ZCC5160-同步降压芯片60V /3A V2.0(1)

四维电子

2 x3 H" o* I% w/ ~* N- R" ]Features
■
/ R8 p9 A5 d" E4 ?20-μA Quiescent current in regulation
■
3 {" w' x: Z7 Q* E6 |1 |& |" uInput voltage range: 4V-60V
1 _1 J5 {) ^# \' n! n" N■
Output voltage range: 1V-VIN
6 w2 l* G# Z7 P! B/ ^% {/ j■
" r5 ^9 v: F! ^Integrated upper and lower power MOSFET
$ H; ?* e1 r; r: h$ R6 V( fmaximum current: 5A
  J) Y' K8 r! k) H1 Q& o■
6 {! |4 R# F( i, E' Q% }Adjustable frequency range: 200KHz~2MHz
- P- Q# R3 }( g. m  v0 r■
6 U' g4 O6 ?/ {0 E8 E0 G, V+ ]Automatic switching of CCM/DCM/PFM mode
■
& r0 e2 g) G5 L0 k4 wAdjustable soft-start time and Output voltage
tracking capability
■
! E' |* r8 Z& I. IAutomatically switched bypass linear power
. @% G2 G9 l- @% ~) i, ^$ Ksupply
■
. I5 ?2 R- b0 k! c, }3 KProvides ultra-low input and output dropout
( w3 ?9 h  \8 L/ |+ a1 [voltage close to 100% duty cycle
' L# P7 `  J/ T, P# V. t■
, V3 z( L. _# PInternal Compensation
■
Power-good flag
■
Dynamic Frequency Stretch Technology
$ x! C' T- g* o( x■
  [: l' m3 \' TSupport large capacitive load start-up
■
Protection function: UVLO/OCP/SCP/OTP/OVP
■
Operating junction temperature range: -40℃ to
3 T7 O! W$ }3 w+ a2 Q+125℃
( K9 X/ l5 ?( Y■
All pins have ±2000V (HBM) ESD protection
; w' X) b/ u1 ]$ l) e" R5 f6 M■
ETSSOP 16-Pin Exposed Pad Package
Applications
■
Industrial power supply
  n. O$ w. n$ W5 I0 M( ~* O5 j( k■
Wide voltage input range power supply
■
* @+ |  Z6 w2 Q- t; X8 Y) m* mLow ripple low noise power supply
  ]* X& x% J+ N, R7 g■
" j, O* v, \3 j& u% \Automotive electronic power supply
Description
ZCC5160 is a step-down DC/DC regulator with an
  }% n' j$ {# [' J; J* Jinternal switch, featuring SKIP control mode, which
combines low quiescent current with high switching
/ d0 h) h' k! @$ A5 D7 vfrequency to achieve high-efficiency regulation over a
wide range of load currents. SKIP mode uses a short
( i( ?" m( r3 b8 ~. W% c- C, L"burst" cycle to switch the inductor current through
the internal power MOSFET, followed by a sleep
# \5 i9 M7 x" h! z; d0 x' a8 scycle in which the power switch is turned off and the
. S( @5 i$ @0 @& o+ H! mload current is provided by the output capacitor. At
light loads, burst cycles are a small fraction of the
% j  O, h' ]. x8 {% ]6 ]! Ptotal cycle time, minimizing average supply current
and greatly improving efficiency at light loads.
/ c  [6 M$ {: q1 J! vZCC5160 has a wide input voltage range of 4V-60V,
8 h- T& U) E6 B& ?' E$ ^, Uthus minimizing the need for external surge
0 X% E# X/ C1 `- |( k6 osuppression components. Making it the best choice
4 I2 U& m# o+ J+ T8 k) qfor wide input power range industrial and high cell
! X" y+ R) O* ?5 [9 o7 g/ f+ z9 dcount battery pack applications. ZCC5160 is ideal for
0 s8 ?, L; s. h- x4 W9 @2 f* `use in the 48V automotive power bus range.
ZCC5160 features low-value 100mΩ high-side and
80mΩ low-side MOSFET that provide at least 3A
8 A8 a' s1 g6 e9 b* K" g: goutput 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,
and current limit shutdown timer. It also integrates
0 D0 l1 Q: J4 h5 Q, u% `output short-circuit protection, providing HICCUP
mode when the FB voltage is low to avoid
0 b- ^6 p5 m; V1 p9 b, soverheating 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。