® ® INNOVATION and EXCELLENCE Single Output UNS Series Non-Isolated, 3.3V and 5V 3 Amp, DC/DC Converters Features ■ Low cost n SIP or DIP packaging n 3.3V (10W) or 5V (15W) outputs n Wide range inputs: 4.75-13.6V for 3.3V models 6-16.5V for 5V models n n n n n n n n High efficiencies, typically 90-92% Low output noise, 50mVp-p Remote on/off control 100µA "standby" input current Output current limiting EMC compliant Highly reliable, 100% SMT construction Conformally coated for harsh environments Low cost, high efficiency, wide input voltage range and low output noise define DATEL’s new UNS Series of non-isolated, step-down, switching DC/DC converters. The 3.3V- and 5V-output devices are, respectively, 90% and 92% efficient. All models are fully line and load regulated and maintain specified accuracy over the impressively wide input voltage ranges of 4.75 to 13.6 Volts for 3.3V outputs and 6 to 16.5 Volts for 5V outputs. Output ripple and noise are typically 50mVp-p. UNS devices are fabricated using proven SMT-on-pcb construction techniques. The 3.3V and 5V devices are both available in either lightweight SIP (2" x 0.4" x 0.8") or DIP (2" x 0.8" x 0.4", 600 mil spacing between rows) package configurations. The DIP option is designated by a "D" suffix added to the part number. All models are conformally coated for protection against moisture and dust. The high efficiency of the UNS Series’ fixed-frequency (190kHz) switching design eliminates the need for thermally conductive potting compound. Devices are specified for full-power operation up to ambient temperatures of +50°C. With derating, they operate up to +70°C. Calculated MTBF (MIL-HDBK-217F) is more than 1.6 million hours. These simple-to-use power converters have no minimum load requirements. They draw 1mA when unloaded and a mere 100µA in the standby mode (On/Off Control turned off). 3.3V models have an output voltage adjustment range of 2.7 to 3.3 Volts. 5V models are adjustable down to 3.0V. +VIN +VOUT +VIN +VOUT –VIN TRIM –VIN OUTPUT RETURN OUTPUT RETURN ON/OFF CONTROL PWM CONTROLLER REFERENCE & ERROR AMP Figure 1. Simplified Schematic DATEL, Inc., Mansfield, MA 02048 (USA) · Tel: (508)339-3000, (800)233-2765 Fax: (508)339-6356 · Email: [email protected] · Internet: www.datel.com This Material Copyrighted by Its Respective Manufacturer UNS Series N O N - I S O L AT E D , 1 0 a n d 1 5 W, S I N G L E O U T P U T D C / D C C O N V E R T E R S ➀ Performance Specifications and Ordering Guide Output Input  R/N (mVp-p) Typ. Max. à Regulation (Max.) Line Load IIN ➄ (mA) ±3.0% 7.5 4.75-13.6 1/1400 -- 90% ±3.0% 7.5 4.75-13.6 1/1400 -- 90% B2, P18 ±1.0% ±3.0% 12 6-16.5 1/1330 -- 92% B1, P18 ±1.0% ±3.0% 12 6-16.5 1/1330 -- 92% B2, P18 UNS-3.3/3-D5 3.3 3 50 100 ±1.0% UNS-3.3/3-D5D 3.3 3 50 100 ±1.0% UNS-5/3-D12 5 3 50 100 UNS-5/3-D12D 5 3 50 100 Á Package (Case, Pinout) Range (Volts) IOUT (Amps) Model Efficiency Min. Typ. VIN Nom. (Volts) VOUT (Volts) B1, P18 ➀ Typical at TA = +25°C under nominal line voltage and full-load conditions, unless otherwise noted. ➁ "D" suffix indicates DIP package. ➂ Ripple/Noise (R/N) measured over a 20MHz bandwidth with a 100µF external input capacitor and a 220µF external output capacitor. Additional ouput capacitors will lower R/N. See Technical Notes. ➃ Listed output regulation specifications describe the total change in output voltage as the input (line) voltage or output (load) current is varied over its full specified range. Typically, line regulation is better than ±0.5% and load regulation is better than ±1.0%. Load regulation applies for 0 to 100% load conditions. ➄ Nominal line voltage, no-load/full-load conditions. PART NUMBER STRUCTURE M E C H A N I C A L S P E C I F I C AT I O N S Case B1 (SIP) U NS - 3.3 / 3 - D5 D Output Configuration: U = Unipolar 0.03 (0.8) 1.97 (50.00) Add "D" suffix for optional DIP package configuration Input Voltage Range: D5 = 4.75-13.6 Volts (7.5V nominal) D12 = 6-16.5 Volts (12V nominal) Non-Isolated SIP packaging Nominal Output Voltage: 3.3 or 5 Volts 0.28 (7.0) 0.81 (20.50) 1 2 3 4 5 6 7 8 9 10 0.30 (7.62) Maximum Output Current in Amps 0.025 (0.64) 0.13 (3.41) 0.400 (10.16) 0.900 (22.86) 4 EQ. SP. @ 0.100 (2.54) 0.400 (10.16) 0.1 (2.5) 0.07 (1.85) 4 EQ. SP. @ 0.100 (2.54) T E M P E R AT U R E D E R AT I N G Case B2 (DIP) 0.03 (0.8) 20 16 Output Power (Watts) 0.28 (7.0) 1.97 (50.00) 18 UNS-5/3-D12 * 0.025 (0.64) * 0.81 (20.50) 14 1 2 3 4 5 0.60 (15.24) 6 7 8 9 10 12 UNS-3.3/3-D5 0.13 (3.41) 10 8 0.400 (10.16) 6 4 EQ. SP. @ 0.100 (2.54) 4 0.900 (22.86) 0.400 (10.16) 0.14 (3.5) STANDOFF 4 EQ. SP. @ 0.100 (2.54) 0.40 (10.16) * NO CONNECTION. FOR MECHANICAL STABILITY ONLY. 2 I/O Connections 0 –10 0 10 20 30 40 50 60 70 80 90 Pin 1 2 3 4 5 100 Ambient Temperature (°C) Note: Derating curves apply to both SIP and DIP package configurations This Material Copyrighted by Its Respective Manufacturer 2 Function P18 +Input +Input –Input –Input On/Off Control 0.10 (2.63) Pin 6 7 8 9 10 Function P18 Trim Output Rtn. Output Rtn. +Output +Output UNS Series N O N - I S O L AT E D , 1 0 a n d 1 5 W, S I N G L E O U T P U T D C / D C C O N V E R T E R S Typical @ TA = +25°C under nominal line voltage and full-load conditions, unless noted. ➀ Absolute Maximum Ratings Input Input Voltage Range: "D5" and "D5D" Models "D12" and "D12D" Models 4.75-13.6 Volts (7.5V nominal) 6-16.5 Volts (12V nominal) Input Voltage: "D5" Models "D12" Models 15 Volts 18 Volts Input Current See Ordering Guide Input Reverse-Polarity Protection None. See Technical Notes. Input Filter Type Capacitive Output Overvoltage Protection None Overvoltage Protection None Output Current Reverse-Polarity Protection None Current limited. Devices can withstand an output short circuit for brief durations only. Storage Temperature –25 to +85°C Lead Temperature (soldering, 10 sec.) +300°C On/Off Control (Pin 5) ➁ TTL high (or open) = on, low = off Output VOUT Accuracy ±5%, maximum Temperature Coefficient ±0.01% per °C Ripple/Noise (20MHz bandwidth) ➂ See Ordering Guide Line/Load Regulation ➃ See Ordering Guide Efficiency See Ordering Guide Current Limiting ➄ These are stress ratings. Exposure of devices to any of these conditions may adversely affect long-term reliability. Proper operation under conditions other than those listed in the Performance/Functional Specifications Table is not implied. Auto-recovery TECHNICAL NOTES Dynamic Characteristics Transient Response (50% load step) 200µsec max. to ±2% of final value Switching Frequency 190kHz Input and Output Capacitors Though UNS Series, non-isolated, DC/DC converters have on-board input and output capacitors (CIN = 6.8µF, COUT = 6.8µF), the majority of applications will require the installation of additional external I/O capacitance. Environmental Operating Temperature: Without Derating With Derating –10 to +50°C to +70°C (See Derating Curve) Storage Temperature –25 to +85°C The total input capacitance functions as a true energy-storage element, and its optimal value will vary as a function of line voltage. The selected external input capacitor should have both low ESR and low ESL because, as the power converter’s input FET switch cycles on and off, the input capacitance must have the ability to instantaneously supply pulses of relatively high current. Physical Dimensions: SIP Models DIP Models ➅ 2 x 0.41 x 0.8" (50 x 10.3 x 21mm) 2 x 0.8 x 0.44" (50 x 21 x 11.3mm) Shielding None Case Connection None Pin Material Gold-plated phosphor bronze Weight 0.35 ounces (10 grams) Rather than install a large, expensive, on-board capacitor that addresses all possible input-voltage and output-load conditions, DATEL has chosen to leave out the bulk of the input capacitance so that users may select a costeffective component appropriate to their own application. We use a low-ESR 100µF external input capacitor during production testing and have found 330µF to be a conservative value that works well in the majority of applications. ➀ UNS Series devices require external input/output capacitors to achieve rated performance. Listed specifications assume CIN = 100µF and COUT = 220µF. ➁ See Technical Notes. ➂ Output Ripple/Noise can be reduced with external capacitors. See Technical Notes. ➃ UNS Series converters have no minimum-load requirements. ➄ Current limiting initiates at approximately 5% above rated load. ➅ DIP models have a standoff which makes their total above-board height 0.44 inches. This Material Copyrighted by Its Respective Manufacturer In addition to their on-board output capacitor, UNS Series devices require the installation of additional output capacitors to achieve rated ripple/noise specifications. External output capacitors should be low-ESR tantalum or electrolytic types, and they should be located as close to the converters as possible. A minimum of 220µF is required to achieve rated ripple/noise specs. Increased capacitance will lower output noise. There are no limitations on output capacitance; however, we have found minimal noise improvements beyond 4700µF. 3 UNS Series N O N - I S O L AT E D , 1 0 a n d 1 5 W, S I N G L E O U T P U T D C / D C C O N V E R T E R S Output Trimming The On/Off Control Pin 5V devices can be trimmed down to 3.0V, and 3.3V devices can be trimmed down to 2.7V using a single external trimpot or fixed resistor. The trimpot should be connected between +VOUT (pins 9 and 10) and Trim (pin 6) as shown in the figure below. The trimpot can be used to determine the value of a single fixed resistor which can then be connected between pins 9 and 10 and 6. Fixed resistors should be metal-film types with relatively low absolute TCR’s to ensure stability. For normal operation, pin 5 should be left open. This pin has an internal 250kW pull-up resistor to +5V (or to +VIN if +VIN < 5V). For dynamic control of the converters’ on/off functionality, a TTL logic high (+2.4V minimum, +5V maximum or +VIN maximum if +VIN < 5V, 100µA max.) applied to pin 5 enables the converter, and a quasi-TTL logic low (0 to +0.5V, 100µA max.) disables the converter. Control voltages should be referenced to pins 3 and 4 (–Input). For best results, use a mechanical relay or open-collector logic. In order to maximize their efficiency, UNS devices employ high-value resistors in their voltage feedback loop. Consequently, the external trimpots must also be high-resistance devices (1-2 megohms). If the trimpots are accidentally turned to their 0W stops, it will not damage the converters; however, the output voltage will be pulled down to an unstable level. Use care not to trim the output voltage below the levels indicated in the accompanying table. When the converter is turned off, its input "standby" current will be approximately 100µA. Applying a voltage that is greater than VIN to the On/Off Control pin, or applying any voltage to this pin when no input power is applied to the converter, may cause permanent damage to the converter. TYPICAL PERFORMANCE CURVES 100 98 +OUTPUT R1 ERROR AMP RTRIM 6 R3 RLOAD Efficiency (%) 96 9, 10 TRIM 94 92 VIN = 6V 90 VIN = 12V 88 1.195V R2 86 VIN = 16.5V 7, 8 84 OUTPUT RETURN 0 0.5 1.0 1.5 2.0 2.5 3.0 5V Output Current (Amps) Figure 2. Output Voltage Trimming Efficiency vs. Output Current and Input Voltage (Model UNS-5/3) 100 Product UNS-3.3/3 UNS-5/3 VIN = 4.75V 98 Output Voltage Adjustment Range 3.0 to 5.0V R1 68.68kW 124.7kW R2 38kW 39kW R3 10kW 10kW ³160kW ³100kW RTRIM 96 Efficiency (%) 2.7 to 3.3V 94 92 90 VIN = 7.5V 88 86 VIN = 13.6V Table 1. Output Voltage Trim Values 84 0 0.5 1.0 1.5 2.0 2.5 3.0 3.3V Output Current (Amps) Efficiency vs. Output Current and Input Voltage (Model UNS-3.3/3) ® ® INNOVATION and EXCELLENCE ISO-9001 REGISTERED DATEL, Inc. 11 Cabot Boulevard, Mansfield, MA 02048-1151 Tel: (508) 339-3000 (800) 233-2765 Fax: (508) 339-6356 Internet: www.datel.com Email: [email protected] Data Sheet Fax Back: (508) 261-2857 DS-0406 9/98 DATEL (UK) LTD. Tadley, England Tel: (01256)-880444 DATEL S.A.R.L. Montigny Le Bretonneux, France Tel: 01-34-60-01-01 DATEL GmbH München, Germany Tel: 89-544334-0 DATEL KK Tokyo, Japan Tel: 3-3779-1031, Osaka Tel: 6-354-2025 DATEL makes no representation that the use of its products in the circuits described herein, or the use of other technical information contained herein, will not infringe upon existing or future patent rights. The descriptions contained herein do not imply the granting of licenses to make, use, or sell equipment constructed in accordance therewith. Specifications are subject to change without notice. The DATEL logo is a registered DATEL, Inc. trademark. This Material Copyrighted by Its Respective Manufacturer ® ® IN N O VAT IO N a n d E X C E L L E N C E NON-ISOLATED DC/DC CONVERTER SELECTION GUIDE 2.5V S I N G L E O U T P U T, N O N - I S O L A T E D Package ➀ Regulation Output Current (Amps, Max.) Input Voltage, Nominal (Range) (Volts) Dimensions (Inches) Case, Pinout Line (Max.) Load (Max.) Ripple / Noise ➁ (mVp-p) Efficiency (Min.) DATEL Model Number 2 5 (4.75-5.5) 1 x 1 x 0.45 C7A, P9 ±0.25% ±0.5% 30 83% UNR-2.5/2-D5 UNR, 5W 5 (4.75-5.5) 2 x 1 x 0.39 C5A, P9 ±0.1% ±0.5% 40 86% UNR-2.5/8-D5 UNR, 20/25W 8 10 12 20 3.3V 3 8 Data Sheet @ www.datel.com 12 (10.4-13.6) 2 x 1 x 0.48 C5C, P9 ±0.1% ±0.6% 40 85% UNR-2.5/8-D12 UNR, 20/25W 5 (4.75-5.5) 2 x 1 x 0.39 C5A, P9 ±0.1% ±0.5% 40 85% UNR-2.5/10-D5 UNR, 20/25W 12 (10.4-13.6) 5 (4.75-5.5) 5 (4.5-5.5) 2 x 1 x 0.48 2 x 1 x 0.44 2 x 2 x 0.49 C5C, P9 C5B, P9 C21, P26 ±0.1% ±0.1% ±0.1% ±0.6% ±0.5% ±1.0% 40 40 60 83% 84% 85% UNR-2.5/10-D12 UNR-2.5/12-D5 UNR-2.5/20-D5 ➂ UNR, 20/25W UNR, 30W Contact DATEL 86% 90% ➅ 90% ➅ 87% 88% UNR-3.3/3-D5 UNS-3.3/3-D5 UNS-3.3/3-D5D UNR-3.3/3-D12 UNR-3.3/8-D5 UNR, 10W UNS, 10/15W UNS, 10/15W UNR, 10W UNR, 26/33W S I N G L E O U T P U T, N O N - I S O L A T E D 5 (4.75-5.5) 7.5 (4.75-13.6) 7.5 (4.75-13.6) 12 (10.4-13.6) 5 (4.75-5.5) 1 x 1 x 0.45 2 x 0.4 x 0.8 ➃ 2 x 0.8 x 0.4 ➄ 1 x 1 x 0.45 2 x 1 x 0.39 C7A, P9 B1, P18 B2, P18 C7A, P9 C5A, P9 ±0.4% ±1.0% ±1.0% ±0.25% ±0.1% ±0.5% ±3.0% ±3.0% ±0.5% ±0.5% 30 50 50 100 40 5 (4.75-5.5) 2 x 1 x 0.39 C16A, P23 ±0.1% ±0.5% 40 88% UNR-3.3/8-D5T ➂ ➇ Contact DATEL 5 (4.75-5.5) 12 (10.4-13.6) 2 x 0.4 x 0.53 ➈ 2 x 1 x 0.48 B3, P27 C5C, P9 ±0.1% ±0.1% ±0.5% ±0.6% 40 60 88% 86% USN-3.3/8-D5 ➂ UNR-3.3/8-D12 Contact DATEL UNR, 26/33W 12 (10.4-13.6) 5 (4.75-5.5) 2 x 1 x 0.48 2 x 1 x 0.39 C16C, P23 C5A, P9 ±0.1% ±0.1% ±0.6% ±0.5% 60 40 86% 86% UNR-3.3/8-D12T ➂ ➇ UNR-3.3/10-D5 Contact DATEL UNR, 26/33W 5 (4.75-5.5) 2 x 1 x 0.39 C16A, P23 ±0.1% ±0.5% 40 86% UNR-3.3/10-D5T ➂ ➇ Contact DATEL 5 (4.75-5.5) 12 (10.4-13.6) 2 x 0.4 x 0.53 ➈ 2 x 1 x 0.48 B3, P27 C5C, P9 ±0.1% ±0.1% ±0.5% ±0.6% 40 60 86% 85% USN-3.3/10-D5 ➂ UNR-3.3/10-D12 Contact DATEL UNR, 26/33W 12 12 (10.4-13.6) 5 (4.75-5.5) 2 x 1 x 0.48 2 x 1 x 0.44 C16C, P23 C5B, P9 ±0.1% ±0.1% ±0.6% ±0.5% 60 40 85% 87% UNR-3.3/10-D12T ➂ ➇ UNR-3.3/12-D5 Contact DATEL UNR, 40W 20 5 (4.5-5.5) 2 x 2 x 0.49 C21, P26 ±0.1% ±1.0% 50 87% UNR-3.3/20-D5 ➂ Contact DATEL 92% ➅ 92% ➅ 87% UNS-5/3-D12 UNS-5/3-D12D UNR-5/5-D12 UNS, 10/15W UNS, 10/15W UNR, 25W 10 5V 3 5➆ S I N G L E O U T P U T, N O N - I S O L A T E D 12 (6-16.5) 12 (6-16.5) 12 (10.4-13.6) 2 x 0.4 x 0.8 ➃ 2 x 0.8 x 0.4 ➄ 2 x 1 x 0.48 B1, P18 B2, P18 C13, P21 ±1.0% ±1.0% ±0.25% ±3.0% ±3.0% ±0.5% 50 50 60 Listed specifications are typical at TA = +25°C under nominal line voltage and full-load conditions, unless noted. ➀ See individual product data sheets for mechanical specifications and pinouts. ➁ Ripple/Noise is specified over a 20MHz bandwidth. ➂ Listed specifications for these products are preliminary. ➃ 10-pin SIP package. ➄ 10-pin DIP package. ➅ Listed specification is a typical. ➆ Output voltage is user adjustable from 3.3 to 6V. ➇ Output voltage is user adjustable from 1.4 to 3.6V. ➈ Industry-standard, 11-pin SIP package. Data sheet fax back: (508)261-2857 • Visit us on the internet: www.datel.com DATEL, Inc., Mansfield, MA, USA • Tel: (508)339-3000, (800)233-2765 • Fax: (508)339-6356 • Email: [email protected] Rev. C This Material Copyrighted by Its Respective Manufacturer 6/99