MP1580HS MPS [Monolithic Power Systems], MP1580HS Datasheet - Page 2

• Manufacturer Part Number: MP1580HS
• Description: 2A MP1580 Step Down Switch Mode Converter
• Manufacturer: MPS [Monolithic Power Systems]

Monolithic Power Systems
Figure 2: EV0007 Schematic
Board Operation
This board is laid out to accommodate most commonly used Inductors and Output Capacitors and to
be programmed for most standard Output Voltages.
1)
2)
3)
4)
5)
EV0007 Rev 1.5_08/14/02
External
Supply
Power
- +
Attach positive end of load to pin 1 = 2 and negative end of load to pin 3 = 4 of connector CN2.
For the required output voltage (VOUT = 1.22, 1.5, 1.8, 2.5, 3.3 or 5V) solder blob the appropriate
J1 thru J6 jumper respectively.
Attach input voltage (VIN) and input ground (GND) to Pin 1 and 2 of connector CN1 respectively.
Note VIN must be 4.75V < VIN < 25V.
Pin 3 of CN1 is used to synchronize the internal oscillator frequency of the MP1580 to an external
source. The synchronization rate can be vary from 380KHZ (normal operation) to 600KHz. There
is an internal 11KΩ pull down resistor to GND therefore leave this pin unconnected if unused.
Applying a voltage greater than 2.495V to pin 4 of CN1 enables the MP1580. Leave the input
unconnected if unused. 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 its needs
to be less than 0.7V.
CN1
1
2
3
4
GND
Sync
EN
VIN=4.75V to 25V
C1
CB
1
2
3
4
BS
IN
SW
GND
MP1580HS
U1
COMP
SYNC
EN
FB
8
7
6
5
www.monolithicpower.com
D1
CC
RC
CCA
L1
C4
J1
R1
1.22 V
Available Output Voltages (VOUT)
J2
R2A
Switch Mode Converter
1.5 V
2A MP1580 Step Down
J3
R2B
1.8 V
R2C
J4
EVALUATION BOARD
2.5 V
R2D
J5
3.3 V
EV0007
J6
R2E
5 V
GND
VOUT
External
Load
CN2
1
2
3
4
2