LTC3105 LINER
Document overview
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Technical content
Converter with Maximum Power Point Control and 250mV Start-Up The L TC®3105 is a high efficiency step-up DC/DC converter that can operate from input voltages as low as 225mV . A 250mV start-up capability and integrated maximum power point controller (MPPC) enable operation directly from low voltage, high impedance alternative power sources such as photovoltaic cells, TEGs (thermoelectric generators) and fuel cells. A user programmable MPPC set point maximizes the energy that can be extracted from any power source. Burst Mode operation, with a proprietary self adjusting peak current, optimizes converter efficiency and output voltage ripple over all operating conditions. The AUX powered 6mA LDO provides a regulated rail for external microcontrollers and sensors while the main output is charging. In shutdown, I Q is reduced to 10µA and integrated thermal shutdown offers protection from overtemperature faults. The L TC3105 is offered in 10-lead 3mm × 3mm × 0.75mm DFN and 12-lead MSOP packages. Output Current vs Input Voltage
APPLICATIONS
n Low Start-Up Voltage: 250mV n Maximum Power Point Control n Wide VIN Range: 225mV to 5V n Auxiliary 6mA LDO Regulator n Burst Mode® Operation: IQ = 24µA n Output Disconnect and Inrush Current Limiting n VIN > VOUT Operation n Antiringing Control n Soft Start n Automatic Power Adjust n Power Good Indicator n 10-Lead 3mm × 3mm × 0.75mm DFN and 12-Lead MSOP Packages n Solar Powered Batter y/Supercapacitor Chargers n Energy Har vesting n Remote Industrial Sensors n Low Power Wireless T ransmitters n Cell Phone, MP3, PMP and GPS Accessor y Chargers L, L T , L TC, L TM, Linear Technology, the Linear logo and Burst Mode are registered trademarks and ThinSOT is a trademark of Linear Technology Corporation. All other trademarks are the property of their respective owners.
3105 TA01a
10µF Li-Ion 1020k 225mV TO 5V VOUT 4.1V 332k FB PGOOD LDO FBLDO MPPC VIN SHDN AUX SW VOUT 4.7µF 2.2V 40.2k 1µF L TC3105 GND 10µF 10µH PHOTOVOL TAIC CELL ONOFF Single Photovoltaic Cell Li-Ion T rickle Charger INPUT VOL TAGE (V) 0.2 OUTPUT CURRENT (mA)20 1.0
3105 TA01b
VOUT = 5V VOUT = 3.3V VOUT = 4.2V MPPC DISABLED
Operating Junction Temperature (Note 1) TOP VIEW GND DD PACKAGE 10-LEAD (3mm × 3mm) PLASTIC DFN
1 AUX
V IN FB LDO FBLDO SHDN MPPC TJMAX = 125°C, θJA = 43°C/W , θJC = 3°C/W EXPOSED PAD (PIN 11) IS GND, MUST BE SOLDERED TO PCB FB LDO FBLDO SHDN MPPC GND AUX V OUT PGOOD SW V IN GND TOP VIEW MS PACKAGE 12-LEAD PLASTIC MSOP TJMAX = 125°C, θJA = 130°C/W , θJC = 21°C/W PIN CONFIGURATION ORDER INFORMATION LEAD FREE FINISH TAPE AND REEL PART MARKING PACKAGE DESCRIPTION TEMPERATURE RANGE L TC3105EDD#PBF L TC3105EDD#TRPBF LFQC 10-Lead (3mm × 3mm) Plastic DFN –40°C to 85°C L TC3105EMS#PBF L TC3105EMS#TRPBF 3105 12-Lead Plastic MSOP –40°C to 85°C Consult L TC Marketing for parts specified with wider operating temperature ranges. Consult L TC Marketing for information on non-standard 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/ Lead Temperature (Soldering, 10 sec.)
ELECTRICAL CHARACTERISTICS
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: The L TC3105 is tested under pulsed load conditions such that T J ≈ TA. The L TC3105E is guaranteed to meet specifications from 0°C to 85°C junction temperature. Specifications over the –40°C to 85°C operating junction temperature range are assured by design, character- ization and correlation with statistical process controls. Note that the maximum ambient temperature consistent with these specifications is determined by specific operating conditions in conjunction with board layout, the rated package thermal impedance and other environmental factors. The l denotes the specifications which apply over the full operating junction temperature range, otherwise specifications are at TA = 25°C (Note 2). VAUX = VOUT = 3.3V , VLDO = 2.2V , VIN = 0.6V , unless otherwise noted. PARAMETER CONDITIONS MIN TYP MAX UNITS Step-Up Converter Input Operating Voltage l 0.225 5 V Input Start-Up Voltage (Note 5) TJ = 0°C to 85°C (Note 5) l 0.25 0.4 0.36 V V Output Voltage Adjust Range l 1.5 5.25 V Feedback Voltage (FB Pin) l 0.984 1.004 1.024 V VOUT IQ in Operation VFB = 1.10V 24 µA VOUT IQ in Shutdown SHDN = 0V 10 µA MPPC Pin Output Current VMPPC = 0.6V 9.72 10 10.28 µA SHDN Input Logic High Voltage l 1.1 V SHDN Input Logic Low Voltage l 0.3 V N-Channel SW Pin Leakage Current VIN = VSW = 5V , VSHDN = 0V 1 10 µA P-Channel SW Pin Leakage Current VIN = VSW = 0V , VOUT = VAUX = 5.25V 1 10 µA N-Channel On-Resistance: SW to GND 0.5 Ω P-Channel On-Resistance: SW to VOUT 0.5 Ω Peak Current Limit VFB = 0.90V , VMPPC = 0.4V (Note 3) 0.4 0.5 A Valley Current Limit VFB = 0.90V , VMPPC = 0.4V (Note 3) 0.275 0.35 A PGOOD Threshold (% of Feedback Voltage) VOUT Falling 85 90 95 % LDO Regulator LDO Output Adjust Range External Feedback Network, VAUX > VLDO l 1.4 5 V LDO Output Voltage VFBLDO = 0V l 2.148 2.2 2.236 V Feedback Voltage (FBLDO Pin) External Feedback Network l 0.984 1.004 1.024 V Load Regulation ILDO = 1mA to 6mA 0.40 % Line Regulation VAUX = 2.5V to 5V 0.15 % Dropout Voltage ILDO = 6mA, VOUT = VAUX = 2.2V 105 mV LDO Current Limit VLDO 0.5V Below Regulation Voltage l 6 12 mA LDO Reverse-Blocking Leakage Current VIN = VAUX = VOUT = 0V , VSHDN = 0V 1 µA Note 3: Current measurements are performed when the L TC3105 is not switching. The current limit values measured in operation will be somewhat higher due to the propagation delay of the comparators. Note 4: This IC includes over temperature protection that is intended to protect the device during momentary overload conditions. Junction temperature will exceed 125°C when overtemperature protection is active. Continuous operation above the specified maximum operating junction temperature may impair device reliability. Note 5: The L TC3105 has been optimized for use with high impedance power sources such as photovoltaic cells and thermoelectric generators. The input start-up voltage is measured using an input voltage source with a series resistance of approximately 200mΩ and MPPC enabled. Use of the L TC3105 with lower resistance voltage sources or with MPPC disabled may result in a higher input start-up voltage.
Minimum Input Start-Up Voltage vs Temperature Shutdown Thresholds vs Input Voltage IC Enable Delay vs Input Voltage TYPICAL PERFORMANCE CHARACTERISTICS TA = 25°C, VAUX = VOUT = 3.3V , VLDO = 2.2V , VIN = 0.6V , unless otherwise noted. TEMPERATURE (°C) –45 INPUT VOLTAGE (mV) 280 –15 15 45 240 260 340 220 200 320 300 –30 0 75 9030 60
3105 G01
TEMPERATURE (°C) –45 CHANGE FROM 25°C (%) 0.5 –15 15 45 –0.5 2.0 2.5 –1.0 –1.5 1.5 1.0 –30 0 75 9030 60
3105 G05 LDO LOAD CURRENT (mA)
0.95 SOFT-START TIME (ms)
1.05 1.15 2 3 4 5 1.25 1.00 1.10 1.20
3105 G06
TEMPERATURE (°C) –45 IQ (µA)12 –15 15 45 –30 0 75 9030 60
3105 G07
SHDN = 0V SUPPL Y VOL TAGE, VIN OR VAUX (V) 1.25 THRESHOLD VOLTAGE (mV)200 400 600 2.25 3.25 4.25 800 1000 100 300 500 700 900 5.25
3105 G02
DELAY TIME (µs)
3105 G03
SUPPL Y VOL TAGE, VIN OR VAUX (V) 120 100 OUTPUT VOL TAGE (V) 1.5 MAXIMUM INPUT VOLTAGE (V)1.0 2.0 3.0 4.0 5.0 0.5 1.5 2.5 3.5 4.5 5.5
3105 G09
VIN for Synchronous Operation
IPEAK and IVALLEY Current Limit Change vs Temperature Input and Output Burst Ripple Efficiency vs Output Current and Power Loss, V OUT = 3.3V Efficiency vs Output Current and Power Loss, V OUT = 5V No-Load Input Current vs Input Voltage TYPICAL PERFORMANCE CHARACTERISTICS TA = 25°C, VAUX = VOUT = 3.3V , VLDO = 2.2V , VIN = 0.6V , unless otherwise noted. INPUT VOL TAGE (V) 0.2 INPUT CURRENT (µA)200 400 600 0.4 0.6 0.8 1.0 800 100 300 500 700 1.2
3105 G16
VOUT = 3.3V OUTPUT CURRENT (mA) EFFICIENCY (%) POWER LOSS (mW) 100 0.1 1000
3105 G14
VIN = 0.6V VIN = 0.8V VIN = 1V EFFICIENCY POWER LOSS 0.01 10.1 10 100 OUTPUT CURRENT (mA) 0.01 EFFICIENCY (%) POWER LOSS (mW) 10.1 10 100 100 100 0.1 1000
3105 G15
VIN = 3V VIN = 2V VIN = 1.5V EFFICIENCY POWER LOSS TEMPERATURE (°C) –45 CHANGE FROM 25°C (%) –0.5 –15 15 45 –1.5 –1.0 1.0 –2.0 –2.5 0.5 –30 0 75 9030 60
3105 G11
15µs/DIV 3105 G10 VIN VOL TAGE 200mV/DIV INDUCTOR CURRENT 100mA/DIV MPPC VOLTAGE 200mV/DIV VMPPC = 400mV INPUT VOL TAGE (V) 0.25 EFFICIENCY (%)60 1.25 2.25 3.25 4.25 100 5.25
3105 G12
VOUT = 3V ILOAD = 10mA LDO = 2.2V 50µs/DIV 3105 G13 OUTPUT VOL TAGE 50mV/DIV INPUT VOL TAGE 5mV/DIV SW CURRENT 200mA/DIV VIN = 0.6V CIN = 470µF VOUT = 3.3V IOUT = 15mA COUT = 10µF Efficiency vs VIN
FB (Pin 1/Pin 1): Step-Up Converter Feedback Input. Con- nect the VOUT resistor divider tap to this input. The output voltage can be adjusted between 1.5V and 5.25V . LDO (Pin 2/Pin 2): LDO Regulator Output. Connect a 4.7µF or larger capacitor between LDO and GND. FBLDO (Pin 3/Pin 3): LDO Feedback Input. Connect the LDO resistive divider tab to this input. Alternatively, con- necting FBLDO directly to GND will configure the LDO output voltage to be internally set at 2.2V (nominal). SHDN (Pin 4/Pin 4): Logic Controlled Shutdown Input. With SHDN open, the converter is enabled by an internal 2MΩ pull-up resistor . The SHDN pin should be driven with an open-drain or open-collector pull-down and floated until the converter has entered normal operation. Excessive loading on this pin may cause a failure to complete start-up. SHDN = Low: IC Disabled SHDN = High: IC Enabled MPPC (Pin 5/Pin 5): Set Point Input for Maximum Power Point Control. Connect a resistor from MPPC to GND to program the activation point for the MPPC loop. To disable the MPPC circuit, connect MPPC directly to GND. V IN (Pin 6/Pin 8): Input Supply. Connect a decoupling capacitor between this pin and GND. The PCB trace length from the VIN pin to the decoupling capacitor should be as short and wide as possible. When used with high imped- ance sources such as photovoltaic cells, this pin should have a 10µF or larger decoupling capacitor . GND (Exposed Pad Pin 11/Pins 6, 7) : Small Signal and Power Ground for the IC. The GND connections should be soldered to the PCB ground using the lowest impedance path possible. SW (Pin 7/Pin 9): Switch Pin. Connect an inductor between SW and VIN. PCB trace lengths should be as short as pos- sible to reduce EMI. While the converter is sleeping or is in shutdown, the internal antiringing switch connects the SW pin to the VIN pin in order to minimize EMI. PGOOD (Pin 8/Pin 10): Power Good Indicator . This is an open-drain output. The pull-down is disabled when VOUT has achieved the voltage defined by the feedback divider on the FB pin. The pull-down is also disabled while the IC is in shutdown or start-up mode. V OUT (Pin 9/Pin 11): Step-Up Converter Output. This is the drain connection of the main output internal synchronous rectifier . A 10µF or larger capacitor must be connected between this pin and GND. The PCB trace length from the V OUT pin to the output filter capacitor should be as short and wide as possible. AUX (Pin 10/Pin 12): Auxiliary Voltage. Connect a 1µF capacitor between this pin and GND. This pin is used by the start-up circuitry to generate a voltage rail to power internal circuitry until the main output reaches regulation. AUX and VOUT are internally connected together once VOUT exceeds VAUX. (DFN/MSOP)
1.5V TO 5.25V VOUT AUX LDO CIN 10µF RMPPC 10µH EXPOSED PAD USER SHUTDOWN SHUTDOWN VALLEY CURRENT LIMIT PEAK CURRENT LIMIT VIN LOGIC SLEEP SHUTDOWN CLDO 4.7µF 1.004V 1.004V SLEEP SHUTDOWN VCC VAUX +–+– VIN 10µA MPPC SW LOW VOL TAGE START-UP CURRENT ADJUST BURST CONTROL 225mV TO 5V + – PGOOD FB COUT 10µF CAUX 1µF 0.9V FB 3105 BD SHORT CONTROL WELL CONTROL OR VCC SLEEP VCCVAUX VIN gm BLOCK DIAGRAM (Pin Numbers for DFN Package Only)
The L TC3105 is a unique, high performance, synchronous boost converter that incorporates maximum power point control, 250mV start-up capability and an integrated LDO regulator . This part operates over a very wide range of input voltages from 225mV to 5V . Its Burst Mode architecture and low 24µA quiescent current optimize efficiency in low power applications. An integrated maximum power point controller allows for operation directly from high impedance sources such as photovoltaic cells by preventing the input power source voltage from collapsing below the user programmable MPPC threshold. Peak current limits are automatically adjusted with proprietary techniques to maintain operation at levels that maximize power extraction from the source. The 250mV start-up voltage and 225mV minimum operating voltage enable direct operation from a single photovoltaic cell and other very low voltage, high series impedance power sources such as TEGs and fuel cells. Synchronous rectification provides high efficiency opera- tion while eliminating the need for external Schottky diodes. The L TC3105 provides output disconnect which prevents large inrush currents during start-up. This is particularly important for high internal resistance power sources like photovoltaic cells and thermoelectric generators which can become overloaded if inrush current is not limited during start-up of the power converter . In addition, output disconnect isolates V OUT from VIN while in shutdown. VIN > VOUT Operation The L TC3105 includes the ability to seamlessly maintain regulation if VIN becomes equal to or greater than VOUT. With V IN greater than or equal to V OUT, the synchro- nous rectifiers are disabled which may result in reduced efficiency. Shutdown Control The SHDN pin is an active low input that places the IC into low current shutdown mode. This pin incorporates an internal 2MΩ pull-up resistor which enables the converter if the SHDN pin is not controlled by an external circuit. The SHDN pin should be allowed to float while the part is in OPERATION start-up mode. Once in normal operation, the SHDN pin may be controlled using an open-drain or open-collector pull-down. Other external loads on this pin should be avoided, as they may result in the part failing to reach regulation. In shutdown, the internal switch connecting AUX and V OUT is enabled. When the SHDN pin is released, the L TC3105 is enabled and begins switching after a short delay. When either VIN or VAUX is above 1.4V , this delay will typically range be- tween 20µs and 100µs. Refer to the Typical Performance Characteristics section for more details. Start-Up Mode Operation The L TC3105 provides the capability to start with voltages as low as 250mV . During start-up the AUX output initially is charged with the synchronous rectifiers disabled. Once VAUX has reached approximately 1.4V , the converter leaves start-up mode and enters normal operation. Maximum power point control is not enabled during start-up, however , the currents are internally limited to sufficiently low levels to allow start-up from weak input sources. While the converter is in start-up mode, the internal switch between AUX and V OUT remains disabled and the LDO is disabled. Refer to Figure 1 for an example of a typical start-up sequence. The L TC3105 is optimized for use with high impedance power sources such as photovoltaic cells. For operation from very low impedance, low input voltage sources, it may be necessary to add several hundred milliohms of series input resistance to allow for proper low voltage start-up. Normal Operation When either VIN or VAUX is greater than 1.4V typical, the converter will enter normal operation. The converter continues charging the AUX output until the LDO output enters regulation. Once the LDO output is in regulation, the converter begins charging the V OUT pin. VAUX is maintained at a level sufficient to ensure the LDO remains in regulation. If VAUX becomes higher than required to maintain LDO regulation, charge is transferred from the AUX output to the VOUT output. If VAUX falls too low, current is redirected to the AUX output instead of being used to charge the V OUT output. Once V OUT rises
3105 F01
before the cycle is repeated. and greater than 1.2V , the synchronous rectifier is enabled. limit and the cycle is repeated. Figure 1. Typical Converter Start-Up Sequence and the converter enters sleep.
When the converter is placed in shutdown mode, the LDO is forced into reverse-blocking mode with reverse current limited to under 1µA. After the shutdown event has ended, the LDO remains in reverse-blocking mode until VAUX has risen above the LDO voltage. MPPC Operation The maximum power point control circuit allows the user to set the optimal input voltage operating point for a given power source. The MPPC circuit dynamically regulates the average inductor current to prevent the input voltage from dropping below the MPPC threshold. When V IN is greater than the MPPC voltage, the inductor current is increased until VIN is pulled down to the MPPC set point. If VIN is less than the MPPC voltage, the inductor current is reduced until VIN rises to the MPPC set point. Automatic Power Adjust The L TC3105 incorporates a feature that maximizes ef - ficiency at light load while providing increased power capability at heavy load by adjusting the peak and valley of the inductor current as a function of load. Lowering the peak inductor current to 100mA at light load optimizes efficiency by reducing conduction losses. As the load increases, the peak inductor current is automatically in - creased to a maximum of 500mA. At intermediate loads, the peak inductor current can vary between 100mA to 500mA. This function is overridden by the MPPC function and will only be observed when the power source can deliver more power than the load requires. PGOOD Operation The power good output is used to indicate that V OUT is in regulation. PGOOD is an open-drain output, and is disabled in shutdown. PGOOD will indicate that power is good at the beginning of the first sleep event after the output voltage has risen above 90% of its regulation value. PGOOD remains asserted until V OUT drops below 90% of its regulation value at which point PGOOD will pull low. OPERATION Component Selection Low DCR power inductors with values between 4.7µH and 30µH are suitable for use with the L TC3105. For most applications, a 10µH inductor is recommended. In applications where the input voltage is very low, a larger value inductor can provide higher efficiency and a lower start-up voltage. In applications where the input voltage is relatively high (V IN > 0.8V), smaller inductors may be used to provide a smaller overall footprint. In all cases, the inductor must have low DCR and sufficient saturation current rating. If the DC resistance of the inductor is too high, efficiency will be reduced and the minimum operating voltage will increase. Input capacitor selection is highly important in low voltage, high source resistance systems. For general applications, a 10µF ceramic capacitor is recommended between V IN and GND. For high impedance sources, the input capacitor APPLICATIONS INFORMATION should be large enough to allow the converter to complete start-up mode using the energy stored in the input ca - pacitor . When using bulk input capacitors that have high ESR, a small valued parallel ceramic capacitor should be placed between V IN and GND as close to the converter pins as possible. A 1µF ceramic capacitor should be connected between AUX and GND. Larger capacitors should be avoided to minimize start-up time. A low ESR output capacitor should be connected between V OUT and GND. The main output capacitor should be 10µF or larger . The main output can also be used to charge energy storage devices including tantalum capacitors, supercapacitors and batteries. When using output bulk storage devices with high ESR, a small valued ceramic capacitor should be placed in parallel and located as close to the converter pins as possible.
Figure 2. FB Configuration
3105 F02
Figure 3. FBLDO Configuration
3105 F03
Figure 4. MPPC Configuration Figure 5. MPPC Configuration with Temperature Adjustment
3105 F04
3105 F05
3105 TA02a
3105 TA02b
minimum diode forward voltage. Figure 6. Current Loop Power Tap
3105 F06
3105 TA02
3.3V from Multiple Stacked-Cell Photovoltaic with Source Temperature Tracking Thermoelectric Generator to 2.4V Super Capacitor Charger
3105 TA03
10µF 1.37M VOUT 3.3V 604k FB PGOOD LDO FBLDO MPPC SHDN AUX SW CLDO 4.7µF 2.2V CAUX 1µF RMPPC 4.99k CIN 10µF * MRA4003T3 PANASONIC ELL-VEG6R8N L1 6.8µH L TC3105 CMPPC 10nF GND ONOFF VIN VOUT D1* D2* THERMALL Y COUPLED
3105 TA04
2.5V 1.10M V OUT 2.4V 787k FB PGOOD LDO FBLDO MPPC VIN SHDN AUX SW VOUT CLDO 4.7µF 2.2V CFF 22pF RMPPC 30.1k * MICROPEL T MPG-D751 ** COILCRAFT MSS5131-103MX TEG* ∆T ≥ 10°C CAUX 1µF CIN 100µF L1** 10µH L TC3105 GND COUT 1µF ONOFF
3105 TA05a
Industrial Sensor 4mA to 20mA Current Loop Power Tap T ransient Response to Load Pulse with 4mA Loop Current Start-Up VIN, VOUT, VLDO
3105 TA05
VOUT, 3V FB ENPGOOD LDO FBLDO MPPC SHDN AUX SW µP CAUX 1µF RMPPC 28k 280mV 2.2V CIN 470µF 4mA TO 20mA CURRENT LOOP D1* L1** 10µH L TC3105 GND 10µF VFWD = 330mV RPG 499k * MBRS190T3 ** COILCRAFT MSS5131-103MX ONOFF VIN VDD VOUT CLDO 4.7µF Single-Cell Photovoltaic NiMH T rickle Charger
3105 TA06
× 2 1.02M V OUT 3.2V 470k FB PGOOD LDO FBLDO MPPC SHDN AUX SW CLDO 4.7µF 1.8V RMPPC 40.2k CAUX 1µF CIN 10µF L1, 10µH L TC3105 GND COUT 10µF 1.27M ONOFF VIN VOUT
10-Lead Plastic DFN (3mm × 3mm) (Reference L TC DWG # 05-08-1699 Rev C) 3.00 ±0.10 (4 SIDES) NOTE: 1. DRAWING TO BE MADE A JEDEC PACKAGE OUTLINE M0-229 VARIATION OF (WEED-2). CHECK THE LTC WEBSITE DATA SHEET FOR CURRENT STATUS OF VARIATION ASSIGNMENT 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 0.40 ± 0.10 BOTTOM VIEW—EXPOSED PAD 1.65 ± 0.10 (2 SIDES) 0.75 ±0.05 R = 0.125 TYP 2.38 ±0.10 (2 SIDES) 106 PIN 1 TOP MARK (SEE NOTE 6)
0.200 REF
0.00 – 0.05 (DD) DFN REV C 0310 0.25 ± 0.05 2.38 ±0.05 (2 SIDES) RECOMMENDED SOLDER PAD PITCH AND DIMENSIONS 1.65 ±0.05 (2 SIDES)2.15 ±0.05 0.50 BSC 0.70 ±0.05 3.55 ±0.05 PACKAGE OUTLINE 0.25 ± 0.05
0.50 BSC
10-Lead Plastic DFN (3mm × 3mm) (Reference LTC DWG # 05-08-1699 Rev C) PIN 1 NOTCH R = 0.20 OR 0.35 × 45° CHAMFER
(Reference L TC DWG # 05-08-1668 Rev Ø) PACKAGE DESCRIPTION MSOP (MS12) 1107 REV Ø 0.53 ± 0.152 (.021 ± .006) SEATING PLANE 0.18 (.007) 1.10 (.043) MAX 0.22 – 0.38 (.009 – .015) TYP 0.86 (.034) REF 0.650 (.0256) BSC 12 11 10 9 8 7 NOTE: 1. DIMENSIONS IN MILLIMETER/(INCH) 2. DRAWING NOT TO SCALE 3. DIMENSION DOES NOT INCLUDE MOLD FLASH, PROTRUSIONS OR GATE BURRS. MOLD FLASH, PROTRUSIONS OR GATE BURRS SHALL NOT EXCEED 0.152mm (.006") PER SIDE 4. DIMENSION DOES NOT INCLUDE INTERLEAD FLASH OR PROTRUSIONS. INTERLEAD FLASH OR PROTRUSIONS SHALL NOT EXCEED 0.152mm (.006") PER SIDE 5. LEAD COPLANARITY (BOTTOM OF LEADS AFTER FORMING) SHALL BE 0.102mm (.004") MAX 0.254 (.010) 0° – 6° TYP DETAIL “A” DETAIL “A” GAUGE PLANE 5.23 (.206) MIN 3.20 – 3.45 (.126 – .136) 0.889 ± 0.127 (.035 ± .005) RECOMMENDED SOLDER PAD LAYOUT 0.42 ± 0.038 (.0165 ± .0015) TYP 0.65 (.0256) BSC 4.039 ± 0.102 (.159 ± .004) (NOTE 3) 0.1016 ± 0.0508 (.004 ± .002) 1 2 3 4 5 6 3.00 ± 0.102 (.118 ± .004) (NOTE 4) 0.406 ± 0.076 (.016 ± .003) REF 4.90 ± 0.152 (.193 ± .006) 12-Lead Plastic MSOP (Reference LTC DWG # 05-08-1668 Rev Ø)
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 representa- tion that the interconnection of its circuits as described herein will not infringe on existing patent rights.
REVISION HISTORY
REV DATE DESCRIPTION PAGE NUMBER A 02/11 Added (Note 5) notation to Input Start-Up Voltage conditions 3 Added Note 5 3 Updated Start-Up Mode Operation section 8
Linear Technology Corporation 1630 McCarthy Blvd., Milpitas, CA 95035-7417 (408) 432-1900 ● FAX: (408) 434-0507 ● www.linear .com LINEAR TECHNOLOGY CORPORA TION 2010 LT 0211 REV A • PRINTED IN USA RELATED PARTS TYPICAL APPLICATION PART NUMBER DESCRIPTION COMMENTS L TC3108/L TC3108-1 Ultralow Voltage Step-Up Converter and Power Manager DFN-12, SSOP-16 Packages; L TC3108-1 VOUT = 2.2V , 2.5V , 3V , 3.7V , 4.5V L TC3109 Auto-Polarity, Ultralow Voltage Step-Up Converter and Power Manager QFN-20, SSOP-20 Packages L TC4070 Li-Ion/Polymer Shunt Battery Charger System 450nA IQ; 1% Float Voltage Accuracy; 50mA Shunt Current 4.0V/4.1V/4.2V L TC4071 Li-Ion/Polymer Shunt Battery Charger System with Low Battery Disconnect 550nA I Q; 1% Float Voltage Accuracy; <10nA Low Battery Disconnect; 4.0V/4.1V/4.2V; 8-Lead 2mm × 3mm DFN and MSOP Packages L TC3588-1/L TC3588-2 Piezoelectric Energy Harvesting Power Supply < 1µA IQ in Regulation; 2.7V to 20V Input Range; Integrated Bridge Rectifier L TC3388-1/L TC3388-3 20V High Efficiency Nanopower Step-Down Regulator 860nA I Q in Sleep; 2.7V to 20V Input; VOUT: 1.2V to 5V; Enable and Standby Pins L TC3225/L TC3225-1 150mA Super Capacitor Charger Programmable Charge Current Up to 150mA; Constant-Frequency Charging of Two Series Supercapacitors; No Inductors; 2mm × 3mm DFN Package L TC3525-3/L TC3525-3.3/ L TC3525-5/L TC3525L-3 400mA Micropower Synchronous Step-Up DC/DC Converter with Output Disconnect 95% Efficiency; V IN: 1V to 4.5V; VOUT = 3V , 3.3V or 5V; IQ = 7μA; ISD < 1μA; SC70 Package; L TC3525L-3 VIN: 0.7V to 4.5V L TC3526L/L TC3526L-2/ L TC3526LB/L TC3526LB-2 550mA, 1MHz/2MHz Synchronous Boost Converter 95% Efficiency; V IN: 0.7V to 5.5V; VOUT(MAX) = 5.25V; IQ = 9μA; ISD < 1μA; 2mm × 2mm DFN Package L TC3527 Dual 2.2MHz 800mA/400mA Synchronous Step- Up DC/DC Converters V IN: 0.5V to 5V; VOUT : 1.6V to 5.25V; IQ = 12μA; ISD < 1μA; 3mm × 3mm QFN Package L TC3528/L TC3528-2/ L TC3528B/L TC3528B-2 1A (I SW), 1MHz/2MHz Synchronous Step-Up DC/DC Converter with Output Disconnect 94% Efficiency; VIN: 0.7V to 5.5V; VOUT(MAX) = 5.25V; IQ = 12μA; ISD < 1μA; 2mm × 3mm DFN-8 Package L TC3537 2.2MHz, 600mA Synchronous Step-Up DC/DC Converter and 100mA LDO V IN: 0.68V to 5V; VOUT : 1.5V to 5.25V; 3mm × 3mm QFN Package L TC3539/L TC3539-2 2A (ISW), 1MHz/2MHz Synchronous Step-Up DC/DC Converter with Output Disconnect 94% Efficiency; VIN: 0.7V to 5V; VOUT(MAX) = 5.25V; IQ = 10μA; ISD < 1μA; 2mm × 3mm DFN Package Single-Cell Powered Remote Wireless Sensor
3105 TA07
2.32M VOUT 3.3V 1.02M FB PGOOD LDO A/D I/O XMTR SENSOR µC FBLDO MPPC EN SHDN AUX SW CLDO 4.7µF 2.2V RMPPC 40.2k RPG 499k CAUX 1µF CIN 10µF L1* 10µH L TC3105 GND GND COUT 100µF VDD GPIO * COILCRAFT MSS5131-103MX 2N7000 ONOFF VIN VOUT