LTC2950CTS8-2-TRMPBF

LTC2950-1/LTC2950-2 Push Button On/Off Controller FEATURES ■ ■ ■ ■ DESCRIPTION The LTC®2950 is a micropower, wide input voltage range, push button ON/OFF controller. The part contains a push button input with independently programmable ON and OFF debounce times that control the toggling of an open drain enable output. The part also contains a simple microprocessor interface to allow for proper system housekeeping prior to power down. Under system fault conditions, an internal KILL timer ensures proper power down. The LTC2950 operates over a wide 2.7V to 26V input voltage range to accommodate a wide variety of input power supplies. Very low quiescent current (6μA typical) makes the LTC2950 ideally suited for battery powered applications. Two versions of the part are available to accommodate either positive or negative enable polarities. The parts are available in either 8-lead 3mm × 2mm DFN or ThinSOT packages. L, LT, LTC and LTM 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. ■ ■ ■ ■ ■ ■ Adjustable Push Button On/Off Timers Low Supply Current: 6μA Wide Operating Voltage Range: 2.7V to 26V EN Output (LTC2950-1) Allows DC/DC Converter Control EN Output (LTC2950-2) Allows Circuit Breaker Control Simple Interface Allows Graceful μP Shut Down High Input Voltage PB Pin with Internal Pull Up Resistor ±10kV ESD HBM on PB Input Accurate 0.6V Threshold on KILL Comparator Input 8-Pin 3mm × 2mm DFN and ThinSOTTM Packages APPLICATIONS ■ ■ ■ ■ Portable Instrumentation Meters Blade Servers Portable Customer Service PDA Desktop and Notebook Computers TYPICAL APPLICATION VIN 3V – 26V Turn On Debounce VIN VOUT DC/DC BUCK SHDN EN R1 10k INT μP/μC KILL 2950 TA01 VIN LTC2950-1 PB GND ONT CONT* 0.033μF EN INT KILL OFFT COFFT* 0.033μF 2V/DIV PB 10ms/DIV *OPTIONAL 2950 TA01b 295012fb 1 LTC2950-1/LTC2950-2 ABSOLUTE MAXIMUM RATINGS (Note 1) Supply Voltage (VIN) ..................................– 0.3V to 33V Input Voltages PB ............................................................– 6V to 33V ONT ......................................................– 0.3V to 2.7V OFFT......................................................– 0.3V to 2.7V KILL .........................................................– 0.3V to 7V Output Voltages INT .........................................................– 0.3V to 10V EN/EN ....................................................– 0.3V to 10V Operating Temperature Range LTC2950-C1 .............................................. 0°C to 70°C LTC2950-C2 .............................................. 0°C to 70°C LTC2950-I1 .......................................... – 40°C to 85°C LTC2950-I2 .......................................... – 40°C to 85°C Storage Temperature Range DFN Package..................................... – 65°C to 125°C TSOT-23 ............................................ – 65°C to 150°C Lead Temperature (Soldering, 10 sec) .................. 300°C PIN CONFIGURATION TOP VIEW GND 1 ONT 2 PB 3 VIN 4 9 8 7 6 5 INT EN/EN OFFT KILL VIN 1 PB 2 ONT 3 GND 4 TOP VIEW 8 KILL 7 OFFT 6 EN/EN 5 INT DDB8 PACKAGE 8-LEAD (3mm 2mm) PLASTIC DFN TJMAX = 125°C, θJA = 165°C/W EXPOSED PAD (PIN 9) UNCONNECTED TS8 PACKAGE 8-LEAD PLASTIC TSOT-23 TJMAX = 125°C, θJA = 140°C/W ORDER INFORMATION Lead Free Finish TAPE AND REEL (MINI) TAPE AND REEL PART MARKING* PACKAGE DESCRIPTION TEMPERATURE RANGE 0°C to 70°C 0°C to 70°C –40°C to 85°C –40°C to 85°C 0°C to 70°C 0°C to 70°C –40°C to 85°C –40°C to 85°C LTC2950CDDB-1#TRMPBF LTC2950CDDB-1#TRPBF LBKP 8-Lead Plastic DFN LTC2950CDDB-2#TRMPBF LTC2950CDDB-2#TRPBF LBNG 8-Lead Plastic DFN LTC295ICDDB-1#TRMPBF LTC295ICDDB-1#TRPBF LBKP 8-Lead Plastic DFN LTC295ICDDB-2#TRMPBF LTC295ICDDB-2#TRPBF LBNG 8-Lead Plastic DFN LTC2950CTS8-1#TRMPBF LTC2950CTS8-1#TRPBF LTBKN 8-Lead Plastic TSOT-23 LTC2950CTS8-2#TRMPBF LTC2950CTS8-2#TRPBF LTBNF 8-Lead Plastic TSOT-23 LTC2950ITS8-1#TRMPBF LTC2950ITS8-1#TRPBF LTBKN 8-Lead Plastic TSOT-23 LTC2950ITS8-2#TRMPBF LTC2950ITS8-2#TRPBF LTBNF 8-Lead Plastic TSOT-23 TRM = 500 pieces. *Temperature grades are identified by a label on the shipping container. Consult LTC Marketing for parts specified with wider operating temperature ranges. Consult LTC Marketing for information on lead based finish parts. For more information on lead free part marking, go to: http://www.linear.com/leadfree/ For more information on tape and reel specifications, go to: http://www.linear.com/tapeandreel/ 295012fb 2 LTC2950-1/LTC2950-2 ELECTRICAL CHARACTERISTICS SYMBOL VIN IIN VUVL VUVL(HYST) PARAMETER Supply Voltage Range VIN Supply Current VIN Undervoltage Lockout The ● denotes the specifications which apply over the full operating temperature range, otherwise specifications are at TA = 25C. VIN = 2.7V to 26.4V, unless otherwise noted. (Note 2) CONDITIONS Steady State Operation System Power On, VIN = 2.7V to 24V VIN Falling ● ● ● MIN 2.7 TYP 6 MAX 26.4 12 2.4 600 UNITS V μA V mV 2.2 50 2.3 300 VIN Undervoltage Lockout Hysteresis Push Button Pin (PB) VPB(MIN, MAX) IPB PB Voltage Range PB Input Current Single-Ended 2.5V < VPB < 26.4V VPB = 1V VPB = 0.6V PB Falling IPB = – 1μA VONT, OFFT = 0V VONT, OFFT = 1.3V ONT Pin Float, PB Falling → Enable Asserted OFFT Pin Float, PB Falling → INT Falling ● ● ● ● ● ● ● ● ● ● ● –1 –1 –3 0.6 1 –2.4 2.4 26 9 26 9 –6 –9 0.8 1.6 –3 3 32 11.5 32 11.5 26.4 ±1 –12 –15 1 2 –3.6 3.6 41 13.5 41 13.5 ±1 0.11 0.4 0.63 50 ±0.1 V μA μA μA V V μA μA ms ms ms ms μA V V mV μA μs μs ms ms ms μA V VPB(VTH) VPB(VOC) IONT, OFFT(PU) IONT, OFFT(PD) tDB, On tONT tDB, Off tOFFT IINT(LKG) VINT(VOL) VKILL(TH) VKILL(HYST) IKILL(LKG) tKILL(PW) tKILL(PD) tKILL, On Blank tKILL, Off Delay tEN/EN, Lock Out IEN/EN(LKG) VEN/EN(VOL) PB Input Threshold PB Open Circuit Voltage ONT/OFFT Pull Up Current ONT/OFFT Pull Down Current Internal Turn On Debounce Time Internal Turn Off Debounce Time Debounce Timing Pins (ONT, OFFT) Additional Adjustable Turn On Time CONT = 1500pF Additional Adjustable Turn Off Time COFFT = 1500pF INT Leakage Current INT Output Voltage Low KILL Input Threshold Voltage KILL Input Threshold Hysteresis KILL Leakage Current KILL Minimum Pulse Width KILL Propagation Delay KILL Turn On Blanking (Note 3) KILL Turn Off Delay (Note 4) EN/EN Lock Out Time (Note 5) EN/EN Leakage Current EN/EN Voltage Output Low KILL Falling → Enable Released KILL = Low, Enable Asserted → Enable Released KILL = High, INT Asserted → Enable Released Enable Released → Enable Asserted VEN/ EN = 1V, Sink Current Off IEN/ EN = 3mA VKILL = 0.6V VINT = 3V IINT = 3mA KILL Falling μP Handshake Pins (INT, KILL) ● ● ● 0.57 10 0.6 30 ● ● ● ● ● ● ● 30 30 400 800 200 512 1024 256 0.11 650 1300 325 ±0.1 0.4 Note 1: Stresses beyond those listed under Absolute Maximum Ratings may cause permanent damage to the device. Exposure to any Absolute Maximum Rating condition for extended periods may affect device reliability and lifetime. Note 2: All currents into pins are positive; all voltages are referenced to GND unless otherwise noted. Note 3: The KILL turn on blanking timer period is the waiting period immediately after the enable output is asserted. This blanking time allows sufficient time for the DC/DC converter and the μP to perform power up tasks. The KILL and PB inputs are ignored during this period. If KILL remains low at the end of this time period, the enable output is released, thus turning off system power. This time delay does not include tDB, ON or tONT. Note 4: The KILL turn off delay is the maximum delay from the initiation of a shutdown sequence (INT falling), to the release of the enable output. If the KILL input switches low at any time during this period, enable is released, thus turning off system power. This time is internally fixed at 1024ms. This time delay does not include tDB, OFF or tOFFT. Note 5: The enable lock out time is designed to allow an application to properly power down such that the next power up sequence starts from a consistent powered down configuration. PB is ignored during this lock out time. This time delay does not include tDB, ON or tONT. 295012fb 3 LTC2950-1/LTC2950-2 TYPICAL PERFORMANCE CHARACTERISTICS Supply Current vs Temperature 10 VIN = 26.4V 8 VIN = 3.3V VIN = 2.7V 4 IVIN (μA) 8 10 Supply Current vs Supply Voltage TA = 25°C 50 Internal Default Turn On Debounce Time (tDB, ON) vs VIN TA = 25°C 40 tDB, ON (ms) IVIN (μA) 6 6 30 4 20 2 2 10 0 –50 –25 0 25 50 TEMPERATURE (°C) 75 100 2950 G01 0 0 5 10 15 VIN (V) 20 25 30 2950 G02 0 0 5 10 15 VIN (V) 20 25 30 2950 G03 Turn On Debounce Time (tDB, ON + tONT) vs ONT External Capacitor 10000 ONT PULL-DOWN CURRENT (μA) TA = 25°C VIN = 3.3V –3.4 ONT Pull-Down Current vs Temperature 50 Internal Default Turn Off Debounce Time (tDB, OFF) vs VIN TA = 25°C 40 –3.2 VIN = 26.4V –3.0 VIN = 2.7V –2.8 tDB, OFF (ms) 75 100 2950 G05 tDB, ON + tONT (ms) 1000 30 20 100 10 10 1 100 10 ONT EXTERNAL CAPACITOR (nF) 1000 2950 G04 –2.6 –50 –25 0 25 50 TEMPERATURE (°C) 0 0 5 10 15 VIN (V) 20 25 30 2950 G06 Turn Off Debounce Time (tDB, OFF + tOFFT) vs OFFT External Capacitor 10000 OFFT PULL-DOWN CURRENT (μA) TA = 25°C VIN = 3.3V tDB, OFF + tOFFT (ms) –3.4 OFFT Pull-Down Current vs Temperature –250 PB Current vs PB Voltage TA = 25°C VIN = 3.3V –3.2 VIN = 26.4V –3.0 VIN = 2.7V –2.8 PB CURRENT (μA) 75 100 2950 G08 –200 1000 –150 –100 100 –50 10 1 100 10 OFFT EXTERNAL CAPACITOR (nF) 1000 2950 G07 –2.6 –50 –25 0 25 50 TEMPERATURE (°C) 0 –10 –5 0 5 10 15 PB VOLTAGE (V) 20 25 30 2950 G09 295012fb 4 LTC2950-1/LTC2950-2 TYPICAL PERFORMANCE CHARACTERISTICS PB Voltage vs External PB Resistance to Ground 300 VIN = 3.3V 250 200 150 100 50 0 0 5 10 15 20 EXTERNAL PB RESISTANCE TO GROUND (kΩ) 2950 G10 EN/EN VOL vs Current Load 500 TA = 25°C VIN = 3.3V 400 EN/EN VOLTAGE (mV) PB VOLTAGE (mV) TA = 100°C TA = 25°C TA = –45°C 300 200 100 0 0 2 6 8 4 EN/EN CURRENT LOAD (mA) 10 2950 G11 EN (LTC2950-1) Voltage vs VIN 1.0 TA = 25°C 100k PULL-UP FROM EN TO VIN 4 EN (LTC2950-2) Voltage vs VIN TA = 25°C 100k PULL-UP FROM EN TO VIN 3 0.8 EN (V) EN (V) 0 2 VIN (V) 2950 G12 0.6 2 0.4 1 0.2 0 1 3 4 0 0 1 2 VIN (V) 3 4 2950 G13 295012fb 5 LTC2950-1/LTC2950-2 PIN FUNCTIONS (TSOT-23/DFN) EN (LTC2950-2, Pin 6/Pin 7): Open Drain Enable Output. This pin is intended to enable system power. EN is asserted low after a valid PB turn-on event. EN releases high if: a) KILL is not driven high (by μP) within 512ms of the initial valid PB power turn-on event, b) KILL is driven low during normal operation, c) a second valid PB event (power turn-off) is detected. The operating range of this pin is 0V to 10V. OFFT (Pin 7/Pin 6): Additional Adjustable Turn Off Time Input. A capacitor to ground determines the additional time (beyond the internal default 32ms) that the PB pin must be held low before initiating a power down sequence (INT falling). Floating this pin results in a default turn off time of 32ms. KILL (Pin 8/Pin 5): KILL Input. Forcing KILL low releases the enable output. During system turn on, this pin is blanked by a 512ms internal timer to allow the system to pull KILL high. This pin has an accurate 0.6V threshold and can be used as a voltage monitor input. Exposed Pad (Pin 9): Exposed Pad may be left open or connected to device ground. VIN (Pin 1/Pin 4): Power Supply Input: 2.7V to 26.4V. PB (Pin 2/Pin 3): Push Button Input. Connecting PB to ground through a momentary switch provides on/off control via the EN/EN pin. An internal 100k pull-up resistor connects to an internal 1.9V bias voltage. The rugged PB input can be pulled up to 26.4V externally without consuming extra current. ONT (Pin 3/Pin 2): Additional Adjustable Turn On Time Input. Placing an external capacitor to ground determines the additional time (beyond the internal default 32ms) the PB pin must be held low before the enable output is asserted. Floating this pin results in a default turn on debounce time of 32ms. GND (Pin 4/Pin 1): Device Ground. INT (Pin 5/Pin 8): Open Drain Interrupt Output. After a push button turn-off event is detected, the LTC2950 interrupts the system (μP) by bringing the INT pin low. Once the system finishes its power down and housekeeping tasks, it sets KILL low, which in turn releases the enable output. If at the end of the power down timer (1024ms) KILL is still high, the enable output is released immediately. INT may optionally be tied to KILL to release the enable output immediately after the turn-off event has been detected (INT = low). EN (LTC2950-1, Pin 6/Pin 7): Open Drain Enable Output. This pin is intended to enable system power. EN is asserted high after a valid PB turn on event. EN is released low if: a) KILL is not driven high (by μP) within 512ms of the initial valid PB power turn-on event, b) KILL is driven low during normal operation, c) a second valid PB event (power turn-off) is detected. The operating range for this pin is 0V to 10V. 295012fb 6 LTC2950-1/LTC2950-2 BLOCK DIAGRAMS EN/EN VIN 2.7V TO 26.4V 2.4V REGULATOR 2.4V OSCILLATOR 100k PB DEBOUNCE 0.8V OSCILLATOR INT LOGIC 0.6V KILL GND 2950 BD ONT OFFT TIMING DIAGRAMS tKILL(PW) KILL tKILL(PD) EN/EN 2950 TD01 295012fb 7 LTC2950-1/LTC2950-2 TIMING DIAGRAMS PB tDB, ON tONT PB & KILL IGNORED tKILL, ON BLANK 16 CYCLES EN (LTC2950-1) EN (LTC2950-2) 2950 TD02 Power On Timing PB tDB, OFF tOFFT PB IGNORED OFFT 16 CYCLES INT tKILL, OFF DELAY EN (LTC2950-1) EN (LTC2950-2) 2950 TD03 Power Off Timing, KILL > 0.6V 295012fb 8 LTC2950-1/LTC2950-2 APPLICATIONS INFORMATION Description The LTC2950 is a low power (6μA), wide input voltage range (2.7V to 26.4V), push button on/off controller that can interface to a μP and a power supply. The turn-on and turn-off debounce times are extendable using optional external capacitors. A simple interface (INT output, KILL input) allows a system to power on and power off in a controlled manner. Turn On When power is first applied to the LTC2950, the part initializes the output pins. Any DC/DC converters connected to the EN/EN pin will therefore be held off. To assert the enable output, PB must be held low for a minimum of 32ms (tDB, ON). The LTC2950 provides additional turn on debounce time via an optional capacitor connected to the ONT pin (tONT). The following equation describes the additional time that PB must be held low before asserting the enable output. CONT is the ONT external capacitor: CONT = 1.56E-4 [μF/ms] • (tONT – 1ms) Once the enable output is asserted, any DC/DC converters connected to this pin are turned on. The KILL input from the μP is ignored during a succeeding 512ms blanking time (tKILL, ON BLANK). This blanking time represents the maximum time required to power up the DC/DC converter and the μP . If KILL is not brought high during this 512ms time window, the enable output is released. The assumption is that 512ms is sufficient time for the system to power up. Turn Off To initiate a power off sequence, PB must be held low for a minimum of 32ms (tDB, OFF). Additional turn off debounce time may be added via an optional capacitor connected to the OFFT pin (tOFFT). The following equation describes the additional time that PB must be held low to initiate a power off sequence. COFFT is the OFFT external capacitor: COFFT = 1.56E-4 [μF/ms] • (tOFFT – 1ms) Once PB has been validly pressed, INT is switched low. This alerts the μP to perform its power down and housekeeping tasks. The power down time given to the μP is 1024ms. Note that the KILL input can be pulled low (thereby releasing the enable output) at any time after tKILL, ON BLANK period. Simplified Power On/Off Sequence Figure 1 shows a simplified LTC2950-1 power on and power off sequence. A high to low transition on PB (t1) initiates the power on sequence. This diagram does not show any bounce on PB. In order to assert the enable output, the PB pin must stay low continuously (PB high resets timers) for a time controlled by the default 32ms and the external ONT capacitor (t2–t1). Once EN goes high (t2), an internal 512ms blanking timer is started. This blanking timer is designed to give sufficient time for the DC/DC converter to reach its final voltage, and to allow the μP enough time to perform power on tasks. The KILL pin must be pulled high within 512ms of the EN pin going high. Failure to do so results in the EN pin going low 512ms after it went high. (EN = low, see Figure 2). Note that the LTC2950 does not sample KILL and PB until after the 512ms internal timer has expired. The reason PB is ignored is to ensure that the system is not forced off while powering on. Once the 512ms timer expires (t4), the release of the PB pin is then debounced with an internal 32ms timer. The system has now properly powered on and the LTC2950 monitors PB and KILL (for a turnoff command) while consuming only 6μA of supply current. A high to low transition on PB (t5) initiates the power off sequence. PB must stay low continuously (PB high resets debounce timer) for a period controlled by the default 32ms and the external OFFT capacitor (t6–t5). At the completion of the OFFT timing (t6), an interrupt (INT) is set, signifying that EN will be switched low in 1024ms. Once a system has finished performing its power down operations, it can set KILL low (t7) and thus immediately set EN low), terminating the internal 1024ms timer. The release of the PB pin is then debounced with an internal 32ms timer. The system is now in its reset state: where the LTC2950 is in low power mode (6μA). PB is monitored for a high to low transition. 295012fb 9 LTC2950-1/LTC2950-2 APPLICATIONS INFORMATION t1 PB tDB, ON ONT tONT t2 t3 PB & KILL IGNORED tKILL, ON BLANK tDB, OFF t4 t5 t6 PB IGNORED < tKILL, OFF DELAY t7 tOFFT OFFT INT –6V) and above VIN (2μA), the PB voltage may fall close to the threshold window. To mitigate the effect of the board leakage, a 10k resistor to VIN is recommended (see Figure 9). Reverse Battery Protection To protect the LTC2950 from a reverse battery connection, place a 1k resistor in series with the VIN pin (see Figure 10). VIN R7 10k VIN LTC2950-1/ LTC2950-2 2.4V 100k PB EXTERNAL BOARD LEAKAGE CURRENT >2μA GND PINS OMITTED FOR CLARITY 2950 F09 IF EXTERNAL PARASITIC BOARD LEAKAGE >2μA, USE EXTERNAL PULL-UP RESISTOR Figure 9. External Pull-Up Resistor on PB Pin PACKAGE DESCRIPTION DDB Package 8-Lead Plastic DFN (3mm × 2mm) (Reference LTC DWG # 05-08-1702) 0.61 0.05 (2 SIDES) 0.70 2.55 0.05 1.15 0.05 PACKAGE OUTLINE 0.25 0.05 0.50 BSC 2.20 0.05 (2 SIDES) RECOMMENDED SOLDER PAD PITCH AND DIMENSIONS NOTE: 1. DRAWING CONFORMS TO VERSION (WECD-1) IN JEDEC PACKAGE OUTLINE M0-229 2. DRAWING NOT TO SCALE 3. ALL DIMENSIONS ARE IN MILLIMETERS 4. DIMENSIONS OF EXPOSED PAD ON BOTTOM OF PACKAGE DO NOT INCLUDE MOLD FLASH. MOLD FLASH, IF PRESENT, SHALL NOT EXCEED 0.15mm ON ANY SIDE 5. EXPOSED PAD SHALL BE SOLDER PLATED 6. SHADED AREA IS ONLY A REFERENCE FOR PIN 1 LOCATION ON THE TOP AND BOTTOM OF PACKAGE 0.05 PIN 1 BAR TOP MARK (SEE NOTE 6) 2.00 0.10 (2 SIDES) 0.56 0.05 (2 SIDES) 0.75 0.05 0.25 PIN 1 R = 0.20 OR 0.25 45° CHAMFER (DDB8) DFN 0905 REV B 3.00 0.10 (2 SIDES) R = 0.05 TYP R = 0.115 TYP 5 0.40 8 0.10 0.200 REF 4 0.05 2.15 0.05 (2 SIDES) 1 0.50 BSC 0 – 0.05 BOTTOM VIEW—EXPOSED PAD 295012fb 14 LTC2950-1/LTC2950-2 PACKAGE DESCRIPTION TS8 Package 8-Lead Plastic TSOT-23 (Reference LTC DWG # 05-08-1637) 0.52 MAX 0.65 REF 2.90 BSC (NOTE 4) 1.22 REF 3.85 MAX 2.62 REF 1.4 MIN 2.80 BSC 1.50 – 1.75 (NOTE 4) PIN ONE ID RECOMMENDED SOLDER PAD LAYOUT PER IPC CALCULATOR 0.65 BSC 0.22 – 0.36 8 PLCS (NOTE 3) 0.80 – 0.90 0.20 BSC 1.00 MAX DATUM ‘A’ 0.01 – 0.10 0.30 – 0.50 REF NOTE: 1. DIMENSIONS ARE IN MILLIMETERS 2. DRAWING NOT TO SCALE 3. DIMENSIONS ARE INCLUSIVE OF PLATING 4. DIMENSIONS ARE EXCLUSIVE OF MOLD FLASH AND METAL BURR 5. MOLD FLASH SHALL NOT EXCEED 0.254mm 6. JEDEC PACKAGE REFERENCE IS MO-193 0.09 – 0.20 (NOTE 3) 1.95 BSC TS8 TSOT-23 0802 295012fb Information furnished by Linear Technology Corporation is believed to be accurate and reliable. However, no responsibility is assumed for its use. Linear Technology Corporation makes no representation that the interconnection of its circuits as described herein will not infringe on existing patent rights. 15 LTC2950-1/LTC2950-2 TYPICAL APPLICATION VIN 9V BATTERY VOUT + R8 1k R5 910k LT1761-1.8 SHDN 1.8V C4 0.1μF VIN LTC2950-1 PB GND ONT EN INT KILL OFFT CONT* 0.033μF COFFT* 0.033μF R1 10k INT μP KILL *OPTIONAL 2950 F10 Figure 10. Reverse Battery Protection RELATED PARTS PART NUMBER LTC2900 LTC2904/2905 LTC4411 LTC4412HV LTC4055 DESCRIPTION Programmable Quad Supply Monitor Pin-Programmable Dual Supply Monitors 2.6A Low Loss Ideal Diode in ThinSOT Power Path Controller in ThinSOT USB Power Controller and Li-Ion Charger COMMENTS Adjustable RESET, 10-Lead MSOP and 3mm x 3mm DFN Packages Adjustable RESET and Tolerance, 8-Lead SOT-23 and 3mm x 2mm DFN Packages No External MOSFET, Automatic Switching Between DC Sources Efficient Diode-ORing, Automatic Switching Between DC Sources, 3V to 36V Automatic Switchover, Charges 1-Cell Li-Ion Batteries 295012fb 16 Linear Technology Corporation (408) 432-1900 ● LT 0208 REV B • PRINTED IN USA 1630 McCarthy Blvd., Milpitas, CA 95035-7417 FAX: (408) 434-0507 ● www.linear.com © LINEAR TECHNOLOGY CORPORATION 2008