ADP3310 Analog Devices, ADP3310 Datasheet - Page 8

• Manufacturer Part Number: ADP3310
• Description: Precision Voltage Regulator Controller
• Manufacturer: Analog Devices

High Current Post Regulator with SOIC PMOS
Post regulation for a switch-mode supply (Figure 15) can be
implemented with a PMOS in an SO-8 package to provide a
significant reduction in peak-to-peak ripple voltage. A constant
dropout voltage in conjunction with low quiescent current yield
a more efficient voltage regulator that can significantly extend
battery life. The bottom waveform of Figure 16 is the output of
the switching regulator. The top waveform is the output of the
post regulator.
In applications where cost is a higher concern than efficiency, a
resistor divider can be used to provide feedback instead of the
current mirror. Power efficiency is lower in cases of light loads.
ADP3310
0.0098 (0.25)
0.0040 (0.10)
0.1574 (4.00)
0.1497 (3.80)
SEATING
PIN 1
PLANE
Dimensions shown in inches and (mm).
0.0500 (1.27)
0.1968 (5.00)
0.1890 (4.80)
8
1
OUTLINE DIMENSIONS
BSC
0.0192 (0.49)
0.0138 (0.35)
8-Lead Small Outline
5
4
0.2440 (6.20)
0.2284 (5.80)
0.0688 (1.75)
0.0532 (1.35)
(SO-8)
–8–
0.0098 (0.25)
0.0075 (0.19)
Figure 16. Pre-and Post-Regulated Voltage
8
0
0.0196 (0.50)
0.0099 (0.25)
0.0500 (1.27)
0.0160 (0.41)
20mV/div
10mV/div
45
5M
5mAOS
55mV
5 s
V
V
OS
O
REV. A