REV.
a
ADP3331
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Adjustable Output Ultralow I
Q
, 200 mA,
SOT-23, anyCAP
®
Low Dropout Regulator
FUNCTIONAL BLOCK DIAGRAM
THERMAL
PROTECTION
CC
IN
ADP3331
OUT
GND
Q1
SD
BAND GAP
REF
DRIVER
g
m
ERR
FB
Q2
FEATURES
High Accuracy over Line and Load: ⴞ0.7% @ 25ⴗC,
1.4% over Temperature
Ultralow Dropout Voltage: 140 mV (Typ) @ 200 mA
Can Be Used as a High Current (>1 A) LDO
Controller
Requires Only C
O
= 0.47 F 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
1.5 V to 11.75 V Output Range
–40ⴗC to +85ⴗC Ambient Temperature Range
Ultrasmall Thermally Enhanced Chip-on-Lead™
SOT-23-6 Lead Package
APPLICATIONS
Cellular Telephones
Notebook, Palmtop Computers
Battery-Powered Systems
PCMCIA Regulators
Bar Code Scanners
Camcorders, Cameras
GENERAL DESCRIPTION
The ADP3331 is a member of the ADP330x family of precision
low dropout anyCAP voltage regulators. The ADP3331 operates
with an input voltage range of 2.6 V to 12 V and delivers a load
current up to 200 mA. The ADP3331 stands out from the
conventional LDOs with a novel architecture and an enhanced
process that enables it to offer performance advantages and higher
output current than its competition. Its patented design requires
only a 0.47 mF output capacitor for stability. This device is insensi-
tive to capacitor equivalent series resistance (ESR), and is stable
with any good quality capacitor, including ceramic (MLCC) types
for space restricted applications. The ADP3331 achieves excep-
tional accuracy of ±0.7% at room temperature and ±1.4% overall
accuracy over temperature, line, and load variations. The drop-
out voltage of the ADP3331 is only 140 mV (typical) at 200 mA.
This device also includes a safety current limit, thermal over-
load protection, and a shutdown feature. In shutdown mode, the
ground current is reduced to less than 2 mA. The ADP3331 has
ultralow quiescent current 34 mA (typical) in light load situations.
The SOT-23-6 package has been thermally enhanced using
Analog Device’s proprietary Chip-on-Lead feature to maxi-
mize power dissipation.
V
OUT
V
IN
+
ADP3331
FB
OUT
ERR
ON
OFF
SD
GND
IN
C2
0.47F
C1
0.47F
+
E
OUT
R3
330k⍀
R1
R2
64
Figure 1. Typical Application Circuit
