BM1084

BM1084 BOOKLY | Alldatasheet

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Technical content

BOOKLY MICRO ELECTRONIC LIMITED CORP. GENERAL DESCRIPTION The BM1084 series of adjustable and fixed voltage regulators are designed to provide 5A output current and to operate down to 1V input-to-output differential. The dr opout voltage of the device is guaranteed maximum 1.5V at maximum output current, decreasing at lower load currents. On-chip trimming adjusts the reference voltage to 1% . Current limit is also trimmed, minimizing the stress under overload conditions on both the regulator and power source circuitry. The BM1084 devices are pin compatible with older th ree-terminal regulators and are offered in 3 lead TO-220-2 lead TO-252 package and 2 lead TO-263 (Plastic DD). F E A T U R E S A P P L I C A T I O N S Three Terminal Adjustable or Fixed Voltages* High Efficiency Linear Regulators Output Current of 5A  Microprocessor Supply Operates Down to 1V Dropout  Constant Current Regulators Line Regulation: 0.2% Max.  Battery Chargers Load Regulation: 0.4% Max.  Notebook/Personal Computer Supplies TO-220 ,TO252and TO-263 package available  Portable Instrumentation

ORDERING INFORMATION

3 LEAD TO-220 TO-252 2 LEAD TO-263

BM1084 BM1084-ADJ BM1084 -ADJ 0 to 125 C BM1084-1.8 BM1084-1.8 BM1084-1.8 0 to 125 C BM1084-2.5 BM1084-2.5 BM1084-2.5 0 to 125 C BM1084-2.85 BM1084-2.85 BM1084-2.85 0 to 125 C BM1084-3.0 BM1084-3.0 BM1084-3.0 0 to 125 C BM1084-3.3 BM1084-3.3 BM1084-3.3 0 to 125 C BM1084-3.5 BM1084-3.5 BM1084-3.5 0 to 125 C BM1084-5.0 BM1084-5.0 BM1084-5.0 0 to 125 C PIN DESCRIPTIONS FIXED VERSION ADJUSTABLE VERSION 1- Ground 1 - Adjust 2- V O U T 2- V OUT 3- V I N 3- V IN PART NO. BM1084S-X.X (X.X =output voltage), S=TO263-2 package BM1084D-X.X (X.X =output voltage), D=TO252-2 package BM1084T-X.X (X.X =output voltage), T=TO220-3 package

BOOKLY MICRO ELECTRONIC LIMITED CORP. ABSOLUT MAXIMUM RATINGS (Note 1) Power Dissipation Input Voltage Operating Junction Temperature Control Section Power Transistor Storage temperature Internally limited 22V 0°C to 125°C 0°C to 150°C - 65°C to +150°C Soldering information Lead Temperature (10 sec) 300°C Thermal Resistance TO-220 package φ JA= 50°C/W TO-263 package φ JA= 30°C/W* * With package soldering to copper area over backside ground plane or internal power plane φJA can vary from 20°C/W to >40°C/W depending on mounting technique and the size of the copper area.

ELECTRICAL CHARACTERISTICS

Electrical Characteristics at I OUT = 0 mA, and T J = +25°C unless otherwise specified. Parameter Device Conditions Min Type Max Units Reference Voltage (Note 2) BM1084 I OUT = 10 mA 10mA ≤I OUT ≤5A, 1.5V≤ (V IN - V OUT ) ≤12V 1.238 1.225 1.250 1.250 1.262 1.270 V V Output Voltage (Note 2) BM1084-1. 0≤I OUT ≤5A ,3.0V≤V IN ≤12V 1.780 1.750 1.800 1.800 1.818 1.830 V V BM1084-2.5 0≤I OUT ≤5A ,4.0V≤V IN ≤12V 2.475 2.450 2.500 2.500 2.525 2.550 V V BM1084-2.85 0≤I OUT ≤5A ,4.35V≤V IN ≤12V 2.82 2.79 2.850 2.850 2.88 2.91 V V BM1084-3.0 0≤I OUT ≤5A ,4.5V≤V IN ≤12V 2.970 2.940 3.000 3.000 3.300 3.360 V V BM1084-3.3 0≤I OUT ≤5A ,4.75V≤V IN ≤12V 3.267 3.235 3.300 3.300 3.333 3.365 V V BM1084-3.5 0≤I OUT ≤5A ,5.0V≤V IN ≤12V 3.465 3.430 3.500 3.500 3.535 3.570 V V BM1084-5.0 0≤I OUT ≤5A ,6.5V≤V IN ≤12V 4.950 4.900 5.000 5.000 5.050 5.100 V V

BOOKLY MICRO ELECTRONIC LIMITED CORP. Parameter Device Conditions Min Typ Max Units Line Regulation BM1084/-1.5/-2.5/-2.85/ I LOAD = 10 mA 1.5V≤(V IN – V out ) ≤12V 0.3 0.6 mV mV Load Regulation (Notes 2, 3) BM1084-ADJ IN – V out =3V, 10mA≤I OUT ≤5A 0.1 0.2 0.3 0.4 BM1084-1.5 V IN = 5V, 0≤I OUT ≤5A mV mV BM1084-2.5 V IN = 5V, 0≤I OUT ≤5A mV mV BM1084-2.85 V IN = 5V, 0≤I OUT ≤5A mV mV BM1084-3.0 V IN = 5V, 0≤I OUT ≤5A mV mV BM1084-3.3 V IN = 5V, 0≤I OUT ≤5A mV mV BM1084-3.5 V IN = 5.25V, 0≤I OUT ≤5A mV mV BM1084-5.0 V IN = 8V, 0≤I OUT ≤5A mV mV\` Dropout Voltage IN V OUT OUT , ∆V REF = 1%, I OUT = 5 A (Note 4) 1.3 1.5 V Current Limit BM1084/-1.5/-2.5/-2.85/ IN - V OUT ) = 5V 5.00 6.00 7.00 A Minimum Load Current BM1084 (V IN - V OUT ) = 12V (Note 5) 5 10 mA Quiescent Current BM1084/-1.5/-2.5/-2.85/ V IN 12V 5 10 mA Ripple Rejection BM1084 f =120Hz , C OUT = 25 F Tantalum, I OUT = 5A,(V IN OUT ) = 3V, C ADJ =25μF 75 dB BM1084-1.8 f =120Hz , C OUT = 25 F Tantalum, I OUT = 5A, V IN = 4.5V 72 dB BM1084-2.5 f =120Hz , C OUT = 25 F Tantalum, I OUT = 5A, V IN = 5.5V 72 dB BM1084-2.85 f =120Hz , C OUT = 25 F Tantalum, I OUT = 5A, V IN = 6V 60 72 dB BM1084-3.0 f =120Hz , C OUT = 25 F Tantalum, I OUT = 5A V IN = 6V 60 72 dB BM1084-3.3 f =120Hz , C OUT = 25 F Tantalum, I OUT = 5A V IN = 6.3V 60 72 dB BM1084-3.5 f =120Hz , C OUT = 25 F Tantalum, I OUT = 5A V IN = 6.5V 60 72 dB BM1084-5.0 f =120Hz , C OUT = 25 F Tantalum, I OUT = 5A, V IN = 8V 60 68 dB

BOOKLY MICRO ELECTRONIC LIMITED CORP. Parameter Device Conditions Min Typ Max Units Thermal Regulation BM1084 T A = 25°C, 30ms pulse 0.008 0.04 %W Adjust Pin Current BM1084 10mA OUT 5A , 1.5V (V IN - V OUT 12V 120 µA µA Adjust Pin Current Change BM1084 10mA I OUT 5A , 1.5V (V IN - V OUT 12V 0.2 5.0 µA Temperature Stability 0.5 % Long Term Stability T A =125°C, 1000Hrs 0.3 1 % RMS Output Noise (% of V OUT T A = 25°C , 10Hz f 10kHz 0.003 Thermal Resistance Junction-to-Case M Package: Control Circuitry/ Power Transistor T Package: Control Circuitry/ Power Transistor 1.5/4.0 1.5/4.0 °C/W °C/W Parameters identified with boldface type apply over the full operating temperature range. Note 1: Absolute Maximum Ratings indicate limits beyond which damage to the device may occur. For guaranteed specifications and test conditions, see the The guaranteed specifications apply only for the test conditions listed. Note 2: Line and Load regulation are guaranteed up to the maximum power dissipation of 15W. Power dissipation is determined by the input/output differential and the output current. Guaranteed maximum power dissipation will not be available over the full input/output range. Note 3: See thermal regulation specifications for changes in output voltage due to heating effects. Line and load regulation are measured at a constant junction temperature by low duty cycle pulse testing. Load regulation is measured at the output lead ~1/8” from the package. Note 4: Dropout voltage is specified over the full output current range of the device. Note 5: Minimum load current is defined as the minimum output current required to maintain regulation. When (V IN - V OUT ) = 12V the device is guaranteed to regulate if the output current is greater than 10mA. APPLICATION HINTS The BM1084 series of adjustable and fixed regulators are easy to use and have all the protec tion features expected in high performance voltage regulators: short circuit protection and thermal shut-down. Pin compatible with older three terminal adjustable regulators, these devices offer the advantage of a lower dropout voltage, more precise reference tolerance and improved reference stability with temperature. Stability The circuit design used in the BM1084 series requires the use of an outpu t capacitor as part of the device frequency compensation. The addition of 22 uF aluminum electrolytic or a 22uF solid tantalum on the output will ensure stability for all operating conditions. When the adjustment terminal is bypassed with a capacitor to improve the ripple rejection, the requirement for an output capacitor incr eases. The value of 22uF tantalum or 220 uF aluminum covers all cases o f bypassing the adjustment terminal. Without bypassing the adjustment terminal smaller capacitors can be used with equally good results. To ensure good transient response with heavy load current changes capacitor values on the order of 100uF are used in the output of many regulators. To further improve stability and transient respon se of these devices large r values of output capacitor can be used. Protection Diodes Unlike older regulators, the BM1084 family does not need any protection diodes between the adjustment pin and the output and from the output to t he input to prevent over-stressing the die. Inter nal resistors are limiting the internal current paths on the BM1084 adjustment pin, therefore even with capacit ors on the adjustment pin no protection diode is needed to ensure device safety unde r short-circuit conditions. Diodes between the input and output are not usually

BOOKLY MICRO ELECTRONIC LIMITED CORP. instantaneously shorted to ground, damage can occur. capacitor should be 25uF. At 10kHz only 0.22uF is needed. represents a small error and it can usually be ignored. Figure 1. Basic Adjustable Regulator load regulation is measured at the bottom of the package.

BOOKLY MICRO ELECTRONIC LIMITED CORP. resistance between the regulator and the load would be: RP x「( R2+R1 )/ R1」 RP = Parasitic Line Resistance Connected as shown below,R P is not multiplied by the divider ratio. Using 16-gauge wire the parasitic line resistance is about 0.004 per foot, translating to 4mV/ft at 1A loa d curre nt. It is important to keep the positive lead between regulator and load as short as possible and use large wire or PC board traces. BM1084 IN OUT ADJ VIN R1* R2* Rp RL Thermal Considerations The BM1084 series have internal power and thermal limiting circuitry designed to protect the device unde r overload conditions. However maximum junction temperature ratings sh oul d not be exceeded unde r continuous normal load condit ions. Car eful consideration must be given to all sources of thermal resistance from junction to ambient, including junction-to-case, case-to-heat sink interface and he at sink resistance itself. To ensure safe operating temperatures and reflect more accurately the device temperature, new thermal resistance specifications have been developed. Unlike older regulators with a single circuitry designed to protect the device under overload junction-to-case thermal resist ance specificat ion, the data section for these new regulators provides a separate thermal resistance and maximum junction temperature fo r both the Control Section and the Power Transistor. Calculati ons for both temperatures under certain conditions of ambient temperature and heat sink resistance and to ensure that both thermal limits are met. Thermal Considerations The BM1084 series have internal power and thermal limiting circuitry designed to protect the device under overload conditions. However maximum junction temperature ratings should not be exceeded under continuous normal load conditions. Careful consideration must be given to all sources of thermal resistance from junction to ambient, including junction-to-case, case-to-heat sink interface and heat sink resistance itself. To ensure safe operating temperatures and reflect more accurately the device temperature, new thermal resistance specifications have been developed. Unlike older regulators with a single junction-to-case thermal resist ance sp ecification, the data section for these new regulators provides a separate thermal resistance and maximum junction temperature fo r both the Control Section and the Power Transistor. Calculati ons for both temperatures under certain conditions of ambient temperature and heat sink resistance and to ensure that both thermal limits are met. Junction-to-case thermal resistance is specified from the IC junction to the bottom of the case directly below the die. This is the lowest resistance path for the heat flow. In orde r to ensure the best possible thermal flow from this area o f the package to the heat sink proper mounting is required. Thermal compound at the case -to-h eat sink interface is recommended. A thermally conductive spacer can be used, if the case of the device must be electrically isolated, but its added contribution to thermal resistance has to be considered.

BOOKLY MICRO ELECTRONIC LIMITED CORP. TYPICAL PERFORMANCE CHARACTERISTICS

BOOKLY MICRO ELECTRONIC LIMITED CORP. PACKAGE DIMENSIONS inches (millimeters) unless otherwise noted.

3 LEAD TO-220 PLASTIC PACKAGE

3 LEAD TO-263 PLASTIC

2 LEAD TO-263 PLASTIC

BOOKLY MICRO ELECTRONIC LIMITED CORP. TO-252 PLASTIC Note: Bookly Micro corporation assumes no responsibility for any errors which may appear in this document. reserves the right to change devices or s pecifications detailed herein at any time without notice.