ER3110DI Datasheet, PDF (1/23 Pages) Altera Corporation – Synchronous Buck Regulator

ER3110DI
The ER3110DI is a 1A synchronous buck regulator
with an input range of 3V to 36V. It provides an easy to
use, high efficiency low BOM count solution for a
variety of applications.
The ER3110DI integrates both high-side and low-side NMOS
FETs and features a PFM mode for improved efficiency at
light loads. This feature can be disabled if a forced PWM
mode is desired. The part switches at a default frequency of
500kHz but may also be programmed using an external
resistor from 300kHz to 2MHz. The ER3110DI has the ability
to utilize internal or external compensation. By integrating
both NMOS devices and providing internal configuration
options, minimal external components are required, reducing
BOM count and complexity of design.
With the wide V_PVIN range and reduced BOM, the part
provides an easy to implement design solution for a variety
of applications while giving superior performance. It will
provide a very robust design for high voltage industrial
applications as well as an efficient solution for battery
powered applications.
The part is available in a small Pb-free 4mmx3mm DFN
plastic package with a full-range industrial temperature of
-40°C to +125°C.
Enpirion^® Power Datasheet
ER3110DI Wide PVIN 1A
Synchronous Buck Regulator
Datasheet
Features
• Wide input voltage range 3V to 36V
• Synchronous operation for high efficiency
• No compensation required
• Integrated high-side and low-side NMOS devices
• Selectable PFM or forced PWM mode at light loads
• Internal fixed (500kHz) or adjustable switching
frequency 300kHz to 2MHz
• Continuous output current up to 1A
• Internal or external soft-start
• Minimal external components required
• Power-good and enable functions available
Applications
• FPGA Applications
• Industrial control
• Medical devices
• Portable instrumentation
• Distributed power supplies
• Cloud infrastructure
1 SS
FSW ¹²
2
SYNC
COMP ¹¹
R2
CFB
COUT
10µF
CBOOT
100nF
VOUT
L1
22µH
CAVINO
10µF
3 _BOOT
4 _PVIN
5 _SW
6 _PGND
GND
10
FB
9
AVINO
POK
EN
R3
CAVINO
1µF
INTERNAL DEFAULT PARAMETER SELECTION
FIGURE 1. TYPICAL APPLICATION
100
95
90
V_PVIN = 12V
V_PVIN = 5V
85
80
V_PVIN = 15V
75
70
65
V_PVIN = 24V
V_PVIN = 33V
60
55
50
0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1.0
OUTPUT LOAD (A)
FIGURE 2. EFFICIENCY vs LOAD, PFM, V_OUT = 3.3V
101 Innovation Drive
San Jose, CA 95134
www.altera.com
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9001:2008
Registered
May 2014 Altera Corporation
10038
May 28, 2014
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