LT1970 Linear Technology, LT1970 Datasheet
LT1970
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LT1970 Summary of contents
Page 1
... Thermal shut- down and a 800mA fixed current limit protect the chip under fault conditions. The LT1970 is packaged in a 20-lead TSSOP package with a thermally conductive copper bottom plate to facilitate heat sinking. 3k ...
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... EE CC – –3V to – 30V – –30V –2.5V to –30V ORDER PART TOP VIEW NUMBER LT1970CFE 18 TSD 17 ISNK 16 ISRC – ENABLE 14 COMMON 13 VC SRC 12 VC SNK PACKAGE = (NOTE MIN TYP MAX ...
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... V < 12.5V SRC SNK OUT + = VC = 5V, 6V < < 18V SRC SNK CC + 2.5V < V < 18V 18V CC – –18V < < –2.5V EE – –18V < V < –2.5V –18V 15V I = 5mA LT1970 MIN TYP MAX UNITS 100 150 V/mV 75 V/mV 80 120 V/ V/mV 5 V/mV 1.9 2.4 V 0.8 V 1.7 2.2 V 1.0 V ...
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... Note 2: The LT1970C is guaranteed functional over the operating temperature range of – and 85 C. Note 3: The LT1970C is guaranteed to meet specified performance from The LT1970C is designed, characterized and expected to meet specified performance from – but is not tested or QA sampled at these temperatures. ...
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... G18 Slew Rate vs Temperature 2 15V S FALLING 2.0 RISING 1.5 1.0 0.5 0 –50 – 100 TEMPERATURE ( C) 1970 G24 Small-Signal Response 500ns/DIV L 1970 G41 LT1970 Phase Margin vs Supply Voltage – OUT ...
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... LT1970 W U TYPICAL PERFOR A CE CHARACTERISTICS % Overshoot vs C LOAD 15V – 100 1k 10k C (pF) LOAD 1970 G44 Low Level Current Sense Transfer Curve –5 –10 –15 –20 – 100 ...
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... can never voltage below V or damage to the circuit may result. A Schottky diode from V to +IN can provide clamping if other elements in the EE circuit can allow + below V LT1970 (V + – V –) equals 1/10 of SENSE SENSE SENSE (Pin 13). ...
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... LT1970 CTIO S VC (Pin 12): Sink Current Limit Control Voltage Input. SNK The current sink limit amplifier will activate when the + sense voltage between SENSE –1.0 • V /10. VC may be set between V VCSNK SNK and V + 6V. The transfer function between VC COMMON ...
Page 9
... Q1 and Q2 form a standard opera- tional amplifier. This amplifier has 500mA current output capability and a 3.6MHz gain bandwidth product. Most applications of the LT1970 will use this op amp in the main signal path. All conventional op amp circuit configurations are supported. Inverting, noninverting, filter, summation or nonlinear circuits may be implemented in a conven- tional manner ...
Page 10
... W U ENABLE Control The ENABLE input pin puts the LT1970 into a low supply = SENSE SENSE current, high impedance output state. The ENABLE pin ...
Page 11
... CC EE the reduced signal swing range. Heat Sinking The power dissipated in the LT1970 die must have a path to the environment. With 100 C/W thermal resistance in free air with no heat sink, the package power dissipation is limited to only 1W. The 20-pin TSSOP package with exposed copper underside is an efficient heat conductor effectively mounted board ...
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... Current Feedback Amplifier Linear Technology Corporation 12 1630 McCarthy Blvd., Milpitas, CA 95035-7417 (408) 432-1900 FAX: (408) 434-0507 V CC 15V 100 V CC ENABLE 1k +IN VC SRC V C SNK + V 100 LT1970 OUT + SENSE 100 – SENSE COMMON –IN – 2.2k 2.2k 100 V EE –15V Package 20-Lead Plastic TSSOP (4 ...