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PDF MIC45205-2 Data sheet ( Hoja de datos )
| Número de pieza | MIC45205-2 | |
| Descripción | 26V 6A DC-to-DC Power Module | |
| Fabricantes | Micrel Semiconductor | |
| Logotipo |  |
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Hay una vista previa y un enlace de descarga de MIC45205-2 (archivo pdf) en la parte inferior de esta página. Total 30 Páginas | ||
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MIC45205-1/-2
26V/6A DC-to-DC Power Module
General Description
Micrel’s MIC45205 is a synchronous step-down regulator
module, featuring a unique adaptive ON-time control
architecture. The module incorporates a DC-to-DC
controller, power MOSFETs, bootstrap diode, bootstrap
capacitor, and an inductor in a single package; simplifying
the design and layout process for the end user.
This highly-integrated solution expedites system design
and improves product time-to-market. The internal
MOSFETs and inductor are optimized to achieve high
efficiency at a low output voltage. The fully-optimized
design can deliver up to 6A current under a wide input
voltage range of 4.5V to 26V, without requiring additional
cooling.
The MIC45205-1 uses Micrel’s HyperLight Load® (HLL)
MIC45205-2 uses Micrel’s Hyper Speed Control™
architecture which enables ultra-fast load transient
response, allowing for a reduction of output capacitance.
The MIC45205 offers 1% output accuracy that can be
adjusted from 0.8V to 5.5V with two external resistors.
Additional features include thermal shutdown protection,
input undervoltage lockout, adjustable current limit, and
short circuit protection. The MIC45205 allows for safe
start-up into a pre-biased output.
Datasheet and other support documentation can be found
on Micrel’s web site at: www.micrel.com.
Features
• No compensation required
• Up to 6A output current
• >93% peak efficiency
• Output voltage: 0.8V to 5.5V with ±1% accuracy
• Adjustable switching frequency from 200kHz to 600kHz
• Enable input and open-drain power good output
• Hyper Speed Control (MIC45205-2) architecture
enables fast transient response
• HyperLight Load (MIC45205-1) improves light load
efficiency
• Supports safe startup into pre-biased output
• CISPR22, Class B compliant
• –40°C to +125°C junction temperature range
• Thermal-shutdown protection
• Short-circuit protection with hiccup mode
• Adjustable current limit
• Available in 52-pin 8mm × 8mm × 3mm QFN package
Applications
• High power density point-of-load conversion
• Servers, routers, Networking, and base stations
• FPGAs, DSP, and low-voltage ASIC power supplies
• Industrial and medical equipment
Typical Application
Efficiency (VIN = 12V)
vs. Output Current (MIC45205-1)
100
5.0VOUT
90 3.3VOUT
80 2.5VOUT
70 1.8VOUT
1.5VOUT
60 1.2VOUT
50 1.0VOUT
0.8VOUT
40
30
20 fSW = 600kHz
10
0123456789
OUTPUT CURRENT (A)
Hyper Speed Control is a trademark of Micrel, Inc.
HyperLight Load is a registered trademark of Micrel, 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
January 21, 2015
Revision 2.0
1 page  
Micrel, Inc.
MIC45205
Electrical Characteristics(5) (Continued)
VIN = VEN = 12V, VOUT = 3.3V, VBST − VSW = 5V, TJ = +25ºC. Bold values indicate −40ºC < TJ < +125ºC, unless otherwise noted.
Parameter
Condition
Min. Typ. Max. Units
Enable Control
EN Logic Level High
1.8 V
EN Logic Level Low
0.6 V
EN Hysteresis
200 mV
EN Bias Current
Oscillator
VEN = 12V
5 10 µA
Switching Frequency
VFREQ = VIN, IOUT = 2A
VFREQ = 50% VIN, IOUT = 2A
400 600
350
750
kHz
Maximum Duty Cycle
85 %
Minimum Duty Cycle
VFB = 1V
0%
Minimum Off-Time
140 200
260
ns
Soft-Start
Soft-Start Time
Short-Circuit Protection
5 ms
Current-Limit Threshold
Short-Circuit Threshold
Current-Limit Source Current
Short-Circuit Source Current
Leakage
SW, BST Leakage Current
FREQ Leakage Current
Power Good (PG)
PG Threshold Voltage
PG Hysteresis
PG Delay Time
PG Low Voltage
Thermal Protection
VFB = 0.79V
VFB = 0V
VFB = 0.79V
VFB = 0V
Sweep VFB from Low-to-High
Sweep VFB from High-to-Low
Sweep VFB from Low-to-High
VFB < 90% × VNOM, IPG = 1mA
−30 −14
−23 −7
55 70
25 35
0
9
85
45
mV
mV
µA
µA
10 µA
10 µA
85 90
95 % VOUT
6 % VOUT
100 µs
70 200 mV
Overtemperature Shutdown
TJ Rising
Overtemperature Shutdown Hysteresis
160 °C
15 °C
January 21, 2015
5
Revision 2.0
5 Page 
Micrel, Inc.
Functional Characteristics (Continued)
MIC45205
January 21, 2015
11
Revision 2.0
11 Page | ||
| Páginas | Total 30 Páginas | |
| PDF Descargar | [ Datasheet MIC45205-2.PDF ] | |
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