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.
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
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.
Schematic Diagram
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)
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.
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.
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
TPS7A4700 Ultralow-noise LDO regulators PCB, with Enable and Feedback, PSU board
Universal Power Supply with TPS7A4700 LDO VR PCB
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
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
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
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)
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
Ebay link
Any questions, comments - ready to discuss
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
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
TPS7A4700 Ultralow-noise (4µVRMS) LDO Voltage regulator with Power Supply PCB
An externally hosted image should be here but it was not working when we last tested it.
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
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
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)
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)
Great little module. On the "motherboard" power supply, you're not using snubber caps (e.g. 100n) around the diodes. Is that intentional?
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?
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?
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
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
Attachments
New power supply boards available
Single Rail PSU and KIT - 30x60mm
Dual Rail PSU and KIT - 60x60mm
Dual Polarity PSU and KIT - 60x60mm
Single Rail PSU and KIT - 30x60mm
Dual Rail PSU and KIT - 60x60mm
Dual Polarity PSU and KIT - 60x60mm
Attachments
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
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
New Negative output board available with configurable output voltage
from -3V to -18V in 1V step
Dual Polarity Power Supply with new regulator board
from -3V to -18V in 1V step
Dual Polarity Power Supply with new regulator board
Attachments
Last edited:
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
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
any plans for smaller footprint such as the one with TPS7A4700 with 3 pin output? I would buy 3pcs with 5V output, thanks...
yes, with 2 versions single out/multi out
