EV0007 MPS | Alldatasheet
Document overview
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Technical content
The EV0007 is a 2A evaluation boa rd based on the MP1580 DC to DC Converter. The MP1580 is a monolithic ste p down switch mod e converter with a bu ilt in inter nal Power MOSFET. It achieves 2A contin uous outpu t current over a wide input supply range with excellent load and line regulation. Current mo de operation provides f ast transient response a nd eases loop stabilization. Fault condition p rotection includes cy cle-by-cycle current limiting and thermal shutdown. In shutdown mode the regulator dr aws 23µA of supply current. The MP158 0 requires a minimu m number of readily available standard external components. A synchron ization pin allows the part to be driven to 600KHz.
Ordering Information
Board Number MPS IC Number EV0007 MP1580HS ∗ For Tape & Reel use suffix - Z (e.g. MP1580HS-Z) Absolute Maximum Ratings Supply Voltage (VVIN) 28V Switch Voltage (VSW) -1V to VIN +1V Boost Voltage VSW + 6V Feedback Voltage (VFB) –0.3 to 6V EN/UVLO Voltage (VEN) –0.3 to 6V COMP Voltage (VCOMP) –0.3 to 6V Sync Voltage (VSync) –0.3 to 6V Recommended Operating Conditions Input Voltage VVIN 4.75V to 25V Figure 1: EV0007 Evaluation Board EV0007 Rev 1.5_08/14/02 www.monolithicpower.com 1
Figure 2: EV0007 Schematic Sync L1 5 V R2ER2A RC MP1580HS 4 5 8BS IN SW GND FB COMP EN SYNC EN CC R2D VIN=4.75V to 25V CN2 1.8 V C4 J6 1.22 V CB 3.3 V 2.5 V CN1 1.5 V R2B CCA J4 D1 R2C GND VOUT GND Available Output Voltages (VOUT) External Power Supply - + External Load 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) Attach positive end of load to pin 1 = 2 and negative end of load to pin 3 = 4 of connector CN2. J1 thru J6 jumper respectively. 3) 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. 4) 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. 5) 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. EV0007 Rev 1.5_08/14/02 www.monolithicpower.com 2
Table 1: EV0007 Bill of Materials # Qty Reference Part Number 1 1 U1 MP1580HS 2 2 CN1, CN2 4 Pin Connector 3 1 CB 10nF 0603 4 1 CC 22nF 0603 5 1 CCA 100pF 0603 6 1 C1 10µF 25V 1210 7 1 C4 22µF 10V Y5V 1210 8 1 D1 B230/SM 2A 30V Schottky 9 1 L1 22µH 10 2 RC, R1 10KΩ 1% 11 1 R2A 2.32K 1% 12 1 R2B 4.75K 1% 13 1 R2C 10.5K 1% 14 1 R2D 16.9K 1% 15 1 R2E 30.9K 1% T able 2. Recommended components for standard output voltages VOUT Jumper Connection L1 minimum RC 1.22V J1 6.8µH 4.7KΩ 1.5V J2 6.8µH 4.7KΩ 1.8V J3 10µH 4.7KΩ 2.5V J4 10µH 10KΩ 3.3V J5 15µH 10KΩ 5.0V J6 22µH 10KΩ EV0007 Rev 1.5_08/14/02 www.monolithicpower.com 3
Figure 3: EV0007 Layout NOTICE: MPS be lieves th e informati on in this d ocument to b e acc urate a nd r eliable. Ho wever, it i s subj ect to c hange without notice. Please contact the factory for current specifications. No responsibility is assumed by MPS for its use or fit to any application, nor for infringement of patent or other rights of third parties. EV0007 Rev 1.5 Monolithic Power Systems, Inc. 4 08/14/02 983 University Ave, Building D, Los Gatos, CA 95032 USA © 2002 MPS, Inc. Tel: 408-395-2802 ♦ Fax: 408-395-2812 ♦ Web: www.monolithicpower.com