LTC4411 2.6A Low Loss TM Ideal Diode in ThinSOT FEATURES DESCRIPTIO TM Low Loss Replacement for PowerPath The LTC 4411 is an ideal diode IC, capable of supplying up ORing Diodes to 2.6A from an input voltage between 2.6V and 5.5V. The Small Regulated Forward Voltage (28mV) LTC4411 is housed in a 5-lead 1mm profile SOT-23 2.6A Maximum Forward Current package. Low Forward ON Resistance (140m Max) The LTC4411 contains a 140m P-channel MOSFET con- Low Reverse Leakage Current (<1A) necting IN to OUT. During normal forward operation, the 2.6V to 5.5V Operating Range drop across the MOSFET is regulated to as low as 28mV. Internal Current Limit Protection Quiescent current is less than 40A for load currents up to Internal Thermal Protection 100mA. If the output voltage exceeds the input voltage, the No External Active Components MOSFET is turned off and less than 1A of reverse current Pin-Compatible Monolithic Replacement flows from OUT to IN. Maximum forward current is limited for the LTC4412 to a constant 2.6A (typical) and internal thermal limiting cir- Low Quiescent Current (40A) cuits protect the part during fault conditions. Low-Profile (1mm) 5-lead SOT-23 Package An open-drain STAT pin indicates conduction status. The U STAT pin can be used to drive an auxiliary P-channel APPLICATIO S MOSFET power switch connecting an alternate power source when the LTC4411 is not conducting forward Cellular Phones current. Handheld Computers Digital Cameras An active-high control pin turns off the LTC4411 and USB Peripherals reduces current consumption to less than 25A. When Uninterrupted Supplies shut off, the LTC4411 indicates this condition with a low Logic Controlled Power Switch voltage on the status signal. , LTC and LT are registered trademarks of Linear Technology Corporation. ThinSOT and PowerPath are trademarks of Linear Technology Corporation. All other trademarks are the property of their respective owners. TYPICAL APPLICATIO LTC4411 vs Schottky Diode Forward Voltage Characteristics CONSTANT I ON WALL I OC TO ADAPTER I MAX LOAD LTC4411 INPUT V CC CONSTANT IN OUT SLOPE R ON LTC4411 1/R ON 4.7F GND 470k BATTERY I FWD STATUS OUTPUT CELL(S) IS LOW WHEN WALL CTL STAT ADAPTER IS SUPPLYING LOAD CURRENT CONSTANT 4411 F01 V ON SLOPE 1/R FWD Figure 1. Automatic Switchover of Load SCHOTTKY DIODE Between a Battery and a Wall Adapter LTC4411 FO1b FORWARD VOLTAGE (V) V FWD 4411fa 1 CURRENT (A) U ULTC4411 UUW ABSOLUTE AXI U RATI GS PACKAGE/ORDER I FOR ATIO (Note 1) ORDER PART IN, OUT, STAT, CTL Voltage .......................... 0.3 to 6V NUMBER Operating Ambient Temperature Range TOP VIEW (Note 2) ...............................................40C to 85C LTC4411ES5 IN 1 5 OUT Operating Junction Temperature GND 2 (Note 3) .............................................40C to 125C CTL 3 4 STAT S5 PART Storage Temperature Range ..................65C to 150C S5 PACKAGE MARKING Lead Temperature (Soldering, 10 sec).................. 300C 5-LEAD PLASTIC SOT-23 T = 125C, = 250C/W (Note 3) JMAX JA Continuous Power Dissipation LTAEN (Derate 10mW/C above 70C)...................... 500mW 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, otherwise specifications are at T = 25C. (Note 6) A SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS V , V Operating Supply Range 2.6 5.5 V IN OUT I Quiescent Current in Forward Regulation V = 3.6V, I = 100mA 40 A QF IN LOAD (Note 4) I Quiescent Current in Shutdown V = 3.6V, V = 0V, V > V 22 25 A Q(Off) IN STAT CTL IH I Quiescent Current While in Reverse V = 3.6V 1.3 1.8 2.3 A QRIN IN Turn-Off. Current Drawn from V V = 3.7V IN OUT I Quiescent Current While in Reverse V = 3.6V 14 17 23 A QROUT IN Turn-Off. Current Drawn from V V = 3.7V OUT OUT I V Current When V Supplies Power V = 0V, V = 5.5V 1 1 A LEAK IN OUT IN OUT V Forward Turn-On Voltage (V V)V = 3.6V 817 28 mV FWD IN OUT IN V Reverse Turn-Off Voltage (V V)V = 3.6V 4 5 14 mV RTO OUT IN IN R Forward ON Resistance, (V -V )/(I )V = 3.6V, 100mA < I < 500mA 100 140 m FWD IN OUT LOAD IN LOAD R ON Resistance in Constant R Mode V = 3.6V, I = 1000mA 140 245 m ON ON IN LOAD UVLO Undervoltage Lockout V Rising, 0C < T < 85C 2.5 V IN A V Rising 2.6 V IN V Falling 1.6 V IN STAT Output I STAT Pin Sink Current V = 3.6V, V > V + V , 7 11 18 A S(SNK) IN OUT IN RTO V > V + V CTL TH HYST I STAT Pin Off Current V = 3.6V, V < V V,1 1 A S(OFF) IN OUT IN FWD V < V V CTL TH HYST t STAT Pin Turn-On Time 1.2 1.4 s S(ON) t STAT Pin Turn-Off Time 1.1 1.25 s S(OFF) CTL Input V CTL Input Threshold Voltage V = (V + V )/2 390 460 530 mV TH TH IL IH V CTL Input Hysteresis V = (V V)90mV HYST HYST IH IL I CTL Input Pull-Down Current V < V = 3.6V, V = 1.5V 2 3.5 6 A CTL OUT IN CTL Short-Circuit Response I Current Limit V = 3.6V (Note 5) 1.8 2.6 A OC IN I Quiescent Current While in V = 3.6V, I = 1.8A 575 1100 A QOC IN OUT Overcurrent Operation 4411fa 2 U WWW