MIC2103/04
75V, Synchronous Buck Controllers
featuring Adaptive On-Time Control
Hyper Speed Control™ Family
General Description
Features
The
Micrel
MIC2103/04
are
constant-frequency,
•
Hyper Speed Control™ architecture enables
- High delta V operation (VIN = 75V and VOUT = 1.2V)
- Any Capacitor™ stable
synchronous buck controllers featuring a unique adaptive
ON-time control architecture. The MIC2103/04 operates
over an input supply range from 4.5V to 75V and can be
used to supply up to 15A of output current. The output
voltage is adjustable down to 0.8V with a guaranteed
accuracy of ±1%. The device operates with programmable
switching frequency from 200kHz to 600kHz.
Micrel’s Hyper Light Load® architecture provides the same
high-efficiency and ultra fast transient response as the Hyper
Speed Control architecture under the medium to heavy loads,
but also maintains high efficiency under light load conditions
by transitioning to variable frequency, discontinuous-mode
operation.
•
•
4.5V to 75V input voltage
Adjustable output voltage from 0.8 V to 24V (also
limited by duty cycle)
•
•
•
•
•
•
200kHz to 600kHz, programmable switching frequency
Hyper Light Load Control (MIC2103 only)
Hyper Speed Control (MIC2104 only)
Enable input, Power-Good output
Built-in 5V regulator for single-supply operation
Programmable current limit and fold-back “hiccup”
mode short-circuit protection
The MIC2103/04 offers a full suite of protection features to
ensure protection of the IC during fault conditions. These
include under-voltage lockout to ensure proper operation
under power-sag conditions, internal soft-start to reduce
inrush current, fold-back current limit, “hiccup” mode short-
circuit protection and thermal shutdown.
•
5ms internal soft-start, internal compensation, and
thermal shutdown
Supports safe start-up into a pre-biased output
–40°C to +125°C junction temperature range
Available in 16-pin 3mm × 3mm MLF® package
•
•
•
All support documentation can be found on Micrel’s web
site at: www.micrel.com.
Applications
•
•
•
Distributed power systems
Networking/Telecom Infrastructure
Printers, scanners, graphic cards and video cards
_________________________________________________________________________________________________________________________
Typical Application
V
IN
Efficiency (VIN = 48V)
4.5V to 75V
vs. Output Current (MIC2103)
100µF
2.2µF
x3
100
90
80
70
60
50
40
30
20
10
0
5.0V
3.3V
2.5V
1.8V
1.2V
0.8V
FREQ
VIN
MIC2103/04
BST
DH
PVDD
VDD
AGND
EN
1µF
0.1µF
6.1µH
V
OUT
5V/10A
1µF
EN
PG
SW
95.3k
2.2nF
10k
DL
fSW = 200kHz (CCM)
0.1µF
PG
FB
PGND
ILIM
1.91k
0
1
2
3
4
5
6
7
8
9 10 11 12 13 14
2.21k
OUTPUT CURRENT (A)
Hyper Speed Control, Hyper Light Load, and Any Capacitor are trademarks of Micrel, Inc.
MLF and MicroLeadFrame are registered trademarks of Amkor Technology, Inc.
Micrel Inc. • 2180 Fortune Drive • San Jose, CA 95131 • USA • tel +1 (408) 944-0800 • fax + 1 (408) 474-1000 • http://www.micrel.com
Revision 2.0
November 26, 2013