• These commercial threads are for private transactions. diyAudio.com provides these forums for the convenience of our members, but makes no warranty nor assumes any responsibility. We do not vet any members, use of this facility is at your own risk. Customers can post any issues in those threads as long as it is done in a civil manner. All diyAudio rules about conduct apply and will be enforced.

TPS7A4700 Ultralow-noise LDO regulators PCB, 5/3PINs with Enable and Feedback inputs

Status
This old topic is closed. If you want to reopen this topic, contact a moderator using the "Report Post" button.
Ultralow-noise (4 µVRMS) low-dropout linear regulators (LDO) 5/3PINs with Enable and Feedback input PINs, 15x25mm. Replacement for LM78xx TO-220 package (in 3PIN Mode)

Presenting new PCB with TPS7A4700 Ultra Low Noise Low Drop Out Voltage Regulator. The idea to build PCB adapter for TPS7A4700 QFN Package with 78xx Pin Compatible Layout is not new, but only few of them allow you to utilize all advanced features of TPS7A4700.

An externally hosted image should be here but it was not working when we last tested it.
An externally hosted image should be here but it was not working when we last tested it.
An externally hosted image should be here but it was not working when we last tested it.
An externally hosted image should be here but it was not working when we last tested it.
An externally hosted image should be here but it was not working when we last tested it.

Features
• Input Voltage Range : +3 VDC to +25 VDC
• Output Voltage Noise : 4 μVRMS (10 Hz, 100 kHz)
• Power-Supply Ripple Rejection:
– 82 dB (100 Hz)
– ≥ 55 dB (10 Hz, 10 MHz)
• ANY-OUT™ Voltage Modes:
– User-Programmable Output via Solder pads (fig. 2a)
– Output Voltage Range: +1.4 V to +20.5 V (in 0.1V step)
• Output Current: 1 A
• Dropout Voltage: 307 mV at 1 A
• CMOS Logic Level-Compatible Enable Pin, if enable is not required, tie EN to IN. (“EN” Solder Pad, fig. 2b)
Sense/FB Pin - This pin must be connected to OUT, can be connected to the point of load to maximize accuracy, tie FB/Sense to OUT if external connection not used by “FB” Solder Pad (fig. 2c)
• Built-In Fixed Current Limit and Thermal Shutdown
• PCB size: 25.4x15mm (approx. 1.0”x0.6”)
– Vertical or Horizontal mount, compatible with most of the TO-220 package footprints
• Operating Temperature Range:–40°C to 125°C
An externally hosted image should be here but it was not working when we last tested it.
PCB Mounting Options
Can be mounted vertically (use angled headers) or horizontally (use straight headers), compatible with most of the TO-220 horizontal footprints due to oval shaped mounting hole.

Heatsinks
It is important to use sufficient heatsinks, the dispatched power can be calculated P=(Vin-Vout)*I. Back side of the PCB does not have any traces – only output pads and DC grounded copper pour. Heatsink can be attached directly to PCB if input/output pads not covered by it. Oval shape of the mounting hole also allows most of the standard heatsinks to be used safely without any modification.

An externally hosted image should be here but it was not working when we last tested it.
An externally hosted image should be here but it was not working when we last tested it.
An externally hosted image should be here but it was not working when we last tested it.
An externally hosted image should be here but it was not working when we last tested it.

Schematic Diagram

An externally hosted image should be here but it was not working when we last tested it.
BOM (Bill of Materials)
TPS7A4700 x1: IC, Low Noise Power Solution, Texas instruments – United States
GRM31CR71E106KA12L x5: Cap Ceramic 10uF 25V X7R 10% SMD1206, Murata – Japan
GRM31MR71E105KA01L x1: Cap Ceramic 1uF 25V X7R 10% SMD1206, Murata – Japan

It is available on Ebay for $23.95 (with free shipping)
 

Attachments

  • PCB1.jpg
    PCB1.jpg
    80.3 KB · Views: 935
  • SM2.jpg
    SM2.jpg
    86.5 KB · Views: 512
  • SM2_.jpg
    SM2_.jpg
    86.7 KB · Views: 383
  • SM1_.jpg
    SM1_.jpg
    97.8 KB · Views: 352
  • SM1.jpg
    SM1.jpg
    85.9 KB · Views: 378
  • PCBPIN.jpg
    PCBPIN.jpg
    207.4 KB · Views: 332
  • PCBBC.jpg
    PCBBC.jpg
    86 KB · Views: 840
  • PCBFR.jpg
    PCBFR.jpg
    106.4 KB · Views: 895
  • DIMS.jpg
    DIMS.jpg
    206.7 KB · Views: 940
  • PCB2.jpg
    PCB2.jpg
    108.4 KB · Views: 929
TPS7A4700 Ultralow-noise LDO regulators PCB, with Enable and Feedback, PSU board

Universal Power Supply with TPS7A4700 LDO VR PCB

An externally hosted image should be here but it was not working when we last tested it.


An externally hosted image should be here but it was not working when we last tested it.


Features

• Input Voltage Range : +3 VDC to +25 VDC, 3VAC to 18VAC
• Output Voltage Noise : 4 μVRMS (10 Hz, 100 kHz)
• Power-Supply Ripple Rejection:
– 82 dB (100 Hz)
– ≥ 55 dB (10 Hz, 10 MHz)
• ANY-OUT™ Voltage Modes:
– User-Programmable Output via Solder pads on LDOVR PCB
– Output Voltage Range: +1.4 V to +20.5 V (in 0.1V step)
• Output Current: 1 A
• Dropout Voltage: 307 mV at 1 A
• CMOS Logic Level-Compatible Enable Pin, if enable is not required, tie EN to Vin (J3)
• Sense Pin - This pin must be connected to OUT, can be connected to the point of load to maximize accuracy, tie S+ to V+ if external connection not used (J5)
• Built-In Fixed Current Limit and Thermal Shutdown
• PCB size: 25x75mm (approx. 1.0”x3.0”)
• Operating Temperature Range:–40°C to 125°C

Reversible PCB, the components can be mounted on any sides depending on your requirements, but pay special attention to the components’ polarities: diodes, electrolytic and tantalum capacitors (if installed) and LDO VR Board should be mounted according to the polarity marks.
Below are some samples for various options of LDO VR PCB Mount:

A) Vertical Mount with extruded Heatsink

An externally hosted image should be here but it was not working when we last tested it.
An externally hosted image should be here but it was not working when we last tested it.


Place all components on Side A, attach angled headers to the front side of LDOVR PCB, use slot B to place LDO VR Board to PSU. Ensure that square shaped pad on LDOVR (EN) corresponds to the same shaped pad on PSU Board (marked by a small dot). Max diameter for Electrolytic Capacitor is 18mm.

B) Vertical Mount with U-shaped Folded Heatsink

An externally hosted image should be here but it was not working when we last tested it.
An externally hosted image should be here but it was not working when we last tested it.


Place all components on Side B, attach angled headers to the front side of LDOVR PCB, use slot B to place LDO VR Board to PSU. Ensure that square shaped pad on LDOVR (EN) corresponds to the same shaped pad on PSU Board (marked by a small dot). Max diameter for Electrolytic Capacitor is 18mm.

C) Horizontal Mount with folded fins heatsink for low power dissipation operation: (Vin-Vout)*Iout<1.2W
An externally hosted image should be here but it was not working when we last tested it.
An externally hosted image should be here but it was not working when we last tested it.


Mount on Side A, attach straight headers to the back side of LDOVR PCB, use slot A (follow above instructions). Max diameter for Electrolytic Capacitor is 12mm.

D) Horizontal mount with Heatbridge (to use equipment case as a heatsink)

An externally hosted image should be here but it was not working when we last tested it.
An externally hosted image should be here but it was not working when we last tested it.


Mount all components except LDOVR PCB on Side A, attach straight headers to the front side of LDOVR PCB, use slot A on Side B for LDOVR PCB mount, place M3 x 2.5mm spacer between PSU and LDOVR Boards, then attach heatbridge. Max diameter for Electrolytic Capacitor is 18mm.

Dimensions

An externally hosted image should be here but it was not working when we last tested it.


Ebay link

Any questions, comments - ready to discuss
 

Attachments

  • psu4_4.jpg
    psu4_4.jpg
    508.2 KB · Views: 216
  • psu4_1.jpg
    psu4_1.jpg
    666.6 KB · Views: 233
  • psu3_2.jpg
    psu3_2.jpg
    533.5 KB · Views: 209
  • psu3_1.jpg
    psu3_1.jpg
    652.9 KB · Views: 263
  • psu2_2.jpg
    psu2_2.jpg
    459.5 KB · Views: 171
  • psu2_1.jpg
    psu2_1.jpg
    747.7 KB · Views: 202
  • psu1_2.jpg
    psu1_2.jpg
    656.7 KB · Views: 226
  • psu1_1.jpg
    psu1_1.jpg
    575.2 KB · Views: 268
  • PSU_SideB.jpg
    PSU_SideB.jpg
    246.9 KB · Views: 211
  • PSU_SideA.jpg
    PSU_SideA.jpg
    233 KB · Views: 256
TI TPS7A4700 Ultralow-noise (4µVRMS) low-dropout linear regulators 5/3PIN config

Relisted on Ebay with new features

2oz/ft^2 FR4 PCB and new thermal vias pattern to maximize thermal performance

Ultralow-noise (4 µVRMS) low-dropout linear regulators (LDO) 5/3PINs


Please don't hesitate to contact if any questions, also we will get similar board with TPS7A3301 VR for Negative output (-3.3/-5/-9V or -12/-15-/-18V user switchable)
 

Attachments

  • LDOVR_N_V20-2016.jpg
    LDOVR_N_V20-2016.jpg
    787.2 KB · Views: 249
  • LDOVR_N_V20-2015.jpg
    LDOVR_N_V20-2015.jpg
    911.3 KB · Views: 172
  • LDOVR_N_V20-2011.jpg
    LDOVR_N_V20-2011.jpg
    228.1 KB · Views: 204
  • LDOVR_N_V20-2005.jpg
    LDOVR_N_V20-2005.jpg
    633.4 KB · Views: 135
  • LDOVR_N_V20-2003.jpg
    LDOVR_N_V20-2003.jpg
    525.4 KB · Views: 180

Attachments

  • DualPolKitilKit-4845-360.jpg
    DualPolKitilKit-4845-360.jpg
    62.3 KB · Views: 171
  • DualPol-4792-360.jpg
    DualPol-4792-360.jpg
    65.3 KB · Views: 168
  • DualRail-4843-360.jpg
    DualRail-4843-360.jpg
    63 KB · Views: 182
  • DualRail-4809-360.jpg
    DualRail-4809-360.jpg
    63.1 KB · Views: 185
  • SigleRailKit-4840-360.jpg
    SigleRailKit-4840-360.jpg
    56.7 KB · Views: 154
  • LDOVRMAY2016-4789_360.jpg
    LDOVRMAY2016-4789_360.jpg
    52.6 KB · Views: 199
Recent improvement for Single Rail, Dual Rail and Dual Polarity power supplies

Panasonic EEU-FC1E562 Capacitor5600uF 25V 20% (18 X 40mm)
AAVID THERMALLOY 530613B00000G HeatSink (Thermal Resistance: 16.70C/W)
WIMA SMD-PET DECOUPLING CAP 0.1uF (0.1µF 0,1uF 100nF) 63V
RC Snubber
Free international shipping by Emirates Post Registered Mail (with tracking)

Please visit our EBAY STORE

An externally hosted image should be here but it was not working when we last tested it.
 

Attachments

  • PSU_AAVID-5006.jpg
    PSU_AAVID-5006.jpg
    331.2 KB · Views: 728
  • PSU_DUALPOL-5092.jpg
    PSU_DUALPOL-5092.jpg
    415.5 KB · Views: 759
  • PSU_DUALRAIL-5113.jpg
    PSU_DUALRAIL-5113.jpg
    363.6 KB · Views: 796
NEW LT3045 Voltage Regulator (DC/DC)

Two versions can be ordered

1. Multiple Output Voltage (programmed by PINs)
Output Voltage from 1 to 15V (in 1V step) and 0.3V can be added to any "whole number" out (means 0.3V, 1.3V, 2.3V etc)
2. Single output resistor (most of standard values available)
Vout = R(in KOhms)/10
 

Attachments

  • LT3045-5655-1200.png
    LT3045-5655-1200.png
    879.1 KB · Views: 200
  • LT3045-5652-1200.jpg
    LT3045-5652-1200.jpg
    100.6 KB · Views: 281
  • LT3045-5647-1200.png
    LT3045-5647-1200.png
    648.2 KB · Views: 307
Status
This old topic is closed. If you want to reopen this topic, contact a moderator using the "Report Post" button.