LT3048 Series - Low Noise Bias Generator in 2mm × 2mm DFN

The LT®3048 series generate low noise, low ripple bias supplies from input voltages of 2.7V to 4.8V.

The LT3048 includes a boost regulator and a LDO linear regulator. The boost regulator provides power to the linear regulator.

The boost regulator output voltage is regulated to 1.1V above the LDO output, optimizing LDO ripple rejection and transient response. Fixed frequency operation and current mode control allow the use of very small inductors and results in low, predictable output ripple.

The linear regulator in the LT3048 generates a programmable output and the LT3048-XX generate fixed output voltages. High power supply ripple rejection combined with a low noise internal reference results in less than 500μVP-P output ripple and noise.

The LT3048 is available in a 8-lead 2mm × 2mm DFN package.

Features

Generates Low Noise Bias Voltage from Single Cell Li-Ion Battery
Output Current: Up to 40mA
Low Output Ripple and Noise: <500μVP-P
Boost Regulator
1MHz Operation (LT3048)
2.2MHz Operation (LT3048-XX)
Integrated Schottky Diode
Low Dropout Linear Regulator
1.235V Feedback Voltage (LT3048)
Low Noise: <120μVRMS (10Hz to 100kHz)
0.1% Load Regulation
Fixed 3.3V, 5V, 12V, 15V and Adjustable Output Options
Short-Circuit and Thermal Protection
Load Disconnect in Shutdown
Available in 2mm × 2mm DFN Package

Typical Application

Applications

Sensor Bias
Op Amp Supply

Packaging

Order Information

Part Number	Package	Temp	Price(1-99)	Price (1k)*
LT3048EDC-12#PBF	2x2 DFN-8	E	$2.36
LT3048EDC-12#TRMPBF	2x2 DFN-8	E	$2.36	$1.70
LT3048EDC-12#TRPBF	2x2 DFN-8	E	$2.36	$1.65
LT3048EDC-15#PBF	2x2 DFN-8	E	$2.36
LT3048EDC-15#TRMPBF	2x2 DFN-8	E	$2.36	$1.70
LT3048EDC-15#TRPBF	2x2 DFN-8	E	$2.36	$1.65
LT3048EDC-3.3#PBF	2x2 DFN-8	E	$2.36
LT3048EDC-3.3#TRMPBF	2x2 DFN-8	E	$2.36	$1.70
LT3048EDC-3.3#TRPBF	2x2 DFN-8	E	$2.36	$1.65
LT3048EDC-5#PBF	2x2 DFN-8	E	$2.36
LT3048EDC-5#TRMPBF	2x2 DFN-8	E	$2.36	$1.70
LT3048EDC-5#TRPBF	2x2 DFN-8	E	$2.36	$1.65
LT3048EDC#PBF	2x2 DFN-8	E	$2.36
LT3048EDC#TRMPBF	2x2 DFN-8	E	$2.36	$1.70
LT3048EDC#TRPBF	2x2 DFN-8	E	$2.36	$1.65
LT3048IDC-12#PBF	2x2 DFN-8	I	$2.59
LT3048IDC-12#TRMPBF	2x2 DFN-8	I	$2.59	$1.87
LT3048IDC-12#TRPBF	2x2 DFN-8	I	$2.59	$1.82
LT3048IDC-15#PBF	2x2 DFN-8	I	$2.59
LT3048IDC-15#TRMPBF	2x2 DFN-8	I	$2.59	$1.87
LT3048IDC-15#TRPBF	2x2 DFN-8	I	$2.59	$1.82
LT3048IDC-3.3#PBF	2x2 DFN-8	I	$2.59
LT3048IDC-3.3#TRMPBF	2x2 DFN-8	I	$2.59	$1.87
LT3048IDC-3.3#TRPBF	2x2 DFN-8	I	$2.59	$1.82
LT3048IDC-5#PBF	2x2 DFN-8	I	$2.59
LT3048IDC-5#TRMPBF	2x2 DFN-8	I	$2.59	$1.87
LT3048IDC-5#TRPBF	2x2 DFN-8	I	$2.59	$1.82
LT3048IDC#PBF	2x2 DFN-8	I	$2.59
LT3048IDC#TRMPBF	2x2 DFN-8	I	$2.59	$1.87
LT3048IDC#TRPBF	2x2 DFN-8	I	$2.59	$1.82

Demo Boards

Part Number	Description	Price
DC2120A	LT3048-15 Demo Board \| Boost with Integrated Schottky and Post-Regulator LDO, 2.7V ≤ VIN ≤ 4.8V, 15Vout @ up to 35mA	Contact Factory
DC2258A	LT3048 Demo Board \|Boost, Integrated Schottky and Post-Regulator LDO, 2.7V ≤ VIN ≤ 4.8V, Vout = 20V @ up to 25mA	Contact Factory