MP2364DF Monolithic Power Systems, MP2364DF Datasheet - Page 5

• Manufacturer Part Number: MP2364DF
• Description: Dual 1.5a, 23V, 1.4mhz Step-down Converter
• Manufacturer: Monolithic Power Systems

PIN FUNCTIONS (SOIC16)
MP2364 Rev. 1.4
3/22/2006
Pin #
10
11
12
13
14
15
16
1
2
3
4
5
6
7
8
9
COMPB
COMPA
GNDA
GNDB
Name
SWA
SWB
SSA
BSA
ENB
SSB
BSB
ENA
FBB
FBA
INA
INB
TM
Description
Soft-Start Control for Channel A. 9kΩ output resistance from the pin. Set RC time constant
with external capacitor for soft start ramp time. Ramp Time = 2.2 x 9kΩ x C.
High-Side Driver Boost Pin. Connect a 10nF capacitor from this pin to SWA.
Supply Voltage Channel A. The MP2364 operates from a +4.75V to +23V unregulated input.
Input Ceramic Capacitors should be close to this pin.
Switch Channel A. This connects the inductor to either INA through M1A or to PGA through M2A.
Ground A.
Feedback Voltage for Channel B. This pin is the feedback voltage. The output voltage is ratio scaled
through a voltage divider, and the center point of the divider is connected to this pin. The voltage is
compared to the on board 0.92V reference.
Compensation Channel B. This is the output of the transconductance error amplifier. A series
RC is placed on this pin for proper control loop compensation. Please refer to more in the
datasheet.
Enable/UVLO Channel B. A voltage greater than 2.62V enables operation. Leave ENB
unconnected for automatic startup. An Under Voltage Lockout (UVLO) function can be
implemented by the addition of a resistor divider from V
shutdown the ENB pin voltage needs to be less than 700mV.
Soft-Start Control for Channel B. 9kΩ output resistance from the pin. Set RC time constant
with external capacitor for soft start ramp time. Ramp Time = 2.2x9kΩxC.
High-Side Driver Boost Pin. Connect a 10nF capacitor from this pin to SWB.
Supply Voltage Channel B. The MP2364 operates from a +4.75V to +23V unregulated input.
Input Ceramic Capacitors should be close to this pin.
Switch Channel B. This connects the inductor to either INB through M1B or to PGB through M2B.
Ground B.
Feedback Voltage for Channel A. This pin is the feedback voltage. The output voltage is ratio scaled
through a voltage divider, and the center point of the divider is connected to this pin. The voltage is
compared to the on board 0.92V reference.
Compensation Channel A. This is the output of the transconductance error amplifier. A series
RC is placed on this pin for proper control loop compensation. Please refer to more in the
datasheet.
Enable/UVLO Channel A. A voltage greater than 2.62V enables operation. Leave ENA
unconnected for automatic startup. An Under Voltage Lockout (UVLO) function can be
implemented by the addition of a resistor divider from V
shutdown the ENA pin voltage needs to be less than 700mV.
MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited.
MP2364 — DUAL 1.5A, 23V, 1.4MHz STEP-DOWN CONVERTER
© 2006 MPS. All Rights Reserved.
www.MonolithicPower.com
IN
IN
to GND. For complete low current
to GND. For complete low current
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