Datasheet

High Accuracy, Ultralow I
Q
, 500 mA,
anyCAP Low Dropout Regulator
Data Sheet
ADP3335
Rev. D Document Feedback
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FEATURES
High accuracy over line and load: ±0.9% at 25°C, ±1.8% over
temperature
Ultralow dropout voltage: 200 mV (typical) at 500 mA
Requires only C
O
= 1.0 µF for stability
anyCAP® = stable with any type of capacitor (including MLCC)
Current and thermal limiting
Low noise
Low shutdown current: < 10 nA (typical)
2.6 V to 12 V supply range
–40°C to +85°C ambient temperature range
APPLICATIONS
PCMCIA cards
Cellular phones
Camcorders, cameras
Networking systems, DSL/cable modems
Cable set-top box
MP3/CD players
DSP supplies
FUNCTIONAL BLOCK DIAGRAM
gm
CC
Q1
IN
OUT
NR
R1
BANDGAP
REF
GND
SD
ADP3335
+
–
R1
R2
00147-0-001
THERMAL
PROTECTION
DRIVER
Figure 1.
NR
IN
IN
OUT
OUT
OUT
GND
SD
ADP3335
ON
OFF
V
IN
C
IN
1µ
F
+
+
V
OUT
00147-0-002
5
3
2
1
4
6
7
8
C
OUT
1
µF
Figure 2. Typical Application Circuit
GENERAL DESCRIPTION
The ADP3335 is a member of the ADP333x family of precision,
low dropout, anyCAP voltage regulators. It operates with an input
voltage range of 2.6 V to 12 V, and delivers a continuous load
current up to 500 mA. The ADP3335 stands out from conventional
low dropout regulators (LDOs) by using an enhanced process
enabling it to offer performance advantages beyond 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 ADP3335 achieves exceptional accuracy of
±0.9% at room temperature and ±1.8% over temperature, line,
and load.
The dropout voltage of the ADP3335 is only 200 mV (typical) at
500 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 ADP3335 has
a low quiescent current of 80 µA (typical) in light load situations.