ZCC2139替代ME2139

Siweidianzi

Description
( }/ n) k/ z* B& K( ]6 p4 jThe Z CC2139 series is a CMOS step-up
+ L5 O8 T- S+ m2 oswitching regulator which mainly consists of a
0 s! P, p* a, ^# }5 G4 K) U; areference voltage source, an oscillation circuit,
  H4 ]' j4 D" G, ban error amplifier, a phase compensation circuit,
  P) ]! y! V) E0 ma PWM/PFM switching control circuit. With an
  }" ?& v/ ?6 n/ Yexternal low-ON-resistance Nch Power MOS,
) v8 |) G1 X) Q6 [' Gthis product is applicable to applications
, }' o) f: D& q" w0 A5 ~requiring high efficiency and high output current.
The Z CC 2139 series switches its operation to the
PFM control circuit whose duty ratio is 15 % with
; {) ]; a2 s0 C0 X  B& T9 D" @to the PWM/PFM switching control circuit under
a light load and to prevent decline in the
efficiency by IC operation current.
Feature
 Low voltage operation: Start-up is guaranteed
from 0.9 V(IOUT =1 mA )
/ a* l% r4 ^+ M# a* f% j: m Duty ratio: Built-in PWM/PFM switching control
1 X- I9 T- N7 x0 `circuit 15 to 78 % .
# r7 b* h' Q" `/ |; D/ @ oscillator frequency：1.0MHz
4 r; E# `  ^+ d: b6 n External parts: coil, diode, capacitor, and
transistor
) b7 {4 V7 n% F# W& Y, u Output voltage range: 1.5V ~6.5 V
 Output voltage accuracy：±2%
7 ]# ?8 I. @: n! b% b$ E9 _ Soft start function: 2 mS.
 PACKAGE：SOT23-5
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