Datasheet LT3074 (Analog Devices) - 5

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Data Sheet LT3074
(All typical specifications are at TJ (junction temperature). = 25°C and all min. and max. specifications are across the entire operating temperature range, unless otherwise noted. COUT = 22µF, CSETCAP = 4.7µF, CBIASAF = 2.2µF, and CBIASDF = 0.47µF, unless otherwise noted.)
PARAMETER SYMBOL CONDITIONS/COMMENTS MIN TYP MAX UNITS
V BIAS Pin Current I IN = 1.4V, VOUT = BIAS I 1.2V, V OUT = 10mA 4.7 9 mA BIAS = 2.5V V BIAS Pin Current I IN = 1.4V, VOUT = BIAS I 1.2V, V OUT = 3A 5.7 10 mA BIAS = 2.5V BIAS Pin Current in V I BIAS = VOUT +1.2V, VIN = VOUT, IOUT = 3A 5.2 11 mA Dropout
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BIAS_DO VBIAS = 5.5V, VIN = VOUT, IOUT = 3A 40 60 BIAS Pin Current in I Shutdown (Nap Mode) BIAS_NAP VBIAS = 5.5V, EN = 0V 200 µA I IMON Pin Voltage V OUT = 3A, VIN – VOUT = 0.2V 0.97 1 1.03 V IMON IOUT = 1A, VIN – VOUT = 0.2V 311.7 333.3 353.3 mV Programmable Current IOUT_OC_FAULT_LIMIT = 16’h0003 2.92 3.04 3.14 I A Limit
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LIM(P) IOUT_OC_FAULT_LIMIT = 16’h0001 0.95 1.02 1.085 Internal Current Limit
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IILIM(I) VIN =1.5V, ∆VOUT = -5%, VBIAS = 5.5V 4.5 6 A PGFB Rising 295 300 305 PGFB Pin Threshold mV Hysteresis 8 PG Low Voltage VPG_OL IPG = 200µA, VPGFB = 250mV 60 100 mV V Input High Voltage BIAS − CLKDIS Threshold 0.3 V Input Low Voltage 0.3 CLKDIS Leakage Current VCLKDIS = 5.5V 100 nA V SETCAP Pin Current I SETRES − VSETCAP ≥ 100mV (Fast Start SETCAP 2 mA Enabled) Turn On (Measured as VSETRES – 10 75 V Fast Start-Up Threshold SETCAP) mV Turn Off (Measured as VSETRES – -5 15 VSETCAP) Temperature Output T J = 25°C −5 5 °C Error
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0°C ≤ TJ ≤ 125°C −9 9 T Thermal Shutdown TSDN J Rising 168 °C Hysteresis 7 BIAS Pin Undervoltage EN = V VBIAS Rising 2.11 2.16 2.2 V BIAS, VIN = V Lock Out BIAS(UVLO) 0V, V V OUT = 0V BIAS Falling 1.96 2.02 2.06 Input-to-Output Differential Voltage VIOCAV VIOC Amplifier Gain 1 V/V Control
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Rev 0. 5 of 62 Document Outline Features Applications General Description Simplified Application Diagram Revision History Specifications Absolute Maximum Ratings Thermal Resistance Electrostatic Discharge (ESD) ESD Ratings ESD Caution Pin Configurations and Function Descriptions Typical Performance Characteristics Functional Diagrams Applications Information Output Voltage Output Sensing Stability and Output Capacitance High Vibration Environments Stability and Input Capacitance PSRR and Input Capacitance Filtering High Frequency Spikes Output Noise SETCAP Pin Capacitance: Noise, PSRR, Transient Response, and Soft-Start Fast Start Output Voltage Margining BIAS/BIASAF/BIASDF Pin Requirements BIAS Undervoltage Lockout EN/UV Function (Turning the Part ON and OFF) Power Good Indicator Programmable Power Good Current Monitor and Programmable Current Limit Output Overshoot Recovery and Active Discharge Direct Paralleling for Higher Output Current PCB Layout Considerations High Efficiency Linear Regulator – Input-to-Output Voltage Control Thermal Considerations Calculating Junction Temperature Protection Features Serial Bus Addressing Telemetry Readback Fault Reporting and the ALERT pin Bus Timeout TTIMEOUT TLOW:SEXT TLOW:MEXT PMBus Command Details PAGE OPERATION ON_OFF_CONFIG CLEAR_FAULTS WRITE_PROTECT CAPABILITY VOUT_MODE VOUT_OV_WARN_LIMIT VOUT_UV_WARN_LIMIT IOUT_OC_FAULT_LIMIT IOUT_OC_FAULT_RESPONSE OT_WARN_LIMIT VIN_OV_WARN_LIMIT VIN_UV_WARN_LIMIT STATUS_BYTE STATUS_WORD STATUS_VOUT STATUS_IOUT STATUS_INPUT STATUS_TEMPERATURE STATUS_CML STATUS_MFR_SPECIFIC READ_VIN READ_VOUT READ_IOUT READ_TEMPERATURE_1 PMBUS_REVISION IC_DEVICE_ID IC_DEVICE_REV MFR_MARGIN MFR_READ_VBIAS MFR_BIAS_OV_WARN_LIMIT MFR_BIAS_UV_WARN_LIMIT MFR_IOUT_MIN_WARN_LIMIT MFR_SPECIAL_ID MFR_DEFAULT_CONFIG MFR_RAIL_ADDRESS MFR_RESET Typical Application Circuits Outline Dimensions Ordering Guide Evaluation Boards Related Parts