LTC6101ACMS8TRPBF

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DESCRIPTION

High Voltage, High-Side Current Sense Amplifi er in SOT-23 TO μP

6101 TA01

4.99k RIN 100Ω VOUT V+V– OUT –IN +IN VSENSEILOAD 5V TO 105V 1μF5V L O A D – + VOUT = • VSENSE = 49.9VSENSE ROUT RIN 16-Bit Resolution Unidirectional Output into L TC2433 ADC Step Response 5.5V 0.5V 500ns/DIV

6101 TA01b

TA = 25°C V+ = 12V RIN = 100 ROUT = 5k VSENSE + = V+ VOUT VSENSE ΔVSENSE – = 100mV IOUT = 100μA IOUT = 0 The L TC®6101/L TC6101HV are versatile, high voltage, high side current sense amplifi ers. Design fl exibility is provided by the excellent device characteristics; 300μV Max offset and only 375μA (typical at 60V) of current consumption. The L TC6101 operates on supplies from 4V to 60V and L TC6101HV operates on supplies from 5V to 100V . The L TC6101 monitors current via the voltage across an external sense resistor (shunt resistor). Internal circuitry converts input voltage to output current, allowing for a small sense signal on a high common mode voltage to be translated into a ground referenced signal. Low DC offset allows the use of a small shunt resistor and large gain-setting resistors. As a result, power loss in the shunt is reduced. The wide operating supply range and high accuracy make the L TC6101 ideal for a large array of applications from automotive to industrial and power management. A maxi- mum input sense voltage of 500mV allows a wide range of currents to be monitored. The fast response makes the L TC6101 the perfect choice for load current warnings and shutoff protection control. With very low supply current, the L TC6101 is suitable for power sensitive applications. The L TC6101 is available in 5-lead SOT-23 and 8-lead MSOP packages. n Current Shunt Measurement n Battery Monitoring n Remote Sensing n Power Management n Supply Range: 5V to 100V, 105V Absolute Maximum (LTC6101HV) 4V to 60V , 70V Absolute Maximum (L TC6101) n Low Offset Voltage: 300μV Max n Fast Response: 1μs Response Time (0V to 2.5V on a 5V Output Step) n Gain Confi gurable with 2 Resistors n Low Input Bias Current: 170nA Max n PSRR: 118dB Min n Output Current: 1mA Max n Low Supply Current: 250μA, V S = 12V n Specifi ed Temperature Range: –40°C to 125°C n Operating Temperature Range: –55°C to 125°C n Low Profi le (1mm) SOT-23 (ThinSOT™) Package L, L T , L TC, L TM, Linear Technology and the Linear logo are registered trademarks and ThinSOT is a trademark of Linear Technology Corporation. All other trademarks are the property of their respective owners.

Total Supply Voltage (V+ to V–) + – 4V) Output Short-Circuit Duration (to V Operating Temperature Range Specifi ed Temperature Range (Note 2) (Note 1) PIN CONFIGURATION LEAD FREE FINISH TAPE AND REEL PART MARKING* PACKAGE DESCRIPTION SPECIFIED TEMPERATURE RANGE L TC6101ACMS8#PBF L TC6101ACMS8#TRPBF L TBSB 8-Lead Plastic MSOP 0°C to 70°C L TC6101AIMS8#PBF L TC6101AIMS8#TRPBF L TBSB 8-Lead Plastic MSOP –40°C to 85°C L TC6101AHMS8#PBF L TC6101AHMS8#TRPBF L TBSB 8-Lead Plastic MSOP –40°C to 125°C L TC6101HVACMS8#PBF L TC6101HVACMS8#TRPBF L TBSX 8-Lead Plastic MSOP 0°C to 70°C L TC6101HVAIMS8#PBF L TC6101HVAIMS8#TRPBF L TBSX 8-Lead Plastic MSOP –40°C to 85°C L TC6101HVAHMS8#PBF L TC6101HVAHMS8#TRPBF L TBSX 8-Lead Plastic MSOP –40°C to 125°C –IN NC NC OUT +IN V NC V TOP VIEW MS8 PACKAGE 8-LEAD PLASTIC MSOP TJMAX = 150°C, θJA = 300°C/ W OUT 1 V– 2 TOP VIEW S5 PACKAGE 5-LEAD PLASTIC TSOT-23 –IN 3 5 V+ 4 +IN TJMAX = 150°C, θJA = 250°C/ W

TAPE AND REEL (MINI) TAPE AND REEL PART MARKING* PACKAGE DESCRIPTION SPECIFIED TEMPERATURE RANGE L TC6101ACS5#TRMPBF L TC6101ACS5#TRPBF L TBND 5-Lead Plastic TSOT-23 0°C to 70°C L TC6101AIS5#TRMPBF L TC6101AIS5#TRPBF L TBND 5-Lead Plastic TSOT-23 –40°C to 85°C L TC6101AHS5#TRMPBF L TC6101AHS5#TRPBF L TBND 5-Lead Plastic TSOT-23 –40°C to 125°C L TC6101BCS5#TRMPBF L TC6101BCS5#TRPBF L TBND 5-Lead Plastic TSOT-23 0°C to 70°C L TC6101BIS5#TRMPBF L TC6101BIS5#TRPBF L TBND 5-Lead Plastic TSOT-23 –40°C to 85°C L TC6101BHS5#TRMPBF L TC6101BHS5#TRPBF L TBND 5-Lead Plastic TSOT-23 –40°C to 125°C L TC6101CCS5#TRMPBF L TC6101CCS5#TRPBF L TBND 5-Lead Plastic TSOT-23 0°C to 70°C L TC6101CIS5#TRMPBF L TC6101CIS5#TRPBF L TBND 5-Lead Plastic TSOT-23 –40°C to 85°C L TC6101CHS5#TRMPBF L TC6101CHS5#TRPBF L TBND 5-Lead Plastic TSOT-23 –40°C to 125°C L TC6101HVACS5#TRMPBF L TC6101HVACS5#TRPBF L TBSZ 5-Lead Plastic TSOT-23 0°C to 70°C L TC6101HVAIS5#TRMPBF L TC6101HVAIS5#TRPBF L TBSZ 5-Lead Plastic TSOT-23 –40°C to 85°C L TC6101HVAHS5#TRMPBF L TC6101HVAHS5#TRPBF L TBSZ 5-Lead Plastic TSOT-23 –40°C to 125°C L TC6101HVBCS5#TRMPBF L TC6101HVBCS5#TRPBF L TBSZ 5-Lead Plastic TSOT-23 0°C to 70°C L TC6101HVBIS5#TRMPBF L TC6101HVBIS5#TRPBF L TBSZ 5-Lead Plastic TSOT-23 –40°C to 85°C L TC6101HVBHS5#TRMPBF L TC6101HVBHS5#TRPBF L TBSZ 5-Lead Plastic TSOT-23 –40°C to 125°C L TC6101HVCCS5#TRMPBF L TC6101HVCCS5#TRPBF L TBSZ 5-Lead Plastic TSOT-23 0°C to 70°C L TC6101HVCIS5#TRMPBF L TC6101HVCIS5#TRPBF L TBSZ 5-Lead Plastic TSOT-23 –40°C to 85°C L TC6101HVCHS5#TRMPBF L TC6101HVCHS5#TRPBF L TBSZ 5-Lead Plastic TSOT-23 –40°C to 125°C TRM = 500 pieces. *Temperature grades are identifi ed by a label on the shipping container . Consult L TC Marketing for parts specifi ed with wider operating temperature ranges. Consult L TC Marketing for information on lead based fi nish parts. For more information on lead free part marking, go to: http://www.linear .com/leadfree/ For more information on tape and reel specifi cations, go to: http://www.linear .com/tapeandreel/

SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS VS Supply Voltage Range ● 46 0 V VOS Input Offset Voltage V SENSE = 5mV , Gain = 100, L TC6101A VSENSE = 5mV , Gain = 100, L TC6101AC, L TC6101AI VSENSE = 5mV , Gain = 100, L TC6101AH ±85 ±300 ±450 ±535 μV μV μV V SENSE = 5mV , Gain = 100, L TC6101B ±150 ±450 ±810 μV μV VSENSE = 5mV , Gain = 100, L TC6101C ±400 800 1200 μV μV ΔVOS/ΔT Input Offset Voltage Drift V SENSE = 5mV , L TC6101A VSENSE = 5mV , L TC6101B VSENSE = 5mV , L TC6101C μV/°C μV/°C μV/°C I B Input Bias Current R IN = 1M 100 170 245 nA nA IOS Input Offset Current R IN = 1M ● ±2 ±15 nA VSENSE(MAX) Input Sense Voltage Full Scale V OS within Specifi cation, RIN = 1k (Note 3) ● 500 mV PSRR Power Supply Rejection Ratio V S = 6V to 60V , VSENSE = 5mV , Gain = 100 118 115 140 dB dB VS = 4V to 60V , VSENSE = 5mV , Gain = 100 110 105 133 dB dB VOUT Maximum Output Voltage 12V ≤ V S ≤ 60V , VSENSE = 88mV VS = 6V , VSENSE = 330mV , RIN = 1k, ROUT = 10k VS = 4V , VSENSE = 550mV , RIN = 1k, ROUT = 2k V V V V OUT (0) Minimum Output Voltage V SENSE = 0V , Gain = 100, L TC6101A VSENSE = 0V , Gain = 100, L TC6101AC, L TC6101AI VSENSE = 0V , Gain = 100, L TC6101AH 03 0 53.5 mV mV mV V SENSE = 0V , Gain = 100, L TC6101B 04 5 mV mV VSENSE = 0V , Gain = 100, L TC6101C 01 5 0 250 mV mV IOUT Maximum Output Current 6V ≤ V S ≤ 60V , ROUT = 2k, VSENSE = 110mV , Gain = 20 VS = 4V , VSENSE = 550mV , Gain = 2, ROUT = 2k 0.5 mA mA tr Input Step Response (to 2.5V on a 5V Output Step) ΔVSENSE = 100mV T ransient, 6V ≤ VS ≤ 60V , Gain = 50 VS = 4V 1.5 μs μs BW Signal Bandwidth I OUT = 200μA, RIN = 100, ROUT = 5k IOUT = 1mA, RIN = 100, ROUT = 5k 140 200 kHz kHz IS Supply Current V S = 4V , IOUT = 0, RIN = 1M 220 450 475 μA μA VS = 6V , IOUT = 0, RIN = 1M 240 475 525 μA μA VS = 12V , IOUT = 0, RIN = 1M 250 500 590 μA μA VS = 60V , IOUT = 0, RIN = 1M L TC6101AI, L TC6101AC, L TC6101BI, L TC6101BC, L TC6101CI, L TC6101CC L TC6101AH, L TC6101BH, L TC6101CH 375 640 690 720 μA μA μA ELECTRICAL CHARACTERISTICS (L TC6101) The ● denotes the specifi cations which apply over the full specifi ed temperature range, otherwise specifi cations are at TA = 25°C, RIN = 100Ω, ROUT = 10k, VSENSE+ = V+ (see Figure 1 for details), 4V ≤ VS ≤ 60V unless otherwise noted.

SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS VS Supply Voltage Range ● 5 100 V VOS Input Offset Voltage V SENSE = 5mV , Gain = 100, L TC6101HVA VSENSE = 5mV , Gain = 100, L TC6101HVAC, L TC6101HVAI VSENSE = 5mV , Gain = 100, L TC6101HVAH ±85 ±300 ±450 ±535 μV μV μV V SENSE = 5mV , Gain = 100, L TC6101HVB ±150 ±450 ±810 μV μV VSENSE = 5mV , Gain = 100, L TC6101HVC ±400 800 1200 μV μV ΔVOS/ΔT Input Offset Voltage Drift V SENSE = 5mV , L TC6101HVA VSENSE = 5mV , L TC6101HVB VSENSE = 5mV , L TC6101HVC μV/°C μV/°C μV/°C I B Input Bias Current R IN = 1M 100 170 245 nA nA IOS Input Offset Current R IN = 1M ● ±2 ±15 nA VSENSE(MAX) Input Sense Voltage Full Scale V OS within Specifi cation, RIN = 1k (Note 3) ● 500 mV PSRR Power Supply Rejection Ratio V S = 6V to 100V , VSENSE = 5mV , Gain = 100 118 115 140 dB dB VS = 5V to 100V , VSENSE = 5mV , Gain = 100 110 105 133 dB dB VOUT Maximum Output Voltage 12V ≤ V S ≤ 100V , VSENSE = 88mV VS = 5V , VSENSE = 330mV , RIN = 1k, ROUT = 10k V V VOUT (0) Minimum Output Voltage V SENSE = 0V , Gain = 100, L TC6101HVA VSENSE = 0V , Gain = 100, L TC6101HVAC, L TC6101HVAI VSENSE = 0V , Gain = 100, L TC6101HVAH 03 0 53.5 mV mV mV V SENSE = 0V , Gain = 100, L TC6101HVB 04 5 mV mV VSENSE = 0V , Gain = 100, L TC6101HVC 0 150 250 mV mV IOUT Maximum Output Current 5V ≤ V S ≤ 100V , ROUT = 2k, VSENSE = 110mV , Gain = 20 ● 1 mA tr Input Step Response (to 2.5V on a 5V Output Step) ΔVSENSE = 100mV T ransient, 6V ≤ VS ≤ 100V , Gain = 50 VS = 5V 1.5 μs μs BW Signal Bandwidth I OUT = 200μA, RIN = 100, ROUT = 5k IOUT = 1mA, RIN = 100, ROUT = 5k 140 200 kHz kHz IS Supply Current V S = 5V , IOUT = 0, RIN = 1M 200 450 475 μA μA VS = 6V , IOUT = 0, RIN = 1M 220 475 525 μA μA VS = 12V , IOUT = 0, RIN = 1M 230 500 590 μA μA VS = 60V , IOUT = 0, RIN = 1M L TC6101HVI, L TC6101HVC L TC6101HVH 350 640 690 720 μA μA μA V S = 100V , IOUT = 0, RIN = 1M L TC6101HVAI, L TC6101HVAC, L TC6101HVBI, L TC6101HVBC, L TC6101HVCI, L TC6101HVCC L TC6101HVAH, L TC6101HVBH, L TC6101HVCH 350 640 690 720 μA μA μA ELECTRICAL CHARACTERISTICS (L TC6101HV) The ● denotes the specifi cations which apply over the full specifi ed temperature range, otherwise specifi cations are at TA = 25°C, RIN = 100Ω, ROUT = 10k, VSENSE+ = V+ (see Figure 1 for details), 5V ≤ VS ≤ 100V unless otherwise noted.

TYPICAL PERFORMANCE CHARACTERISTICS

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 TC6101C/L TC6101HVC are guaranteed to meet specifi ed performance from 0°C to 70°C. The L TC6101C/L TC6101HVC are designed, characterized and expected to meet specifi ed performance from –40°C to 85°C but are not tested or QA sampled at these temperatures. L TC6101I/ L TC6101HVI are guaranteed to meet specifi ed performance from –40°C to 85°C. The L TC6101H/L TC6101HVH are guaranteed to meet specifi ed performance from –40°C to 125°C. Note 3: R OUT = 10k for 6V ≤ VS ≤ 100V , ROUT = 2k for VS = 4V . L TC6101: IOUT Maximum vs Temperature Input VOS vs Temperature Input V OS vs Supply Voltage Input Sense Range L TC6101: VOUT Maximum vs Temperature L TC6101HV: VOUT Maximum vs Temperature 44 010 20 30 50 100 60 70 80 90 VSUPPLY (V) MAXIMUM VSENSE (V) 2.5 1.5 0.5

6101 G05

TA = 125°C TA = 85°C TA = 70°C TA = 0°C TA = –40°C RIN = 3k ROUT = 3k TA = 25°C LTC6101 LTC6101HV TEMPERATURE (°C) –40 40 80 120 100–20

6101 G06

MAXIMUM OUTPUT (V) VS = 60V VS = 12V VS = 6V VS = 4V TEMPERATURE (°C) –40 40 80 120 100–20

6101 G07

MAXIMUM IOUT (mA) VS = 12V VS = 60V VS = 6V VS = 4V INPUT OFFSET (μV) 800 600 400 200 –200 –400 –600 –800 –1000

6101 G01

TEMPERATURE (°C) –40 120 04 0 8 0–20 20 60 100 A GRADE B GRADE C GRADE RIN = 100 ROUT = 5k VIN = 5mV REPRESENTATIVE UNITS TEMPERATURE (°C) –40 40 80 120 100–20

6101 G20

MAXIMUM OUTPUT (V) VS = 100V VS = 12V VS = 5V VS = 6V VS = 4V VSUPPLY (V) –20 –40 –60 –80 –100 –120 –140

6101 G02

INPUT OFFSET (μV) RIN = 100 ROUT = 5k VIN = 5mV TA = 125°C TA = 85°C TA = 25°C TA = –40°C TA = 0°C

TYPICAL PERFORMANCE CHARACTERISTICS SUPPL Y VOL TAGE (V) SUPPL Y CURRENT (μA) 450 400 350 300 250 200 150 100

6101 G11

81 6 48 5624 402841 2 44 5220 36 60 –40°C 0°C 25°C 70°C 85°C 125°C VIN = 0 RIN = 1M V+-10mV 0.5V TIME (10μs/DIV)

6101 G12

TA = 25°C V+ = 12V RIN = 100 ROUT = 5k VSENSE + = V+ VSENSE VOUT V+-10mV V+-20mV 0.5V TIME (10μs/DIV)

6101 G13

TA = 25°C V+ = 12V RIN = 100 ROUT = 5k VSENSE + = V+ L TC6101: Supply Current vs Supply Voltage Step Response 0mV to 10mV Step Response 10mV to 20mV Input Bias Current vs Temperature Gain vs Frequency GAIN (dB) FREQUENCY (Hz) –10 10k 100k 1M

6101 G09

TA = 25°C RIN = 100 ROUT = 4.99k IOUT = 200μA IOUT = 1mA TEMPERATURE (°C) 160 140 120 100 –40 40 80 120 100–20

6101 G10

IB (nA) VS = 6V TO 100V VS = 4V Output Error Due to Input Offset vs Input Voltage L TC6101HV: IOUT Maximum vs Temperature INPUT VOLTAGE (V) 0.1 OUTPUT ERROR (%) 100 0 0.2 0.3 0.4 0.01

6101 G08

TA = 25°C GAIN =10 TEMPERATURE (°C) –40 40 80 120 100–20

6101 G21

MAXIMUM IOUT (mA) VS = 12V VS = 100V VS = 6V VS = 5V VS = 4V L TC6101HV: Supply Current vs Supply Voltage SUPPL Y VOL TAGE (V) SUPPL Y CURRENT (μA) 600 500 400 300 200 100

6101 G22

6010 3020 40 80 9050 70 100 –40°C 0°C 85°C 125°C VIN = 0 RIN = 1M 70°C 25°C

TYPICAL PERFORMANCE CHARACTERISTICS FREQUENCY (Hz) PSRR (dB) 0.1 1 10 100 1k 10k 100k 1M

6101 G19

RIN = 100 ROUT = 10k COUT = 5pF GAIN = 100 I OUTDC = 100μA VINAC = 50mVp L TC6101HV , V + = 5V L TC6101, L TC6101HV , V + = 12V L TC6101, V+ = 4V V+-100mV TIME (10μs/DIV)

6101 G14

CLOAD = 1000pF CLOAD = 10pF VSENSE TA = 25°C V+ = 12V RIN = 100 ROUT = 5k VSENSE + = V+ V+-100mV TIME (100μs/DIV)

6101 G15

TA = 25°C V+ = 12V CLOAD = 2200pF RIN = 100 ROUT = 5k VSENSE + = V+ 5.5V 0.5V TIME (500ns/DIV)

6101 G16

ΔVSENSE – =100mV IOUT = 100μA IOUT = 0 TA = 25°C V+ = 12V RIN = 100 ROUT = 5k VSENSE + = V+ 5.5V 0.5V TIME (500ns/DIV)

6101 G17

ΔVSENSE – =100mV IOUT = 100μ IOUT = 0 TA = 25°C V+ = 12V RIN = 100 ROUT = 5k VSENSE + = V+ Step Response Falling Edge Step Response 100mV Step Response 100mV Step Response Rising Edge PSRR vs Frequency

proportional to the sense voltage into an external resistor . developed across the external RSENSE (Figure 1). resistor , either directly or through a resistor . so it will fl ow through an internal MOSFET to the output pin. Figure 1. L TC6101/L TC6101HV Block Diagram and Typical Connection

Figure 2. Kelvin Input Connection Preserves

6101 F02

the input dynamic range required by the measurement. may require that the maximum sense voltage be 100mV . SENSE should be no more than 50mΩ. voltage for a given load current. error equivalent to only 3mA of load current. maximum of 500mV is allowed. in measurement due to their relatively large resistances. as little as 2A fl owing through this small interconnect. illustrates the recommended method.

6101 F03b

–+ –+ 7.5k VIN 301301 VOUT ILOAD L TC6101 RSENSE LO 100m Si4465 10k CMPZ4697 7.5k VIN 1.74M 4.7k CMPT5551 40.2k 619k HIGH RANGE INDICATOR LOAD > 1.2A) VLOGIC (3.3V TO 5V) LOW CURRENT RANGE OUT 2.5V/A (VLOGIC +5V) ≤ VIN ≤ 60V 0 ≤ ILOAD ≤ 10A HIGH CURRENT RANGE OUT 250mV/A 301 301 L TC6101 RSENSE HI 10m VLOGIC BAT54C L TC1540 V+V– OUT –IN+IN V+V– OUT –IN+IN Selection of External Input Resistor , RIN The external input resistor , RIN, controls the transconduc- tance of the current sense circuit. Since IOUT = VSENSE/RIN, transconductance gm = 1/RIN. For example, if RIN = 100, then IOUT = VSENSE/100 or IOUT = 1mA for VSENSE = 100mV . RIN should be chosen to allow the required resolution while limiting the output current. At low supply voltage, I OUT may be as much as 1mA. By setting R IN such that the largest expected sense voltage gives IOUT = 1mA, then the maximum output dynamic range is available. Output dynamic range is limited by both the maximum allowed output current and the maximum allowed output voltage, as well as the minimum practical output signal. If less dynamic range is required, then R IN can be increased accordingly, reducing the max output current and power dissipation. If low sense currents must be resolved accurately in a system that has very wide dynamic range, a smaller R IN than the max current spec allows may be used if the max current is limited in another way, such as with a Schottky diode across R SENSE (Figure 3a). This will reduce the high current measurement accuracy by limiting the result, while increasing the low current measurement resolution. Figure 3b. Dual L TC6101s Allow High-Low Current Ranging LOAD DSENSE

6101 F03a

Figure 3a. Shunt Diode Limits Maximum Input Voltage to Allow Better Low Input Resolution Without Overranging This approach can be helpful in cases where occasional large burst currents may be ignored. It can also be used in a multirange confi guration where a low current circuit is added to a high current circuit (Figure 3b). Note that a comparator (L TC1540) is used to select the range, and transistor M1 limits the voltage across R SENSE LO. Care should be taken when designing the board layout for RIN, especially for small RIN values. All trace and inter- connect impedances will increase the effective RIN value, causing a gain error . In addition, internal device resistance will add approximately 0.2Ω to R IN.

rent is converted to voltage. VOUT is simply IOUT • ROUT. than the allowed maximum input range of this circuit. gain and input offset, as well as resistor matching. internal op amp. IB(–) fl ows into the negative input.

6101 F04

Figure 4. Second Input R Minimizes

If the offset current, IOS, of the L TC6101 amplifi er is 2nA, the 100 microvolt error above is reduced to 2 microvolts. Adding R IN+ as described will maximize the dynamic range of the circuit. For less sensitive designs, R IN+ is not necessary. Example: If an I SENSE range = (1A to 1mA) and (V OUT/ISENSE) = 3V/1A Then, from the Electrical Characteristics of the L TC6101, RSENSE ≈ V SENSE (max) / I SENSE (max) = 500mV/1A = 500mΩ Gain = R OUT/RIN = V OUT (max) / V SENSE (max) = 3V/500mV = 6 If the maximum output current, I OUT, is limited to 1mA, ROUT equals 3V/1mA ≈ 3.01 kΩ (1% value) and R IN = 3kΩ/6 ≈ 499Ω (1% value). The output error due to DC offset is ±900μVolts (typ) and the error due to offset current, IOS is 3k x 2nA = ±6μVolts (typical), provided RIN+ = RIN–. The maximum output error can therefore reach ±906μVolts or 0.03% (–70dB) of the output full scale. Considering the system input 60dB dynamic range (I SENSE = 1mA to 1A), the 70dB performance of the L TC6101 makes this application feasible. Output Error , E OUT, Due to the Finite DC Open Loop Gain, AOL, of the L TC6101 Amplifi er This error is inconsequential as the A OL of the L TC6101 is very large. Output Current Limitations Due to Power Dissipation The L TC6101 can deliver up to 1mA continuous current to the output pin. This current fl ows through RIN and enters the current sense amp via the IN(–) pin. The power dissipated in the L TC6101 due to the output signal is: P OUT = (V–IN – VOUT) • IOUT Since V –IN ≈ V+, POUT ≈ (V+ – VOUT) • IOUT There is also power dissipated due to the quiescent sup- ply current: P Q = IDD • V+ The total power dissipated is the output dissipation plus the quiescent dissipation: P TOTAL = POUT + PQ At maximum supply and maximum output current, the total power dissipation can exceed 100mW . This will cause signifi cant heating of the L TC6101 die. In order to prevent damage to the L TC6101, the maximum expected dissipation in each application should be calculated. This number can be multiplied by the θ JA value listed in the package section on page 2 to fi nd the maximum expected die temperature. This must not be allowed to exceed 150°C, or performance may be degraded. As an example, if an L TC6101 in the S5 package is to be run at 55V ±5V supply with 1mA output current at 80°C: P Q(MAX) = IDD(MAX) • V+(MAX) = 41.4mW P OUT(MAX) = IOUT • V+(MAX) = 60mW T RISE = θJA • PTOTAL(MAX) T MAX = TAMBIENT + TRISE T MAX must be < 150°C P TOTAL(MAX) ≈ 96mW and the max die temp will be 104°C If this same circuit must run at 125°C, the max die temp will increase to 150°C. (Note that supply current, and therefore P Q, is proportional to temperature. Refer to Typical Performance Characteristics section.) In this condition, the maximum output current should be reduced to avoid device damage. Note that the MSOP package has a larger θ JA than the S5, so additional care must be taken when operating the L TC6101A/L TC6101HVA at high temperatures and high output currents. The L TC6101HV can be used at voltages up to 105V . This additional voltage requires that more power be dissipated for a given level of current. This will further limit the allowed output current at high ambient temperatures. It is important to note that the L TC6101 has been designed to provide at least 1mA to the output when required, and can deliver more depending on the conditions. Care must be taken to limit the maximum output current by proper choice of sense resistor and, if input fault conditions exist, external clamps.

Figure 5. V+ Powered Separately from Figure 6. L TC6101 Supply Current

6101 F05

6101 F06

ence to be separate from the positive supply (Figure 5). as well as that of the load (Figure 6).

a resistor or Schottky diode (Figure 8). for the purpose of circuit protection or signal transmission. in two ways, delay and speed. more quickly, decreasing the response time at the output. voltage gain of the circuit. Figure 7. Schottky Prevents Damage During Supply Reversal Figure 8. Additional Resistor R3 Protects

6101 F07

6101 F08

100 VBATT

Bidirectional Current Sense Circuit with Separate Charge/Discharge Output L TC6101 Monitors Its Own Supply Current High-Side-Input T ransimpedance Amplifi er L O A D CHARGER –+ – + VOUT D = IDISCHARGE • RSENSE ( ) WHEN IDISCHARGE ≥ 0DISCHARGING: ROUT D RIN D VOUT C = ICHARGE • RSENSE ( ) WHEN ICHARGE ≥ 0CHARGING: ROUT C RIN C

6101 TA02

4.99k ROUT C 4.99kVOUT C RIN D 100 IDISCHARGE RSENSE ICHARGE V+V– OUT –IN+IN V+ V– OUT –IN +IN L O A D

6101 TA03

4.99k VOUT 100 VBATT RSENSE L TC6101 + VOUT = 49.9 • RSENSE (ILOAD + ISUPPL Y) ILOAD ISUPPL Y V+V– OUT –IN+IN

6101 TA04

4.75k4.75k VS LASER MONITOR PHOTODIODE CMPZ4697* (10V) 10k iPD L TC6101 VO = IPD • RL *VZ SETS PHOTODIODE BIAS VZ + 4 ≤ VS ≤ VZ + 60 V+V– OUT –IN+IN

TO μP

6101 TA06

4.99k RIN 100Ω VOUT VSENSEILOAD 4V TO 60V 1μF5V L O A D – + VOUT = • VSENSE = 49.9VSENSE ROUT RIN ADC FULL-SCALE = 2.5V 1063 VCC SCK REF+ REF– GND IN+ IN– CC FO SDD V+V– OUT –IN+IN 16-Bit Resolution Unidirectional Output into L TC2433 ADC

6101 TA07

L O A D FAUL T OFF ON 4.99k VORS 47k 100Ω 100Ω 10μF 63V 1μF 14VVLOGIC SUB85N06-5 VO = 49.9 • RS • IL FOR RS = 5mΩ, VO = 2.5V AT IL = 10A (FULL SCALE) L T1910 L TC6101 IL OUT –IN +IN Intelligent High-Side Switch with Current Monitor TYPICAL APPLICATIONS

6101 TA08

VOUT = VLOGIC – ISENSE • • N • ROUT RSENSE RIN N = OPTOISOLATOR CURRENT GAIN VS ANY OPTOISOLATOR ROUT VOUT VLOGIC V+ V– OUT –IN +IN

6101 TA09

100Ω VOUT ROUT 4.99k L O A D VOUT = • VSENSE = 49.9 VSENSE ROUT RIN M1 AND M2 ARE FQD3P50 TM 62V CMZ5944B 500V VSENSE RSENSE ISENSE DANGER! Lethal Potentials Present — Use Caution DANGER!! HIGH VOL TAGE!! V+V– OUT –IN+IN 48V Supply Current Monitor with Isolated Output with 105V Survivability Simple 500V Current Monitor TYPICAL APPLICATIONS

(Reference L TC DWG # 05-08-1660 Rev F) MSOP (MS8) 0307 REV F 0.53 ± 0.152 (.021 ± .006) SEATING PLANE 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 0.18 (.007) 0.254 (.010) 1.10 (.043) MAX 0.22 – 0.38 (.009 – .015) TYP 0.1016 ± 0.0508 (.004 ± .002) 0.86 (.034) REF 0.65 (.0256) BSC 0° – 6° TYP DETAIL “A” DETAIL “A” GAUGE PLANE 12 3 4 4.90 ± 0.152 (.193 ± .006) 8 7 6 5 3.00 ± 0.102 (.118 ± .004) (NOTE 3) 3.00 ± 0.102 (.118 ± .004) (NOTE 4) 0.52 (.0205) REF 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 PACKAGE DESCRIPTION Please refer to http://www.linear .com/designtools/packaging/ for the most recent package drawings.

1.50 – 1.75 (NOTE 4)2.80 BSC 0.30 – 0.45 TYP

5 PLCS (NOTE 3)

DATUM ‘A’ 0.09 – 0.20 (NOTE 3) S5 TSOT-23 0302 REV B PIN ONE

2.90 BSC

(NOTE 4)

0.95 BSC

1.90 BSC

0.80 – 0.90

1.00 MAX

0.01 – 0.100.20 BSC 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

3.85 MAX

0.62 MAX 0.95 REF RECOMMENDED SOLDER PAD LAYOUT PER IPC CALCULATOR 1.4 MIN2.62 REF

1.22 REF

(Reference L TC DWG # 05-08-1635) PACKAGE DESCRIPTION Please refer to http://www.linear .com/designtools/packaging/ for the most recent package drawings.

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 H 03/12 Updated Features Updated Absolute Maximum Ratings and changed Order Information Changed operating temperature range to specifi ed temperature range in Electrical Characteristics header Changed T A value in curve G02 from 45°C to 25°C 4, 5 (Revision history begins at Rev H)

Linear Technology Corporation 1630 McCarthy Blvd., Milpitas, CA 95035-7417 (408) 432-1900 ● FAX: (408) 434-0507 ● www.linear .com © LINEAR TECHNOLOGY CORPORA TION 2005 LT 0312 REV H • PRINTED IN USA RELATED PARTS PART NUMBER DESCRIPTION COMMENTS L T1636 Rail-to-Rail Input/Output, Micropower Op Amp V CM Extends 44V above VEE, 55μA Supply Current, Shutdown Function L T1637/L T1638/ L T1639 Single/Dual/Quad, Rail-to-Rail, Micropower Op Amp V CM Extends 44V above VEE, 0.4V/μs Slew Rate, >1MHz Bandwidth, <250μA Supply Current per Amplifi er L T1787/L T1787HV Precision, Bidirectional, High Side Current Sense Amplifi er 2.7V to 60V Operation, 75μV Offset, 60μA Current Draw L TC1921 Dual –48V Supply and Fuse Monitor ±200V T ransient Protection, Drives Three Optoisolators for Status L T1990 High Voltage, Gain Selectable Difference Amplifi er ±250V Common Mode, Micropower , Pin Selectable Gain = 1, 10 L T1991 Precision, Gain Selectable Difference Amplifi er 2.7V to ±18V , Micropower , Pin Selectable Gain = –13 to 14 L TC2050/L TC2051/ L TC2052 Single/Dual/Quad Zero-Drift Op Amp 3μV Offset, 30nV/°C Drift, Input Extends Down to V– L TC4150 Coulomb Counter/Battery Gas Gauge Indicates Charge Quantity and Polarity L T6100 Gain-Selectable High-Side Current Sense Amplifi er 4.1V to 48V Operation, Pin-Selectable Gain: 10, 12.5, 20, 25, 40, 50V/V TYPICAL APPLICATION L O A D CHARGER –+ – + VOUT = IDISCHARGE • RSENSE ( ) WHEN IDISCHARGE ≥ 0DISCHARGING: ROUT RIN D VOUT = ICHARGE • RSENSE ( ) WHEN ICHARGE ≥ 0CHARGING: ROUT RIN C

6101 TA05

V+V– OUT OUT –IN+IN V+ V– –IN +IN Bidirectional Current Sense Circuit with Combined Charge/Discharge Output