MP1593DN データシートの表示（PDF） - Monolithic Power Systems
部品番号
コンポーネント説明
一致するリスト
MP1593DN Datasheet PDF : 11 Pages
| |||
MP1593 – 3A, 28V, 385KHz STEP-DOWN CONVERTER
TYPICAL PERFORMANCE CHARACTERISTICS (continued)
Refer to Typical Application Schematic on Page 1
Switching
Waveforms
IL
1A/Div.
VOUT
10mV/Div.
VIN
100mV/Div.
VSW
10V/Div.
Efficiency vs
Load Current
100
95
VIN = 5V
90
85
80
VIN = 24V
75
VIN = 12V
70
65
60
55
50
0 500 1000 1500 2000 2500 3000 3500
LOAD CURRENT (mA)
Efficiency vs
Load Current
100
95
VIN = 9V
90
85
VIN = 24V
80
VIN = 12V
75
70
65
60
55
50
0 500 1000 1500 2000 2500 3000 3500
LOAD CURRENT (mA)
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 10nF or greater capacitor from SW to BS to power the high-side switch.
Power Input. IN supplies power to the IC. Drive IN with a 4.75V to 28V power source. Bypass IN
2
IN to GND with a suitably large capacitor to eliminate noise on the input to the IC. See Input
Capacitor.
Power Switching Output. SW is the switching node that supplies power to the output. Connect
3 SW 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. Note: Connect the exposed pad to Pin 4.
Feedback Input. FB senses the output voltage and regulates it. Drive FB with a resistive voltage
5
FB divider from the output voltage to ground. The feedback threshold is 1.222V. See Setting the
Output Voltage.
Compensation Node. COMP is used to compensate the regulation control loop. Connect a series
6 COMP RC network from COMP to GND. In some cases, an additional capacitor from COMP to GND is
required. See Compensation.
Enable Input. EN is a digital input that turns the regulator on or off. Drive EN high to turn on the
7
EN
regulator; low to turn it off. An Under-Voltage Lockout (UVLO) function can be implemented by
the addition of a resistor divider from VIN to GND. For complete low current shutdown the EN pin
voltage needs to be less than 0.7V. For automatic startup leave EN disconnected.
Soft-Start Control Input. SS controls the soft-start period. Connect a capacitor from SS to GND
8 SS to set the soft-start period. A 0.1µF capacitor sets the soft-start period to 10ms. To disable the
soft-start feature, leave SS disconnected.
MP1593 Rev. 1.9
www.MonolithicPower.com
4
9/14/2006
MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited.
© 2006 MPS. All Rights Reserved.
Share Link: 