Datasheet LT3048 (Analog Devices)
| Manufacturer | Analog Devices |
| Description | Low Noise Bias Generator in 2mm × 2mm DFN |
| Pages / Page | 16 / 1 — FEATURES. DESCRIPTION. Generates Low Noise Bias Voltage from Single. … |
| Revision | B |
| File Format / Size | PDF / 1.6 Mb |
| Document Language | English |
FEATURES. DESCRIPTION. Generates Low Noise Bias Voltage from Single. Cell Li-Ion Battery. Output Current: Up to 40mA
Model Line for this Datasheet
- LT3048EDC#TRMPBF LT3048EDC#TRPBF LT3048EDC-12#TRMPBF LT3048EDC-12#TRPBF LT3048EDC-15#TRMPBF LT3048EDC-15#TRPBF LT3048EDC-3.3#TRMPBF LT3048EDC-3.3#TRPBF LT3048EDC-5#TRMPBF LT3048EDC-5#TRPBF LT3048IDC#TRMPBF LT3048IDC#TRPBF LT3048IDC-12#TRMPBF LT3048IDC-12#TRPBF LT3048IDC-15#TRMPBF LT3048IDC-15#TRPBF LT3048IDC-3.3#TRMPBF LT3048IDC-3.3#TRPBF LT3048IDC-5#TRMPBF LT3048IDC-5#TRPBF
Text Version of Document
LT3048 Series Low Noise Bias Generator in 2mm × 2mm DFN
FEATURES DESCRIPTION
n
Generates Low Noise Bias Voltage from Single
The LT®3048 series generate low noise, low ripple bias
Cell Li-Ion Battery
supplies from input voltages of 2.7V to 4.8V. n
Output Current: Up to 40mA
The LT3048 includes a boost regulator and a LDO linear n
Low Output Ripple and Noise: <500µVP-P
regulator. The boost regulator provides power to the n
Boost Regulator
linear regulator. n
1MHz Operation (LT3048)
n The boost regulator output voltage is regulated to 1.1V
2.2MHz Operation (LT3048-XX)
n above the LDO output, optimizing LDO ripple rejection and
Integrated Schottky Diode
n transient response. Fixed frequency operation and current Low Dropout Linear Regulator n mode control allow the use of very small inductors and 1.235V Feedback Voltage (LT3048) n results in low, predictable output ripple. Low Noise: <120µVRMS (10Hz to 100kHz) n 0.1% Load Regulation The linear regulator in the LT3048 generates a program- n Fixed 3.3V, 5V, 12V, 15V and Adjustable Output Options mable output and the LT3048-XX generate fixed output n Short-Circuit and Thermal Protection voltages. High power supply ripple rejection combined n Load Disconnect in Shutdown with a low noise internal reference results in less than n Available in 2mm × 2mm DFN Package 500µVP-P output ripple and noise. The LT3048 is available in a 8-lead 2mm × 2mm DFN package.
APPLICATIONS
All registered trademarks and trademarks are the property of their respective owners. n Sensor Bias n Op Amp Supply
TYPICAL APPLICATION Efficiency
10µH 80 IN 2.7V TO 4.8V 4.7µF 70 SW BSTOUT 60 VIN LDOIN 1µF LT3048-15 50 OUT LDOOUT 15V 40 1nF 1µF OFF ON EN BYP
VIN (V) IOUT (mA)
LDOOUT = 15V GND 2.7 19 EFFICIENCY (%) 30 3.3 22 L = 10µH 3048 TA01a 3.6 24 20 DCR = 650mΩ VIN = 2.7V 10 VIN = 3.3V VIN = 3.6V 0 0 5 10 15 20 25 LOAD CURRENT (mA) 3048 TA01b Rev B For more information www.analog.com 1 Document Outline Features Applications Typical Application Description Absolute Maximum Ratings Pin Configuration Order Information Electrical Characteristics Typical Performance Characteristics Pin Functions LT3048 LT3048-xx LT3048 Block Diagrams Operation Applications Information Package Description Revision History Related Parts
FEATURES DESCRIPTION
n
Generates Low Noise Bias Voltage from Single
The LT®3048 series generate low noise, low ripple bias
Cell Li-Ion Battery
supplies from input voltages of 2.7V to 4.8V. n
Output Current: Up to 40mA
The LT3048 includes a boost regulator and a LDO linear n
Low Output Ripple and Noise: <500µVP-P
regulator. The boost regulator provides power to the n
Boost Regulator
linear regulator. n
1MHz Operation (LT3048)
n The boost regulator output voltage is regulated to 1.1V
2.2MHz Operation (LT3048-XX)
n above the LDO output, optimizing LDO ripple rejection and
Integrated Schottky Diode
n transient response. Fixed frequency operation and current Low Dropout Linear Regulator n mode control allow the use of very small inductors and 1.235V Feedback Voltage (LT3048) n results in low, predictable output ripple. Low Noise: <120µVRMS (10Hz to 100kHz) n 0.1% Load Regulation The linear regulator in the LT3048 generates a program- n Fixed 3.3V, 5V, 12V, 15V and Adjustable Output Options mable output and the LT3048-XX generate fixed output n Short-Circuit and Thermal Protection voltages. High power supply ripple rejection combined n Load Disconnect in Shutdown with a low noise internal reference results in less than n Available in 2mm × 2mm DFN Package 500µVP-P output ripple and noise. The LT3048 is available in a 8-lead 2mm × 2mm DFN package.
APPLICATIONS
All registered trademarks and trademarks are the property of their respective owners. n Sensor Bias n Op Amp Supply
TYPICAL APPLICATION Efficiency
10µH 80 IN 2.7V TO 4.8V 4.7µF 70 SW BSTOUT 60 VIN LDOIN 1µF LT3048-15 50 OUT LDOOUT 15V 40 1nF 1µF OFF ON EN BYP
VIN (V) IOUT (mA)
LDOOUT = 15V GND 2.7 19 EFFICIENCY (%) 30 3.3 22 L = 10µH 3048 TA01a 3.6 24 20 DCR = 650mΩ VIN = 2.7V 10 VIN = 3.3V VIN = 3.6V 0 0 5 10 15 20 25 LOAD CURRENT (mA) 3048 TA01b Rev B For more information www.analog.com 1 Document Outline Features Applications Typical Application Description Absolute Maximum Ratings Pin Configuration Order Information Electrical Characteristics Typical Performance Characteristics Pin Functions LT3048 LT3048-xx LT3048 Block Diagrams Operation Applications Information Package Description Revision History Related Parts
