LT3030 Dual Low Dropout Linear Regulator Demonstration Circuit DC1855A
Demonstration circuit 1855A for the LT3030, a dual low-noise micropower LDO regulator with 750mA and 250mA outputs, 2.2V to 20V input, and selectable output voltages.
Overview
Demonstration circuit 1855A features the LT3030, a dual micropower, low noise, and low dropout (LDO) linear regulator. The board supports independent input voltages from 2.2V to 20V for each channel. Channel 1 provides a maximum output current of 750mA, while Channel 2 provides 250mA. Each channel includes jumpers to select output voltages of 1.5V, 1.8V, 2.5V, 3.3V, or 5V, with options for user-programmed values via resistor installation. The LT3030 is utilized in a 28-lead 4mm x 5mm QFN package. The circuit incorporates 22μF and 10μF ceramic output capacitors for stability and 10nF bypass capacitors for reduced output noise. Features include individual shutdown jumpers and PWRGD terminals for each channel.
Use Cases
- Microprocessor systems
- Instrumentation requiring low noise
- Battery-powered systems
- Dual rail power sequencing
Topics
Referenced Parts
LT3030EUFD
Linear Technology
IC., LT3030EUFD, QFN28EUFD-4 × 5
JMK212ABJ226M
Taiyo Yuden
CAP, X5R, 22μF, 6.3V, 20%, 0805
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| 2501-2-00-80-00-00-07-0 | Mill-Max | TESTPOINT, TURRET, .095" |
| 2SN-BK-G | Samtec | SHUNT, .079" CENTER |
| TMM-103-02-L-S | Samtec | 3 PIN, 0.079 SINGLE ROW HEADER |
| TMM-106-02-L-D | Samtec | 2 × 6, 0.079 DOUBLE ROW HEADER |
| C2012X7R1E105M | TDK | CAP, X7R, 1μF, 25V, 20%, 0805 |
| CRCW0603113KFKEA | Vishay | RES., CHIP., 113K, 1%, 1/16W, 0603 |
| CRCW0603113KFKEA | Vishay | RES., CHIP., 113k, 1%, 1/16W, 0603 |
| CRCW06031M00JNEA | Vishay | RES., 1M, 5%, 1/16W, 0603 |
| CRCW0603237KFKEA | Vishay | RES., CHIP., 237K, 1%, 1/16W, 0603 |
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| CRCW060354K9FKEA | Vishay | RES., CHIP., 54.9k, 1%, 1/16W, 0603 |
| CRCW060354K9FKEA | Vishay | RES., CHIP., 54.9K, 1%, 1/16W, 0603 |
| CRCW0603732KFKEA | Vishay | RES., CHIP., 732k, 1%, 1/16W, 0603 |
| C2012X7R1E105M | TDK | 1 2 C1, C2 CAP, X7R, 1μF, 25V, 20%, 0805 TDK C2012X7R1E105M |
| 08056D106MAT | AVX | CAP, X5R, 10μF, 6.3V, 20%, 0805 |
| LT3030EUFD | Linear Technology | IC., LT3030EUFD, QFN28EUFD-4 × 5 |
| JMK212ABJ226M | Taiyo Yuden | CAP, X5R, 22μF, 6.3V, 20%, 0805 |