MIC68200 Evaluation Board 2A Sequencing LDO with Tracking and Ramp Control™ General Description Features The MIC68200 Evaluation Board contains a MIC68200 chip with built-in resistor dividers, delay and ramp capacitors, and programmable jumpers to allow a variety of Master/Slave configurations including sequencing, tracking, and ratiometric tracking. • • • • • • • • • Stable with 4.7uF ceramic capacitor Input voltage range: 1.65V to 5.5V Adjustable output voltage down to 0.5V 2A maximum output current – peak start up 1A Continuous Operating Current Tracking on turn-on and turn-off Timing Controlled Sequencing Programmable Ramp Control™ Power-on Reset (POR) supervisor with programmable delay time Master and Slave devices included Tiny 10-pin 3mm x 3mm MLF® package The MIC68200 operates from a wide input range of 1.65V to 5.5V. The MIC68200 incorporates a delay pin (Delay) for control of power on reset output (POR) at turn-on and power-down delay at turn-off. In addition there is a ramp control pin (RC) for either tracking applications or output voltage slew rate • adjustment at turn-on and turn-off. On board jumpers • allow selection of on board delay caps, tracking, or sequencing mode. _____________________________________________________________________________________________ Terminal Description PCB Connections Terminal Name Terminal Function J1 VIN1 VIN1 J2 POR1 Power On Reset1 (Power Good Flag) J3 GND GND J4 VIN2 VIN2 J5 POR2 Power On Reset2 (Power Good Flag) J6 GND GND J7 VOUT1 J8 GND J9 VOUT2 J10 GND Output – Device 1 GND Output – Device 2 GND MLF and MicroLeadFrame are registered trademarks of Amkor Technology, Inc. Micrel Inc. • 2180 Fortune Drive • San Jose, CA 95131 • USA • tel +1 (408) 944-0800 • fax + 1 (408) 474-1000 • http://www.micrel.com February 2007 M9999-020807 (408) 955-1690 Micrel, Inc. MIC68200 Schematic Programming Jumpers Jumper Number Jumper Name Jumper Function JP1 POR1 Source [1:2] – Use VIN1; JP2 EN1 Source JP3 Delay1 Source JP4 RC1 Source JP5 U1 Adj Voltage Select JP6 POR2 Source JP7 EN2 Source JP8 Delay2 Source JP9 RC2 Source JP10 U2 Adj Voltage Select February 2007 [2:3] – Use VO1 (min Q Current) [1:2] – Use VIN1 (Fastest Turn-On); [2:3] – Use POR2 (Sequencing) [1:2] – Use C3 (on board delay); [2:3] – NC (min delay) [1:2] – Use C4 (on board ramp slope); [2:3] – Use VO2 (Tracking) [1:2] – 1.5V [3:4] – 1.8V [5:6] – 2.5V No Jumper – 0.5V [7:8] – 3.3V [1:2] – Use VO2 (min Q Current); [2:3] – Use VIN2 [1:2] – Use VIN2 (Fastest Turn-On); [2:3] – Use POR1 (Sequencing) [1:2] – NC (min delay); [2:3] – Use C7 (on board delay) [1:2] – Use C8 (on board ramp slope); [1:2] – 1.2V [2:3] – Use VO1 (Tracking) [3:4] – 1.5V [5:6] – 1.8V No Jumper – 0.5V 2 [7:8] – 2.5V M9999-020807 (408) 955-1690 Micrel, Inc. MIC68200 Ordering Information Part Number MIC68200YML EV Description Evaluation board with MIC68200YML adjustable device. NOTE: For additional voltage options, contact Micrel Marketing. February 2007 3 M9999-020807 (408) 955-1690 Micrel, Inc. MIC68200 Applications Information Typical Jumper Connections Enable Input VIN1 & VIN2 J1 & J4 JP1 JP2 JP3 JP4 JP5 JP6 JP7 JP8 JP9 JP10 Description POR 1 EN 1 DLY 1 RC 1 VO 1 POR 2 EN 2 DLY 2 RC 2 VO 2 Delayed Sequencing: U1 Slave w/ VOUT = 1.8V U2 Master w/ VOUT = 2.5V JP7.2 3.3V 1:2 2:3 1:2 NC 3:4 2:3 EXT 2:3 NC 7:8 Windowed Sequencing: U1 Master w/ VOUT = 2.5V U2 Slave w/ VOUT = 1.8V JP2.2 3.3V 1:2 EXT 1:2 NC 5:6 2:3 2:3 2:3 NC 5:6 Normal Tracking: U1 Master w/ VOUT = 2.5 V U2 Slave w/ VOUT = 1.8V JP2.2 & JP7.2 3.3V 1:2 EXT 1:2 1:2 5:6 2:3 EXT 1:2 2:3 5:6 Ratiometric Tracking: U1 Master w/ VOUT = 2.5 V U2 Slave w/ VOUT = 1.8V JP2.2 & JP7.2 1:2 EXT 1:2 1:2 * 5:6 2:3 EXT 1:2 1:2 * 5:6 3.3V February 2007 External jumper between JP4.2 and JP9.2 Delayed Sequencing Windowed Sequencing Normal Tracking Ratiometric Tracking 4 M9999-020807 (408) 955-1690 Micrel, Inc. MIC68200 R from device pin 8 to GND is: Enable Input The enable inputs are programmed via JP2 (U1) and JP7 (U2). Either device may be enabled 3 ways: 1. From VIN (short pins 1 & 2), 2. From POR of adjacent device (short pins 2 & 3) 3. From External source (drive pin 2) Voltage Adjustment Target voltage for U1 is controlled via JP5. Jumper settings are: 1. Pins 1&2 – 1.5V 2. Pins 3&4 – 1.8V 3. Pins 5&6 – 2.5V 4. Pins 7&8 – 3.3V Target voltage for U2 is controlled via JP10. Jumper settings are: 1. Pins 1&2 – 1.2V 2. Pins 3&4 – 1.5V 3. Pins 5&6 – 1.8V 4. Pins 7&8 – 2.5V Other voltages are possible by changing resistor values or adding a resistance from U1.8 or U2.8 to GND. The formula for output voltage given resistance February 2007 ⎛ ⎛ 10k ⎞ ⎞ VOUT = 0.5 × ⎜⎜1 + ⎜ ⎟ ⎟⎟ ⎝ ⎝ R ⎠⎠ NOTE: if U1 or U2 is replaced by a fixed device, R2 (for U1) or R10 (for U2) should be shorted or replaced with a low value resistor (1 Ohm). Power on Reset (POR) POR may be observed via J2 (for U1) or J5 (for U2). Jumpers JP1 (for U1) or JP6 (for U2) allow the POR pullup resistor to be supplied from either VIN or VOUT. Delay Programming The Delay is programmed via JP3 (for U1) or JP8 (for U2). For U1 and U2, delay can be either minimum (Open, or Pins 1&2 shorted) or approximately 1mSec for U1 and 2mSec for U2 (Pins 2&3 shorted). Ramp Control Ramp Control and Tracking is programmed via JP4 (for U1) or JP9 (for U2). Shorting Pins 1&2 sets the output turn-on slew time (time from turn on to full output) to approximately 0.5mSec for U1 or 1.0mSec for U2. Shorting Pins 2&3 of JP4 causes U1 to track U2. Shorting Pins 2&3 of JP9 causes U2 to track U1. 5 M9999-020807 (408) 955-1690 Micrel, Inc. MIC68200 Bill of Materials Item Part Number Manufacturer Description C1, C5 JMK107 BJ106MA Taiyo Yuden 10µF/6.3V X5R C1608 X5R 0J 106M TDK 08056D106KAT AVX C2, C6 GRM21BR61A106KE19L muRATA C1608 X5R 0J 475M TDK 08056D475MAT AVX Qty. 2 10µF/10V X5R 4.7uF/6.3V X5R 2 GRM188R60J475KE19D muRATA C3 VJ0603A102KXQPW1BC Vitramon 1nF/25V 1 C7,C4, C8 VJ0603Y222KXXCW1BC Vitramon 2.2nF/25V 3 R1, R9, R2, R10 CRCW06031002FKEYE3 Vishay Dale 10K , 0603, 1/16W, 1% 4 R2 CRCW06030000FKEYE3 Vishay Dale Fix Output Voltage: 0 ohm, 0603, 1/16W, 1%; R3-R6 and R11-R14 Open 1 R3, R12 CRCW06034991FKEYE3 Vishay Dale 4.99K , 0603, 1/16W, 1% 2 R4, R13 CRCW06033831FKEYE3 Vishay Dale 3.83K , 0603, 1/16W, 1% 2 R5, R14 CRCW06032491FKEYE3 Vishay Dale 2.49K , 0603, 1/16W, 1% 2 R6 CRCW06031781FKEYE3 Vishay Dale 1.78K , 0603, 1/16W, 1% 1 R7 CRCW0603249RFKEYE3 Vishay Dale 249 , 0603, 1/16W, 1% 1 R8, R16 CRCW06031001FKEYE3 Vishay Dale 1.0K , 0603, 1/16W, 1% 2 R11 CRCW06037151FKEYE3 Vishay Dale 7.15K , 0603, 1/16W, 1% 1 R15 CRCW06033830FKEYE3 Vishay Dale 383 , 0603, 1/16W, 1% 1 U1, U2 MIC68200YML Micrel, Inc. 2A Sequencing LDO with Tracking and Ramp Control 1 Note: 1. AVX: www.avx.com 2. Murata: www.murata.com 3. TDK: www.tdk.com 4. Vishay: www.vishay.com 5. Vitramon: www.vitramon.com 6. TaiyoYuden: www.t-yuden.com 7. Micrel Semiconductor: www.micrel.com February 2007 6 M9999-020807 (408) 955-1690 Micrel, Inc. MIC68200 PCB Layout Artwork TOP February 2007 BOTTOM 7 M9999-020807 (408) 955-1690 Micrel, Inc. MIC68200 MICREL, INC. 2180 FORTUNE DRIVE SAN JOSE, CA 95131 USA TEL +1 (408) 944-0800 FAX +1 (408) 474-1000 WEB http:/www.micrel.com The information furnished by Micrel in this data sheet is believed to be accurate and reliable. However, no responsibility is assumed by Micrel for its use. Micrel reserves the right to change circuitry and specifications at any time without notification to the customer. Micrel Products are not designed or authorized for use as components in life support appliances, devices or systems where malfunction of a product can reasonably be expected to result in personal injury. Life support devices or systems are devices or systems that (a) are intended for surgical implant into the body or (b) support or sustain life, and whose failure to perform can be reasonably expected to result in a significant injury to the user. A Purchaser’s use or sale of Micrel Products for use in life support appliances, devices or systems is a Purchaser’s own risk and Purchaser agrees to fully indemnify Micrel for any damages resulting from such use or sale. © 2007 Micrel, Incorporated. February 2007 8 M9999-020807 (408) 955-1690