MPS同步降压芯片MP9928 中文手册
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MP9928
4V-60V Input, Current Mode,
Synchronous Step-Down
Controller
同步降压
MP9928 Rev. 1.1 www.MonolithicPower.com 1
8/24/2018 MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited.
© 2018 MPS. All Rights Reserved.
The Future of Analog
模拟
IC Technology
DESCRIPTION
The MP9928 is a high-voltage, synchronous
step-down switching regulator
调整
controller
that
can directly step down voltages from up to
60V.
The MP9928 uses PWM current
control
architecture with accurate
cycle-by-cycle
current limiting.
精确逐周期限流的架构
It is capable of driving
dual N-
channel MOSFET switches.
AAM Mode (Advanced asynchronous
mode
高级异步模式
)
enables non-synchronous
operation and PFM
mode to optimize light load
efficiency.
支持异步操作和PFM模式，以优化轻负
载效率。
The operating frequency of MP9928 can be
programmed by an external resistor or
synchronized to an external clock for noise-
sensitive applications. Fault protections are
available including a precision output over
voltage protection (OVP), output over current
protection (OCP), and thermal shutdown.
The MP9928 is available in TSSOP20-EP
package and QFN-20 (3mmx4mm) package.
FEATURES
Wide 4V to 60V Operating Input Range
Dual N-Channel MOSFET Driver
Low Dropout Operation: Maximum Duty
Cycle at 99.5%
Programmable Frequency Range: 100kHz -
1000kHz
180º Out-of-Phase SYNCO
External Soft-Start and PG Pin
Selectable Cycle-by-Cycle Current Limit
Output Over Voltage Protection
Internal LDO with Externally Power Supply
Option
Programmable CCM and AAM Pulse-
Skipping Mode
Accuracy
精确
Over Temperature Protection
TSSOP20-EP package and QFN-20
(3mmx4mm) Package
APPLICATIONS
PD Power Supply in PoE System
USB Dedicated Charging Port (DCP)
Industrial Control Systems
Power Supply for Linear Chargers
All MPS parts are lead-free, halogen-free, and adhere to the RoHS
directive. For MPS green status, please visit the MPS website under quality
assurance. “MPS” and “The Future of Analog IC Technology” are
registered trademarks of Monolithic Power Systems, Inc.
TYPICAL APPLICATION
OUTPUT CURRENT(A)
Efficiency
V
OUT
=5V, AAM
50
60
70
80
90
100
0.01 0.1 1 10
V
IN
=12V
V
IN
=24V
V
IN
=48V
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