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PDF MIC7401 Data sheet ( Hoja de datos )
| Número de pieza | MIC7401 | |
| Descripción | Five-Channel Buck Regulator plus One-Boost | |
| Fabricantes | Micrel Semiconductor | |
| Logotipo |  |
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Hay una vista previa y un enlace de descarga de MIC7401 (archivo pdf) en la parte inferior de esta página. Total 30 Páginas | ||
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MIC7401
Configurable PMIC, Five-Channel
Buck Regulator plus One-Boost with
HyperLight Load®, I2C Control, and Enable
General Description
The MIC7401 is a powerful, highly-integrated,
configurable, power-management IC (PMIC) featuring five
synchronous buck regulators, one boost regulator, and
high-speed I2C interface with an internal EEPROM.
The device offers two distinct modes of operation “stand-
by mode” and “normal mode” intended to provide an
energy optimized solution suitable for portable handheld,
and infotainment applications.
In normal mode, the programmable switching converters
can be configured to support a variety of features,
including start-up sequencing, timing, soft-start ramp,
output voltage levels, current-limit levels, and output
discharge for each channel.
In stand-by mode the PMIC can configured in a low power
state by either disabling an output or by changing the
output voltage to a lower level. Independent exit from
stand-by mode can be achieved either by I2C
communication or the external STBY pin.
The device has five synchronous buck regulators with
high-speed adaptive on-time control supporting even the
challenging ultra-fast transient requirement for core
supplies. The one boost regulator provides a flash-memory
programming supply that delivers up to 200mA of output
current. The boost is equipped with an output disconnect
switch that opens if a short-to-ground fault is detected.
An internal EEPROM enables a single-chip solution across
many platforms by allowing the designer to customize the
PMIC for their design. Modifications can be made without
the need to re-approve a new PMIC, saving valuable
design resources and time.
All switchers provide light-load efficiency with HyperLight
Load® mode for buck and PFM mode for boost. An
additional benefit of this proprietary architecture is very-low
output ripple voltage throughout the entire load range with
the use of small output capacitors. The MIC7401 is
designed for use with a small inductors (down to 0.47µH
for buck, 1.5µH for boost), and an output capacitor as
small as 10µF for buck, enabling a total solution size of
12mm × 8.5mm and less than 1mm height on top layer.
The datasheet and other support documentation can be
found on Micrel’s web site at: www.micrel.com.
Features
Input voltage: 2.4V to 5.5V
Five independent synchronous bucks up to 3A
One independent non-synchronous boost 200mA
200µA quiescent current (all regulators on)
5µA typical shutdown current
93% peak buck efficiency, 85% typical efficiency at 1mA
Dual power mode: stand-by and normal mode
I²C interface up to 3.4MHz
I²C on-the-fly EEPROM programmability, featuring:
Buck and boost output voltage scaling
Power-on-Reset (PoR) threshold and delay
Power-up sequencing/sequencing delay
Buck and boost current limit
Buck and boost pull-down when disabled
Individual ON, OFF, and standby modes
Soft-start and global power-good masking
23µA buck typical quiescent current
70µA boost typical quiescent current
1.5% output accuracy over temperature/line/load
2.0MHz boost switching frequency
1.3MHz buck operation in continuous mode
Ultra-fast buck transient response
12mm × 8.5mm × 1.25mm solution size (top layer)
Thermal-shutdown and current-limit protection
36-pin 4.5mm × 4.5mm × 0.85mm FQFN package
(0.4mm pitch)
40C to +125C junction temperature range
Applications
Client and enterprise solid state drives (SSD)
Consumer and in-vehicle infotainment devices
Multimedia devices
Portable handheld devices
Security camera
Gaming machines
Service provider gateways
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
March 16, 2015
Revision 1.0
1 page  
Micrel, Inc.
MIC7401
List of Figures
Figure 1. Buck Soft-Start..................................................................................................................................................... 25
Figure 2. Buck Soft-Start..................................................................................................................................................... 26
Figure 3. Buck DVC Control Ramp ..................................................................................................................................... 26
Figure 4. Buck DVC Control Ramp ..................................................................................................................................... 27
Figure 5. Boost Soft-Start Ramp......................................................................................................................................... 27
Figure 6. Boost Soft-Start.................................................................................................................................................... 27
Figure 7. Boost DVC Control Ramp.................................................................................................................................... 28
Figure 8. Standard Delay Time ........................................................................................................................................... 29
Figure 9. Hot Plug − VIN Rising ........................................................................................................................................... 30
Figure 10. POR ..................................................................................................................................................................... 30
Figure 11. Hot Un-Plug − VIN Falling ..................................................................................................................................... 30
Figure 12. I2C Stand-By Mode .............................................................................................................................................. 31
Figure 13. Output Pull-Down Resistance.............................................................................................................................. 31
Figure 14. STBY-to-NORMAL Transition (DEFAULT) .......................................................................................................... 32
Figure 15. Pre-Biased Output Voltage .................................................................................................................................. 32
Figure 16. Power Dissipation ................................................................................................................................................ 33
Figure 17. Power Derating Curve.......................................................................................................................................... 33
Figure 18. Hot-Plug Input Voltage Spike............................................................................................................................... 34
Figure 19. MIC7401 Power-Up/-Down .................................................................................................................................. 35
Figure 20. MIC7401 STBY Function (DEFAULT) ................................................................................................................. 36
Figure 21. Connections for Unused Pins .............................................................................................................................. 40
Figure 22. Read/Write Protocol............................................................................................................................................. 47
March 16, 2015
5
Revision 1.0
5 Page 
Micrel, Inc.
MIC7401
Electrical Characteristics(7) (Continued)
VIN = AVIN = PVIN(1-6) = 5.0V; VOUT1 = 1.8V; VOUT2 = 1.1V; VOUT3 = 1.8V; VOUT4 = 1.05V; VOUT5 = 1.25V; VOUT6 = 12V (refer to the
Evaluation Board Schematic for component values). TA = 25°C, unless otherwise noted. Bold values indicate −40°C ≤ TJ ≤ +125°C.
Parameter
Conditions
Min.
Typ.
Max.
Unit
Enable Input (EN)
Logic Level High
Logic Level Low
VEN Rising, Regulator Enabled
VEN Falling, Regulator Shutdown
1.2
V
0.4 V
Bias Current Into Pin
VEN = VIN
200 nA
Bias Current Out of Pin
Power-On-Reset (POR) Comparator
VEN = 0V
200 nA
POR Upper Comparator Range
AVIN Rising
POR Lower Comparator Range
AVIN Falling
Power Reset Output (POR) and Timer
POR Delay
POR Deglitch Delay
AVIN Falling
POR Output Low Voltage
IPOR = 10mA (sinking)
POR Leakage Current
Global Power Good Output (PG)
VPOR = 5.5V
2.646
2.548
18
2.7
2.6
20
50
75
2.754
2.652
22
400
200
V
V
ms
μs
mV
nA
Buck Power Good Threshold Voltage
Buck Hysteresis (10)
Boost Power Good Threshold Voltage
Boost Hysteresis (10)
Power Good Output Low Voltage
Power Good Leakage Current
Power Good De-Glitch Delay
Output Sequencing Delay (10)
Thermal Protection
Thermal Shutdown
Thermal Hysteresis
Note:
10. Guaranteed by design.
VOUT[1-5] Rising
VOUT[1-5] Falling
VOUT[6] Rising
VOUT[6] Falling
IPG = 10mA (sinking)
VPG = 5.5V
VOUT[1-6] Falling
TJ Rising
87 91
4
87 91
380
75
0.01
100
0.96 1
160
20
95
95
400
200
1.04
%VOUT
%VOUT
%VOUT
mV
mV
nA
μs
ms
°C
°C
March 16, 2015
11
Revision 1.0
11 Page | ||
| Páginas | Total 30 Páginas | |
| PDF Descargar | [ Datasheet MIC7401.PDF ] | |
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