ZCC5160-同步降压芯片60V /3A V2.0(1)

四维电子

2 r5 I5 p# l% d3 M  ZFeatures
, h7 W8 `& q$ O■
, F9 v! o6 M+ R/ J, n20-μA Quiescent current in regulation
■
Input voltage range: 4V-60V
: }3 I2 z/ _  n) g$ b■
) [- K# z: N  I) K* {& D7 C2 J* uOutput voltage range: 1V-VIN
■
9 G) |0 j" t: P; Y! S' mIntegrated upper and lower power MOSFET
: R3 O+ C* D0 @9 k5 Y( k& Smaximum current: 5A
( {) I, d5 O5 b( D) o% A. K■
Adjustable frequency range: 200KHz~2MHz
■
& K: j  _. }* h6 `Automatic switching of CCM/DCM/PFM mode
% |$ y) O3 v8 K5 G■
0 l, A" y5 y+ h( p8 v# @8 BAdjustable soft-start time and Output voltage
3 k$ T, v$ @& A3 s; w$ [6 E; l; X  N+ Utracking capability
4 `' i3 g2 n2 V6 Y" H+ f6 W■
) \; Z9 ^: f- D6 N9 QAutomatically switched bypass linear power
/ J) g, ]' c  M( ^  x8 Ssupply
■
$ Z: `# R% {& v9 e0 W2 _4 a' UProvides ultra-low input and output dropout
8 Z$ f# K5 f: M. Qvoltage close to 100% duty cycle
) A/ H2 m8 y) K■
9 G. ]8 C8 ?" o: D8 l! T2 C  ~Internal Compensation
■
Power-good flag
0 }7 D* R& g; C% r$ r■
Dynamic Frequency Stretch Technology
■
Support large capacitive load start-up
1 z; b+ p1 W0 G, m3 {■
Protection function: UVLO/OCP/SCP/OTP/OVP
■
Operating junction temperature range: -40℃ to
+125℃
% v/ u6 O. I: e+ e, j2 G■
All pins have ±2000V (HBM) ESD protection
■
* |! q- l9 V- Z; iETSSOP 16-Pin Exposed Pad Package
- M/ f; X8 @7 w! i9 ^0 y7 kApplications
5 L* @) n3 s* Y! e% O: R1 ^$ I- P■
! Q0 b: ?* W) m5 ~9 ]Industrial power supply
■
/ R* o$ z6 ^$ k9 a6 nWide voltage input range power supply
/ L# h3 Q" p) ^■
Low ripple low noise power supply
■
Automotive electronic power supply
; u0 n! f6 }, o% F: a+ i- YDescription
ZCC5160 is a step-down DC/DC regulator with an
- d/ w' Z, ~- C9 x- v" n( ^7 H7 vinternal switch, featuring SKIP control mode, which
4 x' G, K/ {# q- z" l. g: K* Ycombines low quiescent current with high switching
6 I. Z: a7 M5 ]frequency to achieve high-efficiency regulation over a
wide range of load currents. SKIP mode uses a short
"burst" cycle to switch the inductor current through
' R: S  v# \6 c% M% S; y) wthe internal power MOSFET, followed by a sleep
: }' F7 I2 U) vcycle in which the power switch is turned off and the
2 U( b: }: c0 S( Wload 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
7 a# _/ n1 n0 B' |7 oand greatly improving efficiency at light loads.
7 ~4 B* _9 a4 ?1 s3 L! O0 qZCC5160 has a wide input voltage range of 4V-60V,
thus minimizing the need for external surge
suppression components. Making it the best choice
* z, y! b1 q9 @3 Bfor wide input power range industrial and high cell
* n& p8 {9 E0 m  ]count battery pack applications. ZCC5160 is ideal for
use in the 48V automotive power bus range.
' M9 c* _& [& G0 |ZCC5160 features low-value 100mΩ high-side and
* A* R* F+ x+ N6 r) j7 l# }80mΩ low-side MOSFET that provide at least 3A
% D& y* r7 V% U9 {' o& z( Soutput current capability with excellent load and line
7 R* e9 F# d8 z5 utransient response.
. ~! F* w: w# ^3 `+ jAdditional features include: soft-start, thermal
/ a" ?8 W5 `$ X8 Kshutdown, UVLO undervoltage lockout, gate driver
6 p7 a  c. ^8 Bundervoltage lockout, maximum duty cycle limit timer,
( K" ^! z$ R. Gand current limit shutdown timer. It also integrates
output short-circuit protection, providing HICCUP
" L; ?! B* Q  D' i4 Q( Gmode when the FB voltage is low to avoid
overheating 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。