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2022-5-9 15:00 |
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Features t; |, l. X' x8 {9 f6 F- z8 k
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Wide Input Voltage Range from 4V to 36V
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' e( b% t M/ G$ u4 _Programmable VOUT Range from 0.8V to 24V
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Peak Current Mode Control5 X9 I, H: c6 e, \0 d
4 ^1 m+ S+ ? }8 S5 u8 c+ PIntegrated 6V/3A Peak Gate Drive) z0 R/ N5 g9 h6 s
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Adjustable Cycle-by-Cycle Current Limit by ILIM4 o0 j ~! d$ H' S9 w' l+ E
2 P/ F( g3 } P1 x @2 mAdjustable Frequency: 100kHz~1MHz$ ^3 c) j+ E+ H" P) W
, Y7 M* a* B+ W1 R4 e7 F- E+ R, ?External Soft-Start Limits the Input Inrush Current
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6 i! |- O9 g& o+ G% u- {9 uInternal PMOS Driver for Bypass Mode0 B/ q. y C4 a8 I. G/ s- [+ `9 n) x
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Selectable FCCM or DCM with Pulse Skipping H4 v3 [& t( u
. i+ f2 z8 D( {Cable Impedance Compensation
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Low Dropout Operation with Maximum Duty ; s, V6 A T, v5 ?
Cycle at 99.5%( Y- L+ {% Q* ?2 r
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I2C Programmable Output Range from 3.0V to : D$ A6 G' M! n, x+ f1 A' }8 @
21V in 200mV Per Step
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" Y* r F5 S3 [6 {! NInput Under-Voltage Lockout( ]) N( O9 `6 E2 M% p" H2 f4 B
h2 O8 Z Q! \" D: ?Output OCP, SCP, OVP
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Thermal Shutdown0 C E$ }3 A% y* q
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QFN-20 Package, 3mm×3mm×0.75mm
, ?( o& ?' ?8 ?- C3 |( @/ MDescription
9 c2 K ]5 q B2 F0 e/ rThe ZCC7200 is a synchronous buck controller mainly ! N w! P, i' Q6 c2 |( W
for widely varying input step-down regulator) ~: P1 `% ~, P+ [
applications. The control method is based upon
7 P3 E' _5 l% W! K" ^' `current mode control that enables maximum
2 s( k: [( x& g5 Y$ u" MpeRFormance under transient conditions. The output
; C8 }0 L$ u s/ g" R9 X, x% Tvoltage can be either programmed by the FB pin or
3 W5 t8 n4 @& _configured by the I2C interface from 3.0V to 21V in " `! C$ \7 g9 L2 t+ s# }8 K
200mV per step. It operates as a Buck mode while
4 Z$ _! F( L8 Z; U6 V. Ethe input voltage is sufficiently greater than the
$ _5 t+ w- k0 K% \( _regulated output voltage and transitions to the bypass. M6 X' U" |- h9 t5 H
mode as the input voltage very approaches the output
0 ^$ v% C' o8 M$ N, Q: ?voltage. It also features an adjustable soft-start . D6 ?2 i N; F
function and offers protection features including input
% {& m# r# e/ r0 W8 iUVLO, cycle-by-cycle current limit, output overload : `* E: \. ]- @6 k4 S& x4 E
protection (OLP) or OVP and thermal shutdown. In . c0 B& b4 o7 a4 x; J2 r( I
addition, it features selectable Forced Continuous
5 g$ }' S2 K2 Z7 F7 IConduction Mode (FCCM) or Discontinuous 9 O0 }3 z8 m2 T9 _% y7 ?
Conduction Mode (DCM) operation for light load./ [2 U& n9 Q, @ }
The ZCC7200 integrates an I2C compatible interface
5 e, z2 K! |. N" J6 bfor bypass mode selecting, output voltage setting, etc.5 \. z! ^; R- M9 ? v% R& ?
The ZCC7200 is available in compact QFN3x3-20.. m, J# C0 g" C$ S
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发表于 2021-5-31 17:27
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