 S3 s/ @6 a2 C7 v* }3 `Integrated upper and lower power MOSFET
maximum current: 5A
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Adjustable frequency range: 200KHz~2MHz
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( x, i# C( w% S2 T; nAutomatic switching of CCM/DCM/PFM mode
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+ e4 L! ^) Z0 n7 t! {5 PAdjustable soft-start time and Output voltage
, w# b4 `, Q7 q0 [) \$ a0 R  |* Btracking capability
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. C" g7 Z3 j# r) A& w; y1 i- J' _; ^7 YAutomatically switched bypass linear power
supply
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Provides ultra-low input and output dropout
voltage close to 100% duty cycle
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8 Y6 N; r( G. k! rInternal Compensation
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$ @7 U% h+ [9 D8 c/ CPower-good flag
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Dynamic Frequency Stretch Technology
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Support large capacitive load start-up
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Protection function: UVLO/OCP/SCP/OTP/OVP
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Operating junction temperature range: -40℃ to
% ^; P, S4 I  F& {8 g7 p+125℃
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, i6 o4 M$ ^! y; @' f$ G3 d5 aAll pins have ±2000V (HBM) ESD protection
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ETSSOP 16-Pin Exposed Pad Package
Applications
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; e/ h2 {: ~" W; _) B3 B9 P" xIndustrial power supply
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Wide voltage input range power supply
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Low ripple low noise power supply
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Automotive electronic power supply
Description
ZCC5160 is a step-down DC/DC regulator with an
9 Q- Z( v' n* v6 }. ?internal switch, featuring SKIP control mode, which
2 L2 R5 W6 v! ~. m7 r, p* ]combines low quiescent current with high switching
6 z4 J, I6 s$ X/ ]3 `7 b- kfrequency to achieve high-efficiency regulation over a
wide range of load currents. SKIP mode uses a short
; f4 \7 M3 X- O"burst" cycle to switch the inductor current through
  [, ?/ W( N& P' D7 e0 Jthe internal power MOSFET, followed by a sleep
cycle in which the power switch is turned off and the
load current is provided by the output capacitor. At
light loads, burst cycles are a small fraction of the
total cycle time, minimizing average supply current
9 W' \  ^( f/ }; f' P# I. e8 Kand greatly improving efficiency at light loads.
; {& p+ [' u9 L( `( y6 wZCC5160 has a wide input voltage range of 4V-60V,
$ |. s' |" O- N$ }2 V0 }" W! C6 fthus minimizing the need for external surge
suppression components. Making it the best choice
for wide input power range industrial and high cell
$ ~; ^/ l  R/ [; {4 f+ [  ^0 R, Fcount battery pack applications. ZCC5160 is ideal for
0 _1 G2 ?, L$ quse in the 48V automotive power bus range.
ZCC5160 features low-value 100mΩ high-side and
80mΩ low-side MOSFET that provide at least 3A
output current capability with excellent load and line
transient response.
Additional features include: soft-start, thermal
shutdown, UVLO undervoltage lockout, gate driver
undervoltage lockout, maximum duty cycle limit timer,
1 ]+ Q* u2 M; k/ c3 o) A! kand current limit shutdown timer. It also integrates
$ W4 ]7 P2 f  w5 o2 ?output short-circuit protection, providing HICCUP
mode when the FB voltage is low to avoid
6 F. p' \2 ~3 {( ]( Yoverheating during short-circuit.

Crash

串联线性稳压电路主要思路来自于基本线性调整模型。在输入直流电压和负载之间串入一个三极管，其作用就是当输出阻抗发生变化引起输出电压同步变化时，通过某种反馈形式使三极管的发射极也随之变化，从而调整输出电压值，以保持输出电压基本稳定。