Texas Instruments Evaluation Module for Dual, 200 mA Output, Low Noise, High PSRR, Low-Dropout Regulator TLV7101828EVM-5 TLV7101828EVM-595 Data Sheet
Product codes
TLV7101828EVM-595
Introduction
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1
Introduction
The Texas Instruments TLV7101828EVM-595 EVM helps designers evaluate the operation and
performance of the TLV710xxxx family of linear regulators for possible use in their circuit applications.
This particular integrated circuit (IC) configuration contains two separate linear regulators with separate
thermal and current-limit shutdowns, and separate enable circuitry in an extremely small, 1.5-mm x
1.5-mm package. Each channel is simultaneously capable of delivering up to 200 mA of load current
depending on thermal/layout considerations and input/output voltage drops across the part. The
TLV710xxxx does not require an input capacitor, and the output capacitor only need be 0.1 µF (effective
minimum) for stability; however, for conservative design practice accounting for widely varying noise
environments and dynamic line/load conditions, a 1-µF capacitor has been employed at the input and both
output ports.
performance of the TLV710xxxx family of linear regulators for possible use in their circuit applications.
This particular integrated circuit (IC) configuration contains two separate linear regulators with separate
thermal and current-limit shutdowns, and separate enable circuitry in an extremely small, 1.5-mm x
1.5-mm package. Each channel is simultaneously capable of delivering up to 200 mA of load current
depending on thermal/layout considerations and input/output voltage drops across the part. The
TLV710xxxx does not require an input capacitor, and the output capacitor only need be 0.1 µF (effective
minimum) for stability; however, for conservative design practice accounting for widely varying noise
environments and dynamic line/load conditions, a 1-µF capacitor has been employed at the input and both
output ports.
2
Setup
This section describes the jumpers and connectors on the EVM as well as how to properly connect, set
up, and use the TLV7101828EVM-595.
up, and use the TLV7101828EVM-595.
2.1
Input/Output Connectors and Jumper Descriptions
•
J1 (VIN) – The positive input supply voltage connector. Twist the positive input lead and ground lead,
and keep them as short as possible to minimize EMI transmission. Additional bulk capacitance must be
added between J1 and J2 if the supply leads are greater than six inches. An additional 47-µF or
greater capacitor improves the transient response of the TLV710xxxx and reduces ringing on the input
due to long wire connections.
and keep them as short as possible to minimize EMI transmission. Additional bulk capacitance must be
added between J1 and J2 if the supply leads are greater than six inches. An additional 47-µF or
greater capacitor improves the transient response of the TLV710xxxx and reduces ringing on the input
due to long wire connections.
•
J2 (GND) – Ground-return connection for the input power supply.
•
J3 (OUT 1) – Channel 1, positive voltage, output connector.
•
J4 (GND) – Channel 1, output ground-return connector.
•
J5 (OUT 2) – Channel 2, positive voltage, output connector.
•
J6 (GND) – Channel 2, output ground-return connector.
•
JP1 (EN1) – Channel 1, output enable. To enable the channel 1 output, connect a jumper to short the
VIN pin 1 to the EN1 center pin 2. To disable the channel 1 output, connect the jumper between the
EN1 center pin 2 and GND pin 3.
VIN pin 1 to the EN1 center pin 2. To disable the channel 1 output, connect the jumper between the
EN1 center pin 2 and GND pin 3.
•
JP2 (EN2) – Channel 2, output enable. To enable the channel 2 output, connect a jumper to short the
VIN pin 1 to the EN2 center pin 2. To disable the channel 1 output, connect the jumper between the
EN2 center pin 2 and GND pin 3.
VIN pin 1 to the EN2 center pin 2. To disable the channel 1 output, connect the jumper between the
EN2 center pin 2 and GND pin 3.
2.2
Soldering Guidelines
Any solder re-work to modify the EVM for the purpose of repair or other application reasons must be
performed using a hot-air system to avoid damaging the integrated circuit IC especially.
performed using a hot-air system to avoid damaging the integrated circuit IC especially.
2.3
Equipment Interconnect
•
Turn off the input power supply after verifying that its output voltage is less than 5.5 V. Connect the
positive voltage lead from input power supply to the JP1 connector of the EVM. Connect the ground
lead from the input power supply to JP2 of the EVM.
positive voltage lead from input power supply to the JP1 connector of the EVM. Connect the ground
lead from the input power supply to JP2 of the EVM.
•
Connect a 0-mA to 200-mA load between the positive output of channel 1, OUT 1 – JP3, and the
channel 1 ground connection, JP4.
channel 1 ground connection, JP4.
•
Connect a 0-mA to 200-mA load between the positive output of channel 2, OUT 2 – JP5, and the
channel 2 ground connection, JP6.
channel 2 ground connection, JP6.
•
Disable OUT 1 by jumpering JP1 – EN1 to GND.
•
Disable OUT 2 by jumpering JP2 – EN2 to GND.
3
Operation
•
Turn on the input power supply. For initial operation, it is recommended that the input power supply,
VIN – JP1, be set to 3.6 V.
VIN – JP1, be set to 3.6 V.
•
Enable OUT 1 and or OUT 2 as desired – reconnect the jumper on JP1 (and or JP2) from EN1 (EN2)
2
TLV7101828EVM-595
SLVU404 – September 2010
Copyright © 2010, Texas Instruments Incorporated