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PDF MIC2103 Data sheet ( Hoja de datos )
| Número de pieza | MIC2103 | |
| Descripción | Synchronous Buck Controllers | |
| Fabricantes | Micrel Semiconductor | |
| Logotipo |  |
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Hay una vista previa y un enlace de descarga de MIC2103 (archivo pdf) en la parte inferior de esta página. Total 30 Páginas | ||
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MIC2103/04
75V, Synchronous Buck Controllers
featuring Adaptive On-Time Control
Hyper Speed Control™ Family
General Description
The Micrel MIC2103/04 are constant-frequency,
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.
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.
All support documentation can be found on Micrel’s web
site at: www.micrel.com.
Features
• Hyper Speed Control™ architecture enables
- High delta V operation (VIN = 75V and VOUT = 1.2V)
- Any Capacitor™ stable
• 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
• 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
Applications
• Distributed power systems
• Networking/Telecom Infrastructure
• Printers, scanners, graphic cards and video cards
_________________________________________________________________________________________________________________________
Typical Application
1µF
1µF
EN
PG
VIN FREQ
MIC2103/04
PVDD
BST
VDD
DH
AGND
SW
EN DL
PG PGND
FB ILIM
2.21k
VIN
4.5V to 75V
2.2µF 100µF
x3
0.1µF
6.1µH
95.3k
10k
0.1µF
VOUT
5V/10A
2.2nF
1.91k
Efficiency (VIN = 48V)
vs. Output Current (MIC2103)
100
90
5.0V
80 3.3V
70 2.5V
1.8V
60 1.2V
0.8V
50
40
30
20 fSW = 200kHz (CCM)
10
0
0 1 2 3 4 5 6 7 8 9 10 11 12 13 14
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
November 26, 2013
Revision 2.0
1 page  
Micrel, Inc.
Electrical Characteristics(4) (Continued)
VIN = 48V, VOUT = 5V, VBST – VSW = 5V; TA = 25°C, unless noted. Bold values indicate −40°C ≤ TJ ≤ +125°C.
Parameter
Condition
Min.
Typ.
Enable Control
EN Logic Level High
1.8
EN Logic Level Low
EN Hysteresis
200
EN Bias Current
Oscillator
Switching Frequency
Maximum Duty Cycle
VEN = 48V
VFREQ = VIN
VFREQ = 50%VIN
23
400 600
300
85
Minimum Duty Cycle
Minimum Off-Time
VFB > 0.8V
0
140 200
Soft Start
Soft-Start time
5
Short Circuit Protection
Current-Limit Threshold
Short-Circuit Threshold
Current-Limit Source Current
Short-Circuit Source Current
FET Drivers
VFB = 0.79V
VFB = 0V
VFB = 0.79V
VFB = 0V
-30 -14
-23 -7
60 80
27 36
DH, DL Output Low Voltage
DH, DL Output High Voltage
DH On-Resistance, High State
ISINK = 10mA
ISOURCE = 10mA
VPVDD - 0.1V
or
VBST - 0.1V
2.1
DH On-Resistance, Low State
1.8
DL On-Resistance, High State
1.8
DL On-Resistance, Low State
1.2
SW, BST Leakage Current
MIC2103/04
Max. Units
V
0.6 V
mV
40 µA
750
kHz
%
%
260 ns
ms
0 mV
9 mV
100 µA
47 µA
0.1 V
V
3.3 Ω
3.3 Ω
3.3 Ω
2.3 Ω
50 µA
November 26, 2013
5
Revision 2.0
5 Page 
Micrel, Inc.
Typical Characteristics (Continued)
VIN Shutdown Current
600 vs. Input Voltage
540
480
420
360
300
240
180
120
60 VEN = 0V
0
10 15 20 25 30 35 40 45 50 55 60 65 70 75
INPUT VOLTAGE (V)
VDD Voltage
10 vs. Input Voltage
8
IDD = 10mA
6
4
IDD = 40mA
2 VOUT = 5.0V
fSW = 200kHz
0
10 15 20 25 30 35 40 45 50 55 60 65 70 75
INPUT VOLTAGE (V)
Switching Frequency
vs. Input Voltage
300
260
220
180
140
VOUT = 5.0V
IOUT = 2A
100
10 15 20 25 30 35 40 45 50 55 60 65 70 75
INPUT VOLTAGE (V)
Output Peak Current Limit
vs. Input Voltage
25
20
15
10
5
VOUT = 5.0V
fSW = 200kHz
0
10 15 20 25 30 35 40 45 50 55 60 65 70 75
INPUT VOLTAGE (V)
Feedback Voltage
vs. Temperature
0.812
0.808
0.804
0.800
0.796
0.792
-50
VIN = 48V
VOUT = 5.0V
IOUT = 0A
-25 0 25 50 75 100 125
TEMPERATURE (°C)
Output Peak Current Limit
vs. Temperature
21
18
15
12
9
6 VIN =48V
3 VOUT = 5.0V
fSW = 200kHz
0
-50 -25 0 25 50 75 100 125
TEMPERATURE (°C)
MIC2103/04
Enable Threshold
vs. Input Voltage
1.50
Rising
1.20
0.90
Falling
0.60
0.30 Hyst
0.00
10 15 20 25 30 35 40 45 50 55 60 65 70 75
INPUT VOLTAGE (V)
Switching Frequency
vs. Output Current
300
250
200
150
100
0
25°C
125°C
-40°C
VIN = 48V
VOUT = 5.0V
2468
OUTPUT CURRENT (A)
10
VIN Shutdown Current
vs. Temperature
400
320
240
160
80
0
-50
VIN =48V
VEN = 0V
IOUT = 0A
-25 0 25 50 75 100 125
TEMPERATURE (°C)
November 26, 2013
11
Revision 2.0
11 Page | ||
| Páginas | Total 30 Páginas | |
| PDF Descargar | [ Datasheet MIC2103.PDF ] | |
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