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TPS7A4700 Ultralow-noise LDO regulators PCB, 5/3PINs with Enable and Feedback inputs
TPS7A4700 Ultralow-noise LDO regulators PCB, 5/3PINs with Enable and Feedback inputs
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Old 23rd October 2015, 10:26 AM   #1
oxothuk is offline oxothuk  United Arab Emirates
diyAudio Member
 
Join Date: Mar 2012
Location: Umm Al Quwain
Default TPS7A4700 Ultralow-noise LDO regulators PCB, 5/3PINs with Enable and Feedback inputs

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.
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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
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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.
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Schematic Diagram
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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)
Attached Images
File Type: jpg PCB1.jpg (80.3 KB, 292 views)
File Type: jpg PCB2.jpg (108.4 KB, 294 views)
File Type: jpg DIMS.jpg (206.7 KB, 294 views)
File Type: jpg PCBFR.jpg (106.4 KB, 271 views)
File Type: jpg PCBBC.jpg (86.0 KB, 224 views)
File Type: jpg PCBPIN.jpg (207.4 KB, 178 views)
File Type: jpg SM1.jpg (85.9 KB, 208 views)
File Type: jpg SM1_.jpg (97.8 KB, 198 views)
File Type: jpg SM2_.jpg (86.7 KB, 220 views)
File Type: jpg SM2.jpg (86.5 KB, 273 views)
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Old 30th October 2015, 06:47 PM   #2
oxothuk is offline oxothuk  United Arab Emirates
diyAudio Member
 
Join Date: Mar 2012
Location: Umm Al Quwain
Default TPS7A4700 Ultralow-noise LDO regulators PCB, with Enable and Feedback, PSU board

Universal Power Supply with TPS7A4700 LDO VR PCB

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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

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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

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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
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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)

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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

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Ebay link

Any questions, comments - ready to discuss
Attached Images
File Type: jpg PSU_SideA.jpg (233.0 KB, 99 views)
File Type: jpg PSU_SideB.jpg (246.9 KB, 109 views)
File Type: jpg psu1_1.jpg (575.2 KB, 143 views)
File Type: jpg psu1_2.jpg (656.7 KB, 124 views)
File Type: jpg psu2_1.jpg (747.7 KB, 84 views)
File Type: jpg psu2_2.jpg (459.5 KB, 79 views)
File Type: jpg psu3_1.jpg (652.9 KB, 110 views)
File Type: jpg psu3_2.jpg (533.5 KB, 106 views)
File Type: jpg psu4_1.jpg (666.6 KB, 103 views)
File Type: jpg psu4_4.jpg (508.2 KB, 130 views)
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Old 4th November 2015, 05:48 AM   #3
kumori is offline kumori  Europe
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Join Date: Mar 2011
Very neat. I like the 3/5-pin design
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Old 13th November 2015, 06:30 PM   #4
oxothuk is offline oxothuk  United Arab Emirates
diyAudio Member
 
Join Date: Mar 2012
Location: Umm Al Quwain
New Combo Set for fully assembled TPS7A4700 LDO VR Board and Power Supply PCB (without components) available on Ebay for $25.95

TPS7A4700 Ultralow-noise (4µVRMS) LDO Voltage regulator with Power Supply PCB

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Old 27th November 2015, 07:39 AM   #5
oxothuk is offline oxothuk  United Arab Emirates
diyAudio Member
 
Join Date: Mar 2012
Location: Umm Al Quwain
10% off Black Friday deal (valid till end of November)

TPS7A4700 Ultralow-noise (4µVRMS) low-dropout linear regulators 5/3PIN config for $21.55

TPS7A4700 Ultralow-noise (4µVRMS) low-dropout Power Supply 1.4V-20.5V, 1A for $30.55
(now shipping with 5600uF 25V 105C 18x40mm UNITED CHEMI-CON Cap Aluminum Lytic)

TPS7A4700 Ultralow-noise (4µVRMS) LDO Voltage regulator with Power Supply PCB for $22.45

Free shipping
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Old 5th January 2016, 08:07 PM   #6
oxothuk is offline oxothuk  United Arab Emirates
diyAudio Member
 
Join Date: Mar 2012
Location: Umm Al Quwain
Default 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)
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Old 6th January 2016, 11:28 AM   #7
tuck1s is offline tuck1s  United Kingdom
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Join Date: Jul 2008
Great little module. On the "motherboard" power supply, you're not using snubber caps (e.g. 100n) around the diodes. Is that intentional?
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Old 6th January 2016, 06:03 PM   #8
oxothuk is offline oxothuk  United Arab Emirates
diyAudio Member
 
Join Date: Mar 2012
Location: Umm Al Quwain
Hi
About the module, i've tried to make it compact, universal and reliable.
About snubber caps - i never seen it on DAC's PSU, can you refer to some schematic?
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Old 3rd February 2016, 06:52 PM   #9
oxothuk is offline oxothuk  United Arab Emirates
diyAudio Member
 
Join Date: Mar 2012
Location: Umm Al Quwain
Default TPS7A3301 Ultralow-noise (16µVRMS) LDO regulators

Finally, negative output regulators available on Ebay

Two types available (3-voltage output/each, user programmable)

Type A: -3.3V/-5V/-9V, 1A, 5/3PIN
Type B: -12V/-15V/-18V, 1A, 5/3PIN

Any questions welcomed

Ebay Store
Attached Images
File Type: jpg LDOVR_N_V20-2003.jpg (525.4 KB, 81 views)
File Type: jpg LDOVR_N_V20-2005.jpg (633.4 KB, 59 views)
File Type: jpg LDOVR_N_V20-2011.jpg (228.1 KB, 72 views)
File Type: jpg LDOVR_N_V20-2015.jpg (911.3 KB, 85 views)
File Type: jpg LDOVR_N_V20-2016.jpg (787.2 KB, 144 views)
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Old 6th May 2016, 04:27 PM   #10
oxothuk is offline oxothuk  United Arab Emirates
diyAudio Member
 
Join Date: Mar 2012
Location: Umm Al Quwain
New power supply boards available

Single Rail PSU and KIT - 30x60mm
Dual Rail PSU and KIT - 60x60mm
Dual Polarity PSU and KIT - 60x60mm
Attached Images
File Type: jpg LDOVRMAY2016-4789_360.jpg (52.6 KB, 124 views)
File Type: jpg SigleRailKit-4840-360.jpg (56.7 KB, 89 views)
File Type: jpg DualRail-4809-360.jpg (63.1 KB, 109 views)
File Type: jpg DualRail-4843-360.jpg (63.0 KB, 115 views)
File Type: jpg DualPol-4792-360.jpg (65.3 KB, 99 views)
File Type: jpg DualPolKitilKit-4845-360.jpg (62.3 KB, 106 views)
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