EZ1587C & EZ1587I 3 Amp Positive Voltage Regulator POWER MANAGEMENT Description Features u Low dropout voltage: 1.3V max. for EZ1587C and The EZ1587 series of high performance positive voltage regulators are designed for use in applications requiring low dropout performance at up to 3A. Additionally, the EZ1587 series provides excellent regulation over variations in line, load and temperature. 1.4V max. for EZ1587I u Full current rating over line and temperature u Fast transient response u ±2% total output regulation over line, load and Outstanding features include low dropout performance at rated current, fast transient response, internal current limiting and thermal shutdown protection of the output device. u u u u A variety of options are available for maximum flexibility: u the EZ1587C is intended for commercial applications and u has both fixed and adjustable voltage options; the EZ1587I is intended for industrial applications and is adjustable only. temperature Adjust pin current max 90µA over temperature Fixed/adjustable output voltage (EZ1587C) Line regulation typically 0.015% Load regulation typically 0.05% Industrial temperature range (EZ1587I) TO-220 and TO-263 packages Applications u u u u u u u All devices are available in the popular TO-220 and TO-263 packages. Typical Application Circuit Printer and plotter supplies Instrumentation Medical equipment Microcontroller systems Telecommunication systems Motherboards Switching supply post regulation Fixed Voltage Regulator U1 3 VIN > 4.75V + IN EZ1587C-3.3 2 TAB OUT VOUT = 3.3V + C1 10uF Tant. GND C2 10uF Tant. Min. 1 Adjustable Voltage Regulator U1 3 VIN > 4.75V + C1 10uF Tant. IN EZ1587 TAB OUT 2 VOUT = 3.45V R1 133 Ohm, 1% ADJ + C2 10uF Tant. Min 1 R2 232 Ohm, 1% Notes: (1) C1 needed if device is far from filter capacitors (2) C2 minimum value required for stability Revision 1, December 2000 1 R2 VOUT = VREF • 1 + + I ADJ • R 2 R1 www.semtech.com EZ1587C & EZ1587I POWER MANAGEMENT Absolute Maximum Ratings Parameter Sy mbol Maximum U nits Input Supply Voltage VIN 7 V Power D i ssi pati on PD Internally Li mi ted W Thermal Resi stance Juncti on to C ase TO-220 TO-263 q JC 3 3 °C /W Thermal Resi stance Juncti on to Ambi ent TO-220 TO-263 q JA 50 60 °C /W Operati ng Ambi ent Temperature Range EZ1587C EZ1587I TA 0 to 70 -40 to 85 °C Operati ng Juncti on Temperature Range EZ1587C EZ1587I TJ 0 to 125 -40 to 125 °C Storage Temperature Range TSTG -65 to 150 °C Lead Temperature (Solderi ng) 10 Sec. TLEAD 300 °C ESD Rati ng (Human Body Model) ESD 2 kV Electrical Characteristics Unless otherwise specified: Adj. VIN = 2.75V to 7.0V and Adj. IO = 10mA to 3A; Fixed VIN = 4.75 to 7.0V and Fixed IO = 0 mA to 3A. Values in bold apply over full operating ambient temperature range. Parameter Output Voltage (1) Sy mbol VIN IO Min Ty p Max U nits VO 5V 0mA 0.99lVOl VO 1.01lVOl V 0.98lVOl EZ1587C -X.X Reference Voltage (1) VREF 5V 10mA EZ1587C , EZ1587I REG(LINE) Load Regulati on (1) REG(LOAD) 10mA 5V VD 3.0A EZ1587I C urrent Li mi t ã 2000 Semtech Corp. 1.250 1.225 Li ne Regulati on (1) D ropout Voltage(1)(2) EZ1587C , EZ1587C -X.X 1.238 1.02lVOl 3.1 ICL 2 1.262 V 1.275 0.015 0.2 % 0.05 0.4 % 1.20 1.30 V 1.20 1.40 4.5 A www.semtech.com EZ1587C & EZ1587I POWER MANAGEMENT Electrical Characteristics (Cont) Unless otherwise specified: Adj. VIN = 2.75V to 7.0V and Adj. IO = 10mA to 3A; Fixed VIN = 4.75 to 7.0V and Fixed IO = 0 mA to 3A. Values in bold apply over full operating ambient temperature range. Parameter Sy mbol VIN Qui escent C urrent Fi xed Voltage Versi on IQ 5V Temperature C oeffi ci ent TC 0.005 Adjust Pi n C urrent IADJ 55 90 µA DIADJ 0.2 5 µA Adjust Pi n C urrent C hange Temperature Stabi li ty TS 5V Mi ni mum Load C urrent Adj Voltage Versi ons IO 5V RMS Output Noi se(3) VN Ri pple Rejecti on Rati o(4) RA 5V IO Min 0.5A Ty p Max U nits 10 13 mA 0.5 5 3A %/°C 60 % 10 mA 0.003 %VO 72 dB NOTES: (1) Low duty cycle pulse testing with Kelvin connections required. (2) DVOUT, DVREF = 1% (3) Bandwidth of 10 Hz to 10 kHz. (4) 120 Hz input ripple (CADJ for ADJ = 25µF). ã 2000 Semtech Corp. 3 www.semtech.com EZ1587C & EZ1587I POWER MANAGEMENT Pin Configurations Ordering Information D ev ice(1)(2) P ackag e EZ1587C M-X.X.TR EZ1587IM.TR TO-263(3) EZ1587C T-X.X EZ1587IT TO-220(4) Notes: (1) Where X.X denotes voltage options (EZ1587C only). Available voltages are: 1.5V, 1.8V, 2.5V, 3.3V and 3.45V. Leave blank for adjustable version (1.3 to 5.7V). Contact factory for additional voltage options. (2) Where C and I denote Commercial (0°C to 70°C) and Industrial (-40°C to 85°C) ambient temperature ranges. (3) Only available in tape and reel packaging. A reel contains 800 devices. (4) Only available in tube packaging. A tube contains 50 devices. Pin Descriptions Pin Pin N ame Pin Function 1 AD JUST Thi s pi n i s the negati ve si de of the reference voltage for adjustable devi ces. Transi ent response can be i mproved by addi ng a small bypass capaci tor from the adjust pi n to ground. GROUND Thi s pi n i s the bottom end of the i nternal resi stor feedback chai n for fi xed output voltage parts, and should be connected to ground. 2 OUTPUT Thi s i s the power output of the devi ce and i s electri cally connected to the TAB. 3 INPUT Thi s i s the i nput supply pi n for both the control ci rcui try and the pass devi ce. Block Diagram ã 2000 Semtech Corp. 4 www.semtech.com EZ1587C & EZ1587I POWER MANAGEMENT Outline Drawing - TO-220 Outline Drawing - T0-263 ã 2000 Semtech Corp. 5 www.semtech.com EZ1587C & EZ1587I POWER MANAGEMENT Land Pattern - TO-263 Contact Information Semtech Corporation Power Management Products Division 652 Mitchell Rd., Newbury Park, CA 91320 Phone: (805)498-2111 FAX (805)498-3804 ã 2000 Semtech Corp. 6 www.semtech.com