Texas Instruments TLV71733PEVM-072 Evaluation Module TLV71733PEVM-072 TLV71733PEVM-072 Datenbogen
Produktcode
TLV71733PEVM-072
Introduction
1
Introduction
The Texas Instruments TLV71733PEVM-072 evaluation module (EVM) helps design engineers to
evaluate the operation and performance of the TLV717xxP family of linear regulators for use in their own
circuit applications. This particular EVM configuration contains a single linear regulator with internal
thermal and current-limit shutdowns. The TLV717xxP linear regulator offers current foldback, which
throttles back the output current as the load resistance decreases. The TLV717xxP also has enable
(disable) circuitry and provides an active pulldown circuit to quickly discharge output loads. It is available
as an extremely small DQN package. The regulator, including external components, is capable of
delivering up to 150 mA to the load depending on the input/output power dissipation across the part. The
TLV717xxP does not require an input capacitor, and the output capacitor only needs to be
evaluate the operation and performance of the TLV717xxP family of linear regulators for use in their own
circuit applications. This particular EVM configuration contains a single linear regulator with internal
thermal and current-limit shutdowns. The TLV717xxP linear regulator offers current foldback, which
throttles back the output current as the load resistance decreases. The TLV717xxP also has enable
(disable) circuitry and provides an active pulldown circuit to quickly discharge output loads. It is available
as an extremely small DQN package. The regulator, including external components, is capable of
delivering up to 150 mA to the load depending on the input/output power dissipation across the part. The
TLV717xxP does not require an input capacitor, and the output capacitor only needs to be
≥
0.1
µ
F
(effective minimum) for stability; however, for conservative design practice accounting for widely varying
noise environments and dynamic line/load conditions, a 1-
noise environments and dynamic line/load conditions, a 1-
µ
F input and output capacitor has been used in
the design.
2
Setup
This section describes the jumpers and connectors on the EVM as well as how to properly connect, set
up, and use the TLV717xxPEVM.
up, and use the TLV717xxPEVM.
2.1
Input/Output Connectors and Jumper Descriptions
2.1.1
J1
–
VIN
J1 is the input power supply voltage connector. Twist the positive input lead and ground return lead from
the input power supply, and keep them as short as possible to minimize EMI transmission. Add additional
bulk capacitance between J1 and J2 if the supply leads are greater than 6 inches. For example, an
additional 47-
the input power supply, and keep them as short as possible to minimize EMI transmission. Add additional
bulk capacitance between J1 and J2 if the supply leads are greater than 6 inches. For example, an
additional 47-
µ
F electrolytic capacitor connected from J1 to ground can improve the transient response of
the TLV717xxP, while eliminating unwanted ringing on the input due to long-wire connections.
2.1.2
J2
–
GND
J2 is the ground-return connector for the input power supply.
2.1.3
J3
–
VOUT
J3 is the regulated output voltage connector.
2.1.4
J4
–
GND
J4 is the output ground-return connector.
2.1.5
JP1
–
EN
JP1 is the output enable. To enable the output, connect a jumper to short the ON pin 1 to the EN center
pin 2. To disable the output, connect a jumper to short EN pin 2 to OFF pin 3.
pin 2. To disable the output, connect a jumper to short EN pin 2 to OFF pin 3.
2.2
Equipment Setup
•
Turn off the input power supply after verifying that its output voltage is set to greater than 3.2 V (5.5 V
maximum). Connect the positive voltage lead from input power supply to VIN at the J1 connector of the
EVM. Connect the ground lead from the input power supply to GND at the J2 connector of the EVM.
maximum). Connect the positive voltage lead from input power supply to VIN at the J1 connector of the
EVM. Connect the ground lead from the input power supply to GND at the J2 connector of the EVM.
•
Connect a 0-mA to 150-mA load between an OUT pin at connector J4 and a GND pin at connector J3.
•
Disable the output by connecting the jumper on JP1 from the EN pin to the OFF pin.
3
Operation
•
Turn on the input power supply. For the initial operation, set the input power supply, VIN
–
J1, to 5 V.
•
Enable the output by reconnecting the jumper on JP1 from the EN pin to the ON pin.
•
Vary the respective loads and VIN voltages as necessary for test purposes.
2
TLV71733PEVM-072 Evaluation Module
SLVU553
–
October 2011
Copyright
©
2011, Texas Instruments Incorporated