ANALOG DEVICES ADP3333 Service Manual
High Accuracy Ultralow IQ, 300 mA,
ADP3333
THERMAL
PROTECTION
CC
IN
ADP3333
OUT
GND
Q1
BAND GAP
REF
DRIVER
g
m
SD
R1
R2
02615-001
ADP3333
NC
IN
GND
V
OUT
ON
OFF
OUT
SD
NC = NO CONNECT
4
1
2
7
3
+
C
OUT
1µF
C
IN
1µF
V
IN
+
02615-002
FEATURES
High accuracy over line and load: ±0.8% @ 25°C,
±1.8% over temperature
Ultralow dropout voltage: 230 mV (maximum) @ 300 mA
Requires only C
anyCAP is stable with any type of capacitor (including MLCC)
Current and thermal limiting
Low noise
Low shutdown current: < 1 µA
2.6 V to 12 V supply range
−40°C to +85°C ambient temperature range
Ultrasmall 8-lead MSOP package
APPLICATIONS
Cellular phones
PCMCIA cards
Personal digital assistants (PDAs)
DSP/ASIC supplies
GENERAL DESCRIPTION
The ADP3333 is a member of the ADP333x family of precision
low dropout (LDO) anyCAP® voltage regulators. Pin compatible
with the MAX8860, the ADP3333 operates with a wider input
voltage range of 2.6 V to 12 V and delivers a load current up to
300 mA. ADP3333 stands out from other conventional LDOs
with a novel architecture and an enhanced process that enables
it to offer performance advantages over its competition. Its
patented design requires only a 1.0 μF output capacitor for
stability. This device is insensitive to output capacitor equivalent
series resistance (ESR) and is stable with any good quality
capacitor, including ceramic (MLCC) types for space-restricted
applications. The ADP3333 achieves exceptional accuracy of
±0.8% at room temperature and ±1.8% over temperature, line,
and load variations. The dropout voltage of the ADP3333 is
only 140 mV (typical) at 300 mA. This device also includes a
safety current limit, thermal overload protection, and a shutdown
feature. In shutdown mode, the ground current is reduced to
less than 1 μA. The ADP3333 has ultralow quiescent current,
70 μA (typical) in light load situations.
= 1.0 µF for stability
OUT
anyCAP Low Dropout Regulator
FUNCTIONAL BLOCK DIAGRAM
Figure 1.
Figure 2. Typical Application Circuit
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Tel: 781.329.4700
Fax: 781.461.3113 ©2001–2009 Analog Devices, Inc. All rights reserved.
www.analog.com
Rev. B
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