LTC2920-1/LTC2920-2 Single/Dual Power Supply Margining Controller FEATURES DESCRIPTIO Margin Voltage Precision <0.4% The LTC 2920 allows power supplies and power supply 400:1 Current Programming Range module output voltages to be precisely adjusted both up Symmetric/Asymmetric High and Low Voltage and down for automated PCB testing. The power supply Margining output voltage is changed by sourcing or sinking current Single Control Pin per SupplyHigh, Float, Low into the feedback node or voltage adjust pin of the power Single Current Setting Resistor per Supply supply. This allows a system to test the correct operation Wide V Compliance 2.3V < V < 6V of electrical components at the upper and/or lower power CC CC Wide Output Compliance supply voltage limits specified for a given design (Power 0.6V < V < (V 0.6V) Supply Margining). MARGIN CC TM Single in 5-Pin ThinSOT (LTC2920-1) The LTC2920 uses a single resistor to set the voltage Dual in 8-Pin MSOP (LTC2920-2) margining current. The margining current is adjustable over a 400:1 range. Precision margin currents can be U supplied to within 0.6V of ground or V . CC APPLICATIO S The LTC2920-1 is a single margining controller. The Automated PCB Production Testing LTC2920-2 has two independently controllable margining Automated Preventative Maintenance Testing channels. Each channel has its own control pin and current DC/DC Converter Module Margining setting resistor. The LTC2920-2 can be used to symmetri- cally margin two power supplies, or asymmetrically mar- gin a single power supply. Both the LTC2920-1 and LTC2920-2 feature a trimmed on- board voltage reference. Typical power supply margining accuracy is better than 0.4%. , LTC and LT are registered trademarks of Linear Technology Corporation. ThinSOT is a trademark of Linear Technology Corporation. All other trademarks are the property of their respective owners. TYPICAL APPLICATIO 3.3V Quarter Brick with 5% Voltage Margining 1 5 3.3V +V +V IN OUT AT 4A 5% 150 0.1F + POWER ONE 2F SYSTEM +V I5S013ZE-A NOM OUT CONTROLLER + 33F V THREE-STATE CC IN1 I LTC2920-1 TRIM M1 5% R GND S1 LOGIC HI R SET1 10k IN1 1% 6 LOGIC FLOAT V OUT LOGIC LOW 2 7 V 48V IN 2920-1/2 TA01 1ms/DIV 2920-1/2 TA01a 292012fa 1 U ULTC2920-1/LTC2920-2 ABSOLUTE AXI U RATI GS (Note 1) Supply Voltage (V ) ................................0.3V to 6.5V Operating Temperature Range CC Input Voltages LTC2920-1C/LTC2920-2C ....................... 0C to 70C (IN1, IN2, R , R )................. 0.3V to (V + 0.3V) LTC2920-1I/LTC2920-2I .................... 40C to 85C S1 S2 CC Output Voltages (I , I ) ........... 0.3V to (V + 0.3V) Storage Temperature Range ................. 65C to 150C M1 M2 CC Lead Temperature (Soldering, 10 sec).................. 300C UUW PACKAGE/ORDER I FOR ATIO ORDER PART NUMBER ORDER PART NUMBER TOP VIEW TOP VIEW LTC2920-1CS5 LTC2920-2CMS8 V 1 5 IN1 R 1 8 V CC S2 CC LTC2920-1IS5 LTC2920-2IMS8 IN2 2 7 I M2 GND 2 IN1 3 6 GND I 3 4 R R 4 5 I M1 S1 M1 S1 S5 PART MARKING MS8 PART MARKING MS8 PACKAGE S5 PACKAGE 8-LEAD PLASTIC MSOP 5-LEAD PLASTIC SOT-23 LTD7 LTB6 T = 125C, = 200C/W T = 125C, = 250C/W JMAX JA JMAX JA LTD8 LTA4 Consult LTC Marketing for parts specified with wider operating temperature ranges. ELECTRICAL CHARACTERISTICS The denotes the specifications which apply over the full operating temperature range, C = C = 20pF, otherwise specifications are at T = 25C. RS1 RS2 A SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS Supplies V Supply Operating Range (Note 2) 2.3 6 V CC I Supply Current while Sourcing Max I R = R = 15k, 6mA CC(SOURCE) IM SET1 SET2 IN1 = IN2 < V IL I Quiescent Supply Current R = R = 200k, 0.23 1 mA CC(Q) SET1 SET2 IN1 = IN2 V IL Current Margining Outputs I , I M1 M2 I Low Range I Current R , R Tied to GND, 5 167 A IMLOW MARGIN SET1 SET2 Sourcing or Sinking IN1, IN2 > V or IN1, IN2 < V , (Note 4) IH IL I High Range I Current R , R Tied to V , 0.15 2 mA IMHIGH MARGIN SET1 SET2 CC Sourcing or Sinking IN1, IN2 > V or IN1, IN2 < V , (Note 4) IH IL V I , I Output Voltage Compliance (Note 3) 0.55 V 0.55 V M M1 M2 CC 292012fa 2 U WWW