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PDF MPQ8636 Data sheet ( Hoja de datos )
| Número de pieza | MPQ8636 | |
| Descripción | High Efficiency 10A - 20A 18V Synchronous Step-down Converter | |
| Fabricantes | MPS | |
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MPQ8636
High Efficiency, 10/20A, 18V
Synchronous, Step-Down Converter
Part Number
Package
MPQ8636GLE-
10
MPQ8636HGLE-
10
MPQ8636GVE-
20
QFN(3x4mm)
QFN(3x4mm)
QFN(5x4mm)
Input
Voltage
4.5V to 18V
4.5V to 18V
4.5V to 18V
OVP
Latch-off
Non-
Latch
Non-
Latch
DESCRIPTION
The MPQ8636 is a fully-integrated, high-
frequency, synchronous, rectified, step-down,
switch-mode converter. It offers a very compact
solution to achieve 10A/20A output current over a
wide input supply range, with excellent load and
line regulation. The MPQ8636 operates at high
efficiency over a wide output-current–load range.
The MPQ8636 uses Constant-On-Time (COT)
control to provide a fast transient response and
ease loop stabilization.
An external resistor programs the operating
frequency from 200kHz to 1MHz, and the
frequency keeps nearly constant as input
supply varies with the feed-forward
compensation.
The default under-voltage lockout threshold is
internally set at 4.1V, but a resistor network on
the enable pin can increase this threshold. The
soft-start pin controls the output-voltage startup
ramp. An open-drain power-good signal
indicates that the output is within nominal
voltage range.
It has fully-integrated protection features that
include over-current protection, over-voltage
protection and thermal shutdown.
The MPQ8636 requires a minimal number of
readily-available standard external components
and is available in a 16-Pin QFN 3mm×4mm or a
29-Pin QFN 5mm×4mm package.
FEATURES
Wide 4.5V-to-18V Operating Input Range
10A/20A Output Current
Optimal Low RDS(ON) Internal Power
MOSFETs Per Device
Proprietary Switching-Loss–Reduction
Technique
Adaptive COT for Ultrafast Transient
Response
0.5% Reference Voltage Over 0°C to 70°C
Junction Temperature Range
Programmable Soft-Start Time
Pre-Bias Start-Up
Programmable Switching Frequency from
200kHz to 1MHz
Non-Latch OCP, OVP, and Thermal
Shutdown
Output Adjustable from 0.611V to 13V
APPLICATIONS
Telecom and Networking Systems
Base Stations
Servers
Personal Video Recorders
Flat-Panel Televisions and Monitors
Distributed Power Systems
All MPS parts are lead-free and adhere to the RoHS directive. For MPS green
status, please visit MPS website under Products, Quality Assurance page.
“MPS” and “The Future of Analog IC Technology” are registered trademarks of
Monolithic Power Systems, Inc.
MPQ8636 Rev. 1.23
www.MonolithicPower.com
9/9/2013
MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited.
© 2013 MPS. All Rights Reserved.
1
http://www.Datasheet4U.com
1 page  
MPQ8636 — 10/20A, 18V, SYNCHRONOUS, STEP-DOWN CONVERTER
ABSOLUTE MAXIMUM RATINGS (1)
Supply Voltage VIN .......................................21V
VSW .......................................-0.3V to VIN + 0.3V
VSW (30ns) ..................................-3V to VIN + 3V
VBST .....................................................VSW + 6V
VBST (30ns)........................................VSW + 6.5V
Enable Current IEN(2)................................ 2.5mA
All Other Pins................................ –0.3V to +6V
Continuous Power Dissipation (TA=+25°)(3)
QFN3X4……………………….…..…………2.7W
QFN5X4……………………….…..…………3.3W
Junction Temperature .............................. 150°C
Lead Temperature ................................... 260°C
Storage Temperature............... -65°C to +150°C
Recommended Operating Conditions (4)
Supply Voltage VIN .......................... 4.5V to 18V
Output Voltage VOUT.................... 0.611V to 13V
Enable Current IEN ......................................1mA
Operating Junction Temp. (TJ). -40°C to +125°C
Thermal Resistance (5) θJA θJC
QFN (3x4mm) ........................ 46 ....... 9.... °C/W
QFN (5x4mm) ........................ 38 ....... 6.... °C/W
Notes:
1) Exceeding these ratings may damage the device.
2) Refer to the section “Configuring the EN Control”.
3) The maximum allowable power dissipation is a function of the
maximum junction temperature TJ(MAX), the junction-to-
ambient thermal resistance θJA, and the ambient temperature
TA. The maximum allowable continuous power dissipation at
any ambient temperature is calculated by PD(MAX)=(TJ(MAX)-
TA)/θJA. Exceeding the maximum allowable power dissipation
will cause excessive die temperature, and the regulator will go
into thermal shutdown. Internal thermal shutdown circuitry
protects the device from permanent damage.
4) The device is not guaranteed to function outside of its
operating conditions.
5) Measured on JESD51-7, 4-layer PCB.
MPQ8636 Rev. 1.23
www.MonolithicPower.com
9/9/2013
MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited.
© 2013 MPS. All Rights Reserved.
5
5 Page 
MPQ8636 — 10/20A, 18V, SYNCHRONOUS, STEP-DOWN CONVERTER
TYPICAL CHARACTERISTICS (continued)
MPQ8636-10, MPQ8636H-10, VIN = 12V, VOUT = 1V, L = 1µH, TA = 25°C, unless otherwise noted.
MPQ8636 Rev. 1.23
www.MonolithicPower.com
9/9/2013
MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited.
© 2013 MPS. All Rights Reserved.
11
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| Páginas | Total 41 Páginas | |
| PDF Descargar | [ Datasheet MPQ8636.PDF ] | |
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