MP2371
1.8A, 24V, 700KHz
Step-Down Converter
The Future of Analog IC Technology
DESCRIPTION FEATURES
The MP2371 is a monolithic step-down switch
2.5A Peak Output Current
mode converter with a built-in internal power
1.8A Continuous Output Current
MOSFET. It achieves 1.8A continuous output
0.3 Internal Power MOSFET Switch
current over a wide input supply range with
Stable with Low ESR Output Ceramic
excellent load and line regulation. Current mode
Capacitors
operation provides fast transient response and
0.1 A Shutdown Mode
eases loop stabilization. Fault condition
Fixed 700KHz Frequency
protection includes cycle-by-cycle current limiting
Thermal Shutdown
and thermal shutdown.
Cycle-by-Cycle Over Current Protection
The MP2371 requires a minimum number of Wide 4.5V to 24V Operating Input Range
readily available standard external components.
Output Adjustable from 0.81V to 15V
The MP2371 is available in a 2mm x 2mm QFN8
Available in 2x2 QFN8 Package
package.
APPLICATIONS
Broadband Communications Equipment
Digital Entertainment Systems
Distributed Power Systems
Battery Charger
Pre-Regulator for Linear Regulators
MPS and The Future of Analog IC Technology are Registered Trademarks of
Monolithic Power Systems, Inc.
TYPICAL APPLICATION
3 7
VIN IN
BST
GND
D3
2
SW
VOUT
4 5
EN EN FB GND
GND
6
V
IN
I =1.8
OUT_MAX
MP2371 Rev. 1.0 www.MonolithicPower.com 1
2/26/2020 MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited.
2020 MPS. All Rights Reserved. MP2371 1.8A, 24V, 700KHz STEP-DOWN CONVERTER
(1)
PACKAGE REFERENCE ABSOLUTE MAXIMUM RATINGS
Supply Voltage V ........................................ 26V
IN
V ....................................... 0.3V to V + 0.3V
SW IN
TOP VIEW
V ......................................................... V + 6V
BS SW
All Other Pins ................................. 0.3V to +6V
NC 1 8 NC
Junction Temperature ............................... 150C
Lead Temperature .................................... 260 C
SW 2 7 BST
Storage Temperature ............... 65 C to +150 C
IN 3 6 GND
(2)
Recommended Operating Conditions
EN 4 5 FB
Supply Voltage V ........................... 4.5V to 24V
IN
Output Voltage V ....................... 0.81V to 15V
OUT
QFN8
Operating Temperature ............. 40 C to +85 C
(2mm x 2mm)
(3)
Thermal Resistance
JA JC
2x2 QFN8 ................................ 80 ....... 16 ... C/W
Part Number* Package Temperature
Notes:
MP2371DG 2x2 QFN8 40 C to +85C
1) Exceeding these ratings may damage the device.
For Tape & Reel, add suffix Z (eg. MP2371DGZ)
2) The device is not guaranteed to function outside of its
*
For RoHS compliant packaging, add suffix LF (eg.
operating conditions.
MP2371DGLFZ)
3) Measured on approximately 1 square of 1 oz copper.
ELECTRICAL CHARACTERISTICS
V = 12V, T = +25 C, unless otherwise noted.
IN A
Parameters SymbolCondition Min Typ Max Units
Feedback Voltage VFB 4.5V V 24V 0.790 0.810 0.830 V
IN
Feedback Current I V = 0.8V 10 nA
FB FB
(4)
Switch On-Resistance RDS(ON) 0.3
Switch Leakage V = 0V, V = 0V 0 10 A
EN SW
(4)
Current Limit Duty Cycle = 40% 2.0 2.5 A
Oscillator Frequency f V = 0.6V 700 KHz
SW FB
Fold-back Frequency VFB = 0V 230 KHz
Maximum Duty Cycle V = 0.6V 87 %
FB
(4)
Minimum On-Time tON 100 ns
Under-Voltage Lockout Threshold Rising 2.5 2.8 3.1 V
Under-Voltage Lockout Threshold Hysteresis 150 mV
EN Input Low Voltage 0.4 V
EN Input High Voltage 1.5 V
V = 2V 2.1
EN
EN Input Current A
VEN = 0V 0.01
Supply Current (Shutdown) V = 0V 0.1 1.0 A
EN
Supply Current (Quiescent) VEN = 2V, VFB = 1V 0.8 1.0 mA
(4)
Thermal Shutdown 150 C
Note:
4) Guaranteed by design.
MP2371 Rev. 1.0 www.MonolithicPower.com 2
2/26/2020 MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited.
2020 MPS. All Rights Reserved.