Texas Instruments LP5900TL-3.3EV Evaluation Board LP5900TL-3.3EV/NOPB LP5900TL-3.3EV/NOPB 数据表
产品代码
LP5900TL-3.3EV/NOPB
User's Guide
SNVA123C – September 2005 – Revised April 2013
AN-1396 LP5900 DSBGA Evaluation Board Information
1
Introduction
This evaluation board is designed to enable the evaluation of the LP5900 voltage regulator. Each board is
assembled and tested in the factory. This evaluation board has the DSBGA-4 bump package mounted.
assembled and tested in the factory. This evaluation board has the DSBGA-4 bump package mounted.
2
General Description
The LP5900 is a linear regulator capable of suppling 150 mA output current. Designed to meet the
requirements of RF/Analog circuits, the LP5900 provides low device noise, high PSRR, low quiescent
current, and low line transient response. Using new innovative design techniques the LP5900 offers class-
leading noise performance without a noise bypass capacitor.
requirements of RF/Analog circuits, the LP5900 provides low device noise, high PSRR, low quiescent
current, and low line transient response. Using new innovative design techniques the LP5900 offers class-
leading noise performance without a noise bypass capacitor.
The device has been designed to work with 0.47 µF input and output ceramic capacitors down to 0603
component size.
component size.
3
Operation
The input voltage, applied between V
IN
and GND, should be at least 1.0 V greater than V
OUT
and no more
than 5.5 V. The minimum operating voltage is 2.5 V. Loads can be connected to V
OUT
with reference to
GND. V
OUT
and V
IN
sense pins are provided on the board to allow accurate measurements directly onto the
input and output pins of the device, eliminating any voltage drop on the PCB traces or connecting wires to
the load.
the load.
ON/OFF control is provided by a logic signal on the V
EN
pin. A minimum of 1.2 V is required at this pin to
enable the LDO. The LDO will be shutdown when the V
EN
pin is set to 0.4 V or less.
V
IN
and V
EN
can be tied together in applications where the LP5900 is operated continuously from the
battery. However, if ON/OFF control is required, the V
EN
pin should be driven from a separate signal to
ensure correct operation of the fast start-up circuit. The device has a 1M
Ω
internal resistor from V
EN
to
GND.
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1
SNVA123C – September 2005 – Revised April 2013
AN-1396 LP5900 DSBGA Evaluation Board Information
Copyright © 2005–2013, Texas Instruments Incorporated