OMO ElectronicOMO Electronic
Expand menu
Hello, Sign inMy Account
0 Cart

MP2307DN-LF-Z

P1-P3P4-P6P7-P9P10-P12
MP2307 – 3A, 23V, 340KHz SYNCHRONOUS RECTIFIED STEP-DOWN CONVERTER
MP2307 Rev. 1.9 www.MonolithicPower.com 4
5/28/2008 MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited.
© 2008 MPS. All Rights Reserved.
TYPICAL PERFORMANCE CHARACTERISTICS
C1 = 2 x 10µF, C2 = 2 x 22µF, L= 10µH, C
SS
= 0.1µF, T
A
= +25°C, unless otherwise noted.
V
IN
20mV/div.
V
OUT
20mV/div.
V
SW
10V/div.
I
L
1A/div.
MP2307-TPC01
Steady State Test
Waveforms
V
IN
= 12V, V
OUT
= 3.3V, I
OUT
= 0A
V
IN
200mV/div.
V
OUT
20MV/div.
V
SW
V/div.
I
L
2A/div.
MP2307-TPC02
Steady State Test
Waveforms
V
IN
= 12V, V
OUT
= 3.3V, I
OUT
= 3A
V
EN
5V/div.
V
OUT
2V/div.
V
SW
10V/div.
I
L
1A/div.
2ms/div.
MP2307-TPC03
Startup through
Enable Waveforms
V
IN
= 12V, V
OUT
= 3.3V, No Load
V
EN
5V/div.
V
OUT
2V/div.
V
SW
10V/div.
I
L
2A/div.
2ms/div.
MP2307-TP04
Startup Through
Enable Waveforms
V
IN
= 12V, V
OUT
= 3.3V,
I
OUT
= 3A (Resistance Load)
V
EN
5V/div.
V
OUT
2V/div.
V
SW
10V/div.
I
L
1A/div.
2ms/div.
MP2307-TPC05
Shutdown Through
Enable Waveforms
V
IN
= 12V, V
OUT
= 3.3V, No Load
V
OUT
2V/div.
V
SW
10V/div.
V
EN
5V/div.
I
L
2A/div.
MP2307-TPC06
Shutdown Through
Enable Waveforms
V
IN
= 12V, V
OUT
= 3.3V,
I
OUT
= 3A (Resistance Load)
V
OUT
200mV/div.
I
L
1A/div.
I
LOAD
1A/div.
MP2307 -TPC07
Load Transient Test
Waveforms
V
IN
= 12V, V
OUT
= 3.3V,
I
OUT
= 1A to 2A step
V
OUT
2V/div.
I
L
2A/div.
MP2307-TPC08
Short Circuit Test
Waveforms
V
IN
= 12V, V
OUT
= 3.3V
V
OUT
2V/div.
I
L
2A/div.
MP2307-TPC09
Short Circuit Recovery
Waveforms
V
IN
= 12V, V
OUT
= 3.3V
MP2307 – 3A, 23V, 340KHz SYNCHRONOUS RECTIFIED STEP-DOWN CONVERTER
MP2307 Rev. 1.9 www.MonolithicPower.com 5
5/28/2008 MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited.
© 2008 MPS. All Rights Reserved.
PIN FUNCTIONS
Pin # Name Description
1 BS
High-Side Gate Drive Boost Input. BS supplies the drive for the high-side N-Channel MOSFET
switch. Connect a 0.01µF or greater capacitor from SW to BS to power the high side switch.
2 IN
Power Input. IN supplies the power to the IC, as well as the step-down converter switches.
Drive IN with a 4.75V to 23V power source. Bypass IN to GND with a suitably large capacitor
to eliminate noise on the input to the IC. See Input Capacitor.
3 SW
Power Switching Output. SW is the switching node that supplies power to the output. Connect
the output LC filter from SW to the output load. Note that a capacitor is required from SW to
BS to power the high-side switch.
4 GND Ground (Connect the exposed pad to Pin 4).
5 FB
Feedback Input. FB senses the output voltage and regulates it. Drive FB with a resistive
voltage divider connected to it from the output voltage. The feedback threshold is 0.925V. See
Setting the Output Voltage.
6 COMP
Compensation Node. COMP is used to compensate the regulation control loop. Connect a
series RC network from COMP to GND. In some cases, an additional capacitor from COMP to
GND is required. See Compensation Components.
7 EN
Enable Input. EN is a digital input that turns the regulator on or off. Drive EN high to turn on
the regulator; low to turn it off. Attach to IN with a 100k pull up resistor for automatic startup.
8 SS
Soft-Start Control Input. SS controls the soft-start period. Connect a capacitor from SS to GND
to set the soft-start period. A 0.1µF capacitor sets the soft-start period to 15ms. To disable the
soft-start feature, leave SS unconnected.
MP2307 – 3A, 23V, 340KHz SYNCHRONOUS RECTIFIED STEP-DOWN CONVERTER
MP2307 Rev. 1.9 www.MonolithicPower.com 6
5/28/2008 MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited.
© 2008 MPS. All Rights Reserved.
OPERATION
FUNCTIONAL DESCRIPTION
The MP2307 regulates input voltages from
4.75V to 23V down to an output voltage as low
as 0.925V, and supplies up to 3A of load
current.
The MP2307 uses current-mode control to
regulate the output voltage. The output voltage
is measured at FB through a resistive voltage
divider and amplified through the internal
transconductance error amplifier. The voltage at
the COMP pin is compared to the switch current
(measured internally) to control the output
voltage.
The converter uses internal N-Channel
MOSFET switches to step-down the input
voltage to the regulated output voltage. Since
the high side MOSFET requires a gate voltage
greater than the input voltage, a boost capacitor
connected between SW and BS is needed to
drive the high side gate. The boost capacitor is
charged from the internal 5V rail when SW is low.
When the FB pin voltage exceeds 20% of the
nominal regulation value of 0.925V, the over
voltage comparator is tripped and the COMP
pin and the SS pin are discharged to GND,
forcing the high-side switch off.
MP2307_BD01
LOCKOUT
COMPARATOR
INTERNAL
REGULATORS
IN
EN
+
ERROR
AMPLIFIER
1.2V
OVP
RAMP
CLK
0.925V
7V
0.3V
CURRENT
COMPARATOR
CURRENT
SENSE
AMPLIFIER
1.1V
SHUTDOWN
COMPARATOR
7
COMP
6
SS
8
FB
5
GND
4
OSCILLATOR
110/340KHz
S
R
Q
SW
3
BS
1
IN
5V
2
OVP
IN < 4.10V
EN OK
Zener
+
Q
+
+
1.5V
+
+
2.5V
+
+
--
--
--
--
--
--
--
Figure 1—Functional Block Diagram
P1-P3P4-P6P7-P9P10-P12

MP2307DN-LF-Z

Mfr. #:
Buy MP2307DN-LF-Z
Manufacturer:
Monolithic Power Systems (MPS)
Description:
Switching Voltage Regulators 3A/23VSynchRectified Step-down Converter
Lifecycle:
New from this manufacturer.
Delivery:
DHL FedEx Ups TNT EMS
Payment:
T/T Paypal Visa MoneyGram Western Union

Products related to this Datasheet