ADP1614 查看數據表（PDF） - Analog Devices
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ADP1614 Datasheet PDF : 16 Pages
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ADP1614
Data Sheet
THEORY OF OPERATION
The ADP1614 current-mode, step-up switching converter
boosts a 2.5 V to 5.5 V input voltage to an output voltage as
high as 20 V. The internal switch allows a high output current,
and the 650 kHz/1.3 MHz switching frequency allows the use of
tiny external components. The switch current is monitored on a
pulse-by-pulse basis to limit the current to the value set by the
RCL resistor on the CLRES pin.
VIN
L1
CIN
VIN
8
VOUT
R1
FB
2
R2
VBG
COMP
1
RCOMP
CCOMP
VSS
VIN
D
COMPARATOR
ERROR
AMPLIFIER
PWM
COMPARATOR
UVLO
COMPARATOR
VIN
UVLOREF
TSD
COMPARATOR
+
+
DREF
A
CURRENT
SENSING
OSCILLATOR
DRIVER
S
Q
N1
R
CSS
SS
10
5.5µA
SOFT
START
TSENSE
TREF
BG
RESET
BAND GAP
AGND
1.1MΩ
ADP1614
SW
6
SW
7
AGND
9
CLRES
RCL
3
EN
>1.6V
<0.3V
11
EP
4
5
GND GND
Figure 25. Block Diagram with Step-Up Regulator Application Circuit
D1
COUT
VOUT
Rev. 0 | Page 10 of 16
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