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PDF MPQ8632HGLE-10 Data sheet ( Hoja de datos )
| Número de pieza | MPQ8632HGLE-10 | |
| Descripción | High Efficiency 18V Synchronous Step-down Converter Family | |
| Fabricantes | MPS | |
| Logotipo |  |
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MPQ8632
High Efficiency 18V Synchronous
Step-down Converter Family for 4A to 20A
Part Number
MPQ8632GLE-4
Current
Rating (A)
4
MPQ8632GLE-6
6
MPQ8632GLE-8
8
MPQ8632HGLE-10
10
MPQ8632GLE-10
10
MPQ8632GLE-12
12
MPQ8632GVE-15
MPQ8632GVE-20
15
20
Input Voltage
2.5V to 18V
2.5V to 18V
2.5V to 18V
2.5V to 18V
2.5V to 18V
2.5V to 18V
2.5V to 18V
2.5V to 18V
OVP Mode
Non-Latch
Non-Latch
Non-Latch
Non-Latch
Latch-Off
Non-Latch
Non-Latch
Non-Latch
DESCRIPTION
The MPQ8632 is a fully integrated high
frequency synchronous rectified step-down
switch mode converter. It offers a very compact
solution to achieve 4A/6A/8A/10A/12A/15A/20A
output current over a wide input supply range
with excellent load and line regulation.
The MPQ8632 uses Constant-On-Time (COT)
control mode to provide 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 feedforward
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 MPQ8632 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
Low Input Voltage Range from 2.5V:
-- 2.5V to 18V with External 5V Bias
-- 4.5V to 18V with Internal Bias
Scalable Family of Products for 4A to 20A
Output Current Applications
-- 4A/6A/8A/10A/12A Share the Same
Footprint
--15A/20A Share the Same Footprint, with
Slight Change on Power Stage Section
from 4A/6A/8A/10A/12A
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 0C to
70C 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 Protection
Output Adjustable from 0.611V to 13V
APPLICATIONS
Telecom and Networking Systems
Base Stations
Servers
Personal Video Recorders
Flat Panel Television 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.
MPQ8632 Rev.1.24
www.MonolithicPower.com
8/28/2013
MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited.
© 2013 MPS. All Rights Reserved.
1
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1 page  
MPQ8632 HIGH EFFICIENCY 18V SYNCHRONOUS STEP-DOWN CONVERTER FAMILY FOR 4A TO 20A
TOP VIEW
TOP VIEW
EN 1
FREQ 2
FB 3
SS 4
AGND 5
PG 6
VCC 7
BST 8
20 PGND
19 PGND
18 SW
17 SW
16 SW
15 SW
14 PGND
13 PGND
EN 1
FREQ 2
FB 3
SS 4
AGND 5
PG 6
VCC 7
BST 8
20 PGND
19 PGND
18 SW
17 SW
16 SW
15 SW
14 PGND
13 PGND
Part Number*
Package
MPQ8632GVE-15
Junction Temperature
QFN (5x4mm)
Top Marking
–40C to +125C
MP8632
E15
* For Tape & Reel, add suffix –Z (eg. MPQ8632GVE-15–Z)
Part Number*
Package
MPQ8632GVE-20
Junction Temperature
QFN (5x4mm)
Top Marking
–40C to +125C
MP8632
E20
* For Tape & Reel, add suffix –Z (eg. MPQ8632GVE-20–Z)
MPQ8632 Rev.1.24
www.MonolithicPower.com
8/28/2013
MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited.
© 2013 MPS. All Rights Reserved.
5
5 Page 
MPQ8632 HIGH EFFICIENCY 18V SYNCHRONOUS STEP-DOWN CONVERTER FAMILY FOR 4A TO 20A
MPQ8632GVE-15, MPQ8632GVE-20
PIN #
1
2
3
4
5
6
7
8
15-18,
25-29
10-14, 19-23
9, 24
Name
EN
FREQ
FB
SS
AGND
PG
VCC
BST
SW
PGND
IN
Description
Enable. Digital input that turns the regulator on or off. Drive EN high to turn on the
regulator; drive it low to turn it off. Connect EN to IN through a pull-up resistor or a
resistive voltage divider for automatic startup. Do not float this pin.
Frequency Set. Require a resistor connected between FREQ and IN to set the
switching frequency. The input voltage and the resistor connected to the FREQ pin
determine the ON time. The connection to the IN pin provides line feed-forward and
stabilizes the frequency during input voltage’s variation.
Feedback. Connect to the tap of an external resistor divider from the output to GND
to set the output voltage. Place the resistor divider as close to FB pin as possible.
Avoid using vias on the FB traces.
Soft-Start. Connect an external capacitor to program the soft start time for the switch
mode regulator.
Analog Ground. The control circuit reference.
Power-Good. The output is an open drain signal. Requires a pull-up resistor to a DC
voltage to indicate HIGH if the output voltage exceeds 91% of the nominal voltage.
There is a delay from FB ≥ 91% to when PG goes high.
Internal 4.8V LDO Output. Powers the driver and control circuits. 5V external bias
can disable the internal LDO. Decouple with a ≥1µF ceramic capacitor as close to the
pin as possible. For best results, use X7R or X5R dielectric ceramic capacitors for
their stable temperature characteristics.
Bootstrap. Require a capacitor connected between SW and BST pins to form a
floating supply across the high-side switch driver.
Switch Output. Connect to the inductor and bootstrap capacitor. The high-side switch
drives these pins up to VIN during the PWM duty cycle’s ON time. The inductor
current drives the SW pin negative during the OFF-time. The low-side switch’s ON-
resistance and the internal Schottky diode holds the negative voltage. Connect all
SW pins using wide PCB traces.
System Ground. Reference ground of the regulated output voltage. PCB layout
requires extra care. Connect using wide PCB traces.
Supply Voltage. Supplies power to the internal MOSFET and regulator. The
MPQ8632GVE operate from a 4.5V-to-18V input rail. If 5V external bias is tied to
VCC pin, the input voltage can be low as 2.5V. Requires an input decoupling
capacitor. Connect using wide PCB traces and multiple vias.
MPQ8632 Rev.1.24
www.MonolithicPower.com
8/28/2013
MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited.
© 2013 MPS. All Rights Reserved.
11
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| PDF Descargar | [ Datasheet MPQ8632HGLE-10.PDF ] | |
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