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PDF MIC7400 Data sheet ( Hoja de datos )
| Número de pieza | MIC7400 | |
| Descripción | Five-Channel Buck Regulator plus One-Boost | |
| Fabricantes | Micrel Semiconductor | |
| Logotipo |  |
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MIC7400
Configurable PMIC, Five-Channel Buck
Regulator Plus One-Boost with
HyperLight Load® and I2C Control
General Description
The MIC7400 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. 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 MIC7400 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
15mm × 15mm and less than 1mm height.
The datasheet and other support documentation can be
found on Micrel’s website 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)
• 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 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
• 15mm × 15mm × 1.25mm solution size
• Thermal-shutdown and current-limit protection
• 36-pin 4.5mm × 4.5mm × 0.85mm FQFN package
(0.4mm pitch)
• −40°C to +125°C 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 3, 2015
Revision 2.0
1 page  
Micrel, Inc.
MIC7400
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. MIC7400 Power-Up/Down ................................................................................................................................... 35
Figure 20. MIC7400 STBY Function (DEFAULT) ................................................................................................................. 36
Figure 21. Connections for Unused Pins .............................................................................................................................. 40
Figure 22. Read/Write Protocol............................................................................................................................................. 47
March 3, 2015
5
Revision 2.0
5 Page 
Micrel, Inc.
MIC7400
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
POR Threshold Input (VSLT)
Logic Level High
1.2 V
Logic Level Low
0.4 V
Bias Current Into Pin
VVSLT = VIN
200 nA
Bias Current Out of Pin
Power-On-Reset (POR) Comparator
VVSLT = 0V
200 nA
POR Upper Comparator Range
AVIN Rising, VVSLT = 0V
POR Lower Comparator Range
AVIN Falling, VVSLT = 0V
POR Upper Comparator Range
AVIN Rising, VVSLT = VIN
POR Lower Comparator Range
AVIN Falling, VVSLT = VIN
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
Buck Power Good Threshold Voltage
Buck Hysteresis(10)
VOUT[1-5] Rising
VOUT[1-5] Falling
Boost Power Good Threshold Voltage
Boost Hysteresis(10)
VOUT[6] Rising
VOUT[6] Falling
Power Good Output Low Voltage
IPG = 10mA (sinking)
Power Good Leakage Current
VPG = 5.5V
Power Good De-Glitch Delay
Output Sequencing Delay(10)
VOUT[1-6] Falling
Thermal Protection
Thermal Shutdown
TJ Rising
Thermal Hysteresis
Note:
10. Guaranteed by design.
2.646
2.548
3.626
3.528
18
2.7
2.6
3.7
3.6
20
50
75
2.754
2.652
3.774
3.672
22
400
200
V
V
V
V
ms
μs
mV
nA
87 91
4
87 91
380
75
0.01
100
0.96 1
95
95
400
200
1.04
%VOUT
%VOUT
%VOUT
mV
mV
nA
μs
ms
160 °C
20 °C
March 3, 2015
11
Revision 2.0
11 Page | ||
| Páginas | Total 30 Páginas | |
| PDF Descargar | [ Datasheet MIC7400.PDF ] | |
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