LT3070-1 Series

5A, Low Noise, Programmable Output, 85mV Dropout Linear Regulator

Catalog

5A, Low Noise, Programmable Output, 85mV Dropout Linear Regulator

Part	Control Features	Output Type	Voltage - Output (Max) [Max]	Operating Temperature [Max]	Operating Temperature [Min]	Voltage - Output (Min/Fixed)	Voltage Dropout (Max) [Max]	Current - Supply (Max) [Max]	Protection Features	Voltage - Input (Max) [Max]	Package / Case	Number of Regulators	Current - Quiescent (Iq)	Current - Output	PSRR	Mounting Type	Supplier Device Package	Output Configuration
Analog Devices LT3070EUFD-1#PBF	Enable Power Good Soft Start	Programmable	1.8 V	125 °C	-40 °C	0.8 V	0.15 V	2.3 mA	Over Current Over Temperature Reverse Polarity Under Voltage Lockout (UVLO)	3 V	28-WFQFN Exposed Pad	1	1.8 mA	5 A	66 dB	Surface Mount	28-QFN (4x5)	Positive
Analog Devices LT3070MPUFD#TRPBF	Enable Power Good Soft Start	Programmable	1.8 V	125 °C	-55 °C	0.8 V	0.15 V	10 mA	Over Current Over Temperature Reverse Polarity Under Voltage Lockout (UVLO)	3 V	28-WFQFN Exposed Pad	1	1.5 mA	5 A	66 dB	Surface Mount	28-QFN (4x5)	Positive
Analog Devices LT3070EUFD-1#TRPBF	Enable Power Good Soft Start	Programmable	1.8 V	125 °C	-40 °C	0.8 V	0.15 V	2.3 mA	Over Current Over Temperature Reverse Polarity Under Voltage Lockout (UVLO)	3 V	28-WFQFN Exposed Pad	1	1.8 mA	5 A	66 dB	Surface Mount	28-QFN (4x5)	Positive
Analog Devices LT3070IUFD#PBF	Enable Power Good Soft Start	Programmable	1.8 V	125 °C	-40 °C	0.8 V	0.15 V	10 mA	Over Current Over Temperature Reverse Polarity Under Voltage Lockout (UVLO)	3 V	28-WFQFN Exposed Pad	1	1.5 mA	5 A	66 dB	Surface Mount	28-QFN (4x5)	Positive

Catalog

5A, Low Noise, Programmable Output, 85mV Dropout Linear Regulator

Key Features

• Output Current: 5A

• Dropout Voltage: 85mV Typical

• Enable Function Soft-Starts the Reference

• Digitally Programmable VOUT: 0.8V to 1.8V

• Digital Output Margining: ±1%, ±3% or ±5%

• Low Output Noise: 25μVRMS(10Hz to 100kHz)

• Parallel Multiple Devices for 10A or More

• Precision Current Limit: ±20%

• ±1% Accuracy Over Line, Load and Temperature

• Stable with Low ESR Ceramic Output Capacitors (15μF Minimum)

• High Frequency PSRR: 30dB at 1MHz

• VIOC Pin Controls Buck Converter to Maintain Low Power Dissipation and Optimize Efficiency

• PWRGD/UVLO/Thermal Shutdown Flag

• Current Limit with Foldback Protection

• Thermal Shutdown

• 28-Lead (4mm × 5mm × 0.75mm) QFN Package

Description

The LT3070-1 is a low voltage, Ultrafast™transient response linear regulator. The device supplies up to 5A of output current with a typical dropout voltage of 85mV. A 0.01μF reference bypass capacitor decreases output voltage noise to 25μVRMS. The LT3070-1 EN pin controls the reference soft-start behavior in comparison to theLT3070which controls the reference soft-start via the BIAS pin supply voltage. The LT3070-1’s high bandwidth permits the use of low ESR ceramic capacitors, saving bulk capacitance and cost. The LT3070-1’s features make it ideal for high performance FPGAs, microprocessors or sensitive communication supply applications.Output voltage is digitally selectable in 50mV increments over a 0.8V to 1.8V range. A margining function allows the user to adjust system output voltage in increments of ±1%, ±3% or ±5%. The IC incorporates a unique tracking function to control a buck regulator powering the LT3070-1’s input. This tracking function drives the buck regulator to maintain the LT3070-1’s input voltage to VOUT+ 300mV, minimizing power dissipation.Internal protection includes UVLO, reverse-current protection, precision current limiting with power foldback and thermal shutdown. The LT3070-1 regulator is available in a thermally enhanced 28-lead, 4mm × 5mm QFN package.APPLICATIONSFPGA and DSP SuppliesASIC and Microprocessor SuppliesServers and Storage DevicesPost Buck Regulation and Supply Isolation