LD3985 SERIES ULTRA LOW DROP-LOW NOISE BICMOS VOLTAGE REGULATORS LOW ESR CAPACITORS COMPATIBLE ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ INPUT VOLTAGE FROM 2.5V TO 6V STABLE WITH LOW ESR CERAMIC CAPACITORS ULTRA LOW DROPOUT VOLTAGE (100mV TYP. AT 150mA LOAD, 0.4mV TYP. AT 1mA LOAD) VERY LOW QUIESCENT CURRENT (85µA TYP. AT NO LOAD, 170µA TYP. AT 150mA LOAD; MAX 1.5µA IN OFF MODE) GUARANTEED OUTPUT CURRENT UP TO 150mA WIDE RANGE OF OUTPUT VOLTAGE: 1.2V; 1.22V; 1.25V; 1.35V; 1.5V; 1.8V; 2V; 2.1V; 2.2V; 2.4V; 2.5V; 2.6V; 2.7V; 2.8V; 2.85V; 2.9V; 3V; 3.1V; 3.2V; 3.3V; 4.7V; 5V FAST TURN-ON TIME: TYP. 200µs [CO=1µF, CBYP= 10nF AND IO=1mA] LOGIC-CONTROLLED ELECTRONIC SHUTDOWN INTERNAL CURRENT AND THERMAL LIMIT OUTPUT LOW NOISE VOLTAGE 30µVRMS OVER 10Hz to 100KHz S.V.R. OF 60dB AT 1KHz, 50dB AT 10KHz TEMPERATURE RANGE: -40°C TO 125°C DESCRIPTION The LD3985 provides up to 150mA, from 2.5V to 6V input voltage. Flip-Chip (1.57x1.22) SOT23-5L TSOT23-5L The ultra low drop-voltage, low quiescent current and low noise make it suitable for low power applications and in battery powered systems. Regulator ground current increases only slightly in dropout, further prolonging the battery life. Power supply rejection is better than 60 dB at low frequencies and starts to roll off at 10KHz. High power supply rejection is maintained down to low input voltage levels common to battery operated circuits. Shutdown Logic Control function is available, this means that when the device is used as local regulator, it is possible to put a part of the board in standby, decreasing the total power consumption. The LD3985 is designed to work with low ESR ceramic capacitors. Typical applications are in mobile phone and similar battery powered wireless systems. Figure 1: Schematic Diagram October 2004 Rev. 8 1/14 LD3985 SERIES Table 1: Absolute Maximum Ratings Symbol Parameter VI DC Input Voltage VO DC Output Voltage VINH INHIBIT Input Voltage Value Unit -0.3 to 6 (*) V -0.3 to VI+0.3 V V IO Output Current -0.3 to VI+0.3 Internally limited PD Power Dissipation Internally limited TSTG Storage Temperature Range -65 to 150 °C TOP Operating Junction Temperature Range -40 to 125 °C Absolute Maximum Ratings are those values beyond which damage to the device may occur. Functional operation under these condition is not implied. (*) The input pin is able to withstand non repetitive spike of 6.5V for 200ms. Table 2: Thermal Data Symbol Parameter Rthj-case Thermal Resistance Junction-case Rthj-amb Thermal Resistance Junction-ambient SOT23-5L/ TSOT23-5L Flip-Chip 81 255 Unit °C/W 170 °C/W Table 3: Order Codes SOT23-5L TSOT23-5L Flip-Chip OUTPUT VOLTAGES LD3985M12R (*) LD3985M122R LD3985M125R (*) LD3985M135R (*) LD3985M15R LD3985M18R LD3985M20R (*) LD3985M21R (*) LD3985M22R (*) LD3985M24R (*) LD3985M25R LD3985M26R (*) LD3985M27R LD3985M28R (*) LD3985M285R (*) LD3985M29R LD3985M30R (*) LD3985M31R (*) LD3985M32R (*) LD3985M33R LD3985M44R (*) LD3985M47R LD3985M48R (*) LD3985M49R (*) LD3985M50R (*) LD3985G12R (*) LD3985G122R (*) LD3985G125R (*) LD3985G135R (*) LD3985G15R (*) LD3985G18R LD3985G20R (*) LD3985G21R (*) LD3985G22R (*) LD3985G24R (*) LD3985G25R LD3985G26R (*) LD3985G27R LD3985G28R (*) LD3985G285R (*) LD3985G29R LD3985G30R (*) LD3985G31R (*) LD3985G32R (*) LD3985G33R (*) LD3985G44R (*) LD3985G47R (*) LD3985G48R (*) LD3985G49R (*) LD3985G50R (*) LD3985J12R (*) LD3985J122R LD3985J125R LD3985J135R LD3985J15R (*) LD3985J18R LD3985J20R (*) LD3985J21R (*) LD3985J22R (*) LD3985J24R LD3985J25R LD3985J26R LD3985J27R LD3985J28R LD3985J285R (*) LD3985J29R LD3985J30R LD3985J31R LD3985J32R (*) LD3985J33R LD3985J44R (*) LD3985J47R LD3985J48R LD3985J49R (*) LD3985J50R (*) 1.20 V 1.22 V 1.25 V 1.35 V 1.5 V 1.8 V 2.0 V 2.1 V 2.2 V 2.4 V 2.5 V 2.6 V 2.7 V 2.8 V 2.85 V 2.9 V 3.0 V 3.1 V 3.2 V 3.3 V 4.4 V 4.7 V 4.8 V 4.9 V 5.0 V (*) Available on request. 2/14 LD3985 SERIES Figure 2: Connection Diagram (top view for SOT and TSOT, top through view for Flip-Chip) TSOT23-5L/SOT23-5L Flip-Chip Table 4: Pin Description Pin N° SOT23-5L/ TSOT23-5L Pin N° Flip-Chip 1 4 VI 2 3 2 1 GND VINH 4 5 BYPASS 5 3 VO Symbol Name and Function Input Voltage of the LDO Common Ground Inhibit Input Voltage: ON MODE when VINH ≥ 1.2V, OFF MODE when VINH ≤ 0.4V (Do not leave floating, not internally pulled down/up) Bypass Pin: Connect an external capacitor (usually 10nF) to minimize noise voltage Output Voltage of the LDO Figure 3: Typical Application Circuit 3/14 LD3985 SERIES Table 5: Electrical Characteristics For LD3985 (Tj = 25°C, VI = VO(NOM) +0.5V, CI = 1µF, CBYP = 10nF, IO = 1mA, VINH = 1.4V, unless otherwise specified) Symbol Parameter VI Operating Input Voltage VO Output Voltage < 2.5V VO ∆VO Output Voltage ≥ 2.5V Line Regulation (Note 1) Test Conditions Min. Typ. Max. Unit 2.5 6 V IO = 1 mA -50 50 mV TJ= -40 to 125°C -75 75 IO = 1 mA -2 2 TJ= -40 to 125°C -3 3 % of VO(NOM) %/V VI = VO(NOM) + 0.5 to 6 VTJ= -40 to 125°C -0.1 0.1 VO = 4.7 to 5V -0.19 0.19 ∆VO Load Regulation IO = 1 mA to 150mA TJ= -40 to 125°C VO < 2.5V 0.002 0.008 %/mA ∆VO Load Regulation IO = 1 mA to 150mA VO ≥ 2.5V TJ= -40 to 125°C (for Flip-Chip) 0.0004 0.002 %/mA IO = 1 mA to 150mA, TJ= -40 to 125°C (for SOT23-5L/TSOT23-5L), VO ≥ 2.5V 0.0025 0.005 ∆VO IQ Output AC Line Regulation VI = VO(NOM) + 1 V, IO = 150mA, tR= tF = 30µs Quiescent Current ON MODE: VINH = 1.2V IO = 0 IO = 0 mVPP 85 µA TJ= -40 to 125°C 150 IO = 0 to 150mA IO = 0 to 150mA 1.5 170 TJ= -40 to 125°C 250 OFF MODE: VINH = 0.4V 0.003 TJ= -40 to 125°C VDROP Dropout Voltage (NOTE 1) IO = 1mA IO = 1mA 1.5 0.4 TJ= -40 to 125°C 2 IO = 50mA IO = 50mA 20 TJ= -40 to 125°C 35 IO = 100mA IO = 100mA 45 TJ= -40 to 125°C 70 IO = 150mA IO = 150mA mV 60 TJ= -40 to 125°C 100 Short Circuit Current RL = 0 600 mA SVR Supply Voltage Rejection VI = VO(NOM)+0.25V ± f = 1KHz VRIPPLE = 0.1V, IO= 50mA f = 10KHz VO(NOM) < 2.5V, VI = 2.55V 60 50 dB IO(PK) Peak Output Current VO ≥ VO(NOM) - 5% 550 mA VINH VI = 2.5V to 6V 125°C IINH Inhibit Input Logic Low Inhibit Input Logic High Inhibit Input Current eN Output Noise Voltage BW = 10 Hz to 100 KHz tON Turn On Time (Note 4) CBYP = 10 nF 100 Thermal Shutdown Note 5 160 ISC TSHDN 4/14 VINH = 0.4V 300 TJ= -40 to 0.4 V 1.2 VI = 6V CO = 1 µF ±1 nA µVRMS 30 250 µs °C LD3985 SERIES Symbol CO Parameter Output Capacitor Test Conditions Capacitance (Note 6) ESR Min. 1 5 Typ. Max. Unit 22 5000 µF mΩ Note 1 – For VO(NOM) < 2V, VI = 2.5V Note 2 – For VO(NOM) = 1.25V, VI = 2.5V Note 3 – Dropout voltage is the input-to-output voltage difference at which the output voltage is 100mV below its nominal value. This specification does not apply for input voltages below 2.5V. Note 4 – Turn-on time is time measured between the enable input just exceeding VINH High Value and the output voltage just reaching 95% of its nominal value Note 5 – Typical thermal protection hysteresis is 20°C Note 6 - The minimum capacitor value is 1µF, anyway the LD3985 is still stable if the compensation capacitor has a 30% tolerance in all temperature range. TYPICAL PERFORMANCE CHARACTERISTICS (Tj = 25°C, VI = VO(NOM) +0.5V, CI = CO = 1µF, CBYP = 10nF, IO = 1mA, VINH = 1.4V, unless otherwise specified) Figure 4: Output Voltage vs Temperature Figure 6: Output Voltage vs Temperature Figure 5: Output Voltage vs Temperature Figure 7: Shutdown Voltage vs Temperature 5/14 LD3985 SERIES Figure 8: Shutdown Voltage vs Temperature Figure 11: Line Regulation vs Temperature Figure 9: Line Regulation vs Temperature Figure 12: Load Regulation vs Temperature Figure 10: Line Regulation vs Temperature Figure 13: Load Regulation vs Temperature 6/14 LD3985 SERIES Figure 14: Load Regulation vs Temperature Figure 17: Quiescent Current vs Temperature Figure 15: Quiescent Current vs Temperature Figure 18: Supply Voltage Rejection vs Frequency Figure 16: Quiescent Current vs Temperature Figure 19: Load Transient Response VI = 3.2V, IO = 1 to 150mA, Rise-Fall time = 1µsec 7/14 LD3985 SERIES Figure 20: Line Transient Response Figure 22: TURN-OFF VI = 3.8V to 4.4V, TJ = 25°C, IO = 150mA, CI = CO = 1µF (X7R), CBYP = 10nF, Rise-Fall time = 1µsec, VO = 2.7V VI = 3.3V, IO = 1mA, CI = CO = 1µF (cer), CBYP = 10nF, Tf = 20ns, VO = 2.8V Figure 21: START-UP VI = 3.3V, IO = 1mA, CI = CO = 1µF (cer), CBYP = 10nF, Tr = 20ns, VO = 2.8V 8/14 LD3985 SERIES SOT23-5L MECHANICAL DATA mm. mils DIM. MIN. TYP MAX. MIN. TYP. MAX. A 0.90 1.45 35.4 57.1 A1 0.00 0.10 0.0 3.9 A2 0.90 1.30 35.4 51.2 b 0.35 0.50 13.7 19.7 C 0.09 0.20 3.5 7.8 D 2.80 3.00 110.2 118.1 E 1.50 1.75 59.0 68.8 e 0.95 37.4 H 2.60 3.00 102.3 118.1 L 0.10 0.60 3.9 23.6 . 7049676C 9/14 LD3985 SERIES TSOT23-5L MECHANICAL DATA mm. mils DIM. MIN. TYP A MAX. MIN. TYP. MAX. 1.1 43.3 3.9 A1 0 0.1 A2 0.7 1.0 27.6 39.4 b 0.3 0.5 11.8 19.7 C 0.08 0.2 3.1 7.9 D 2.9 114.2 E 2.8 110.2 E1 1.6 63.0 e 0.95 37.4 e1 1.9 74.8 L 0.3 0.6 11.8 23.6 7282780B 10/14 LD3985 SERIES Flip-Chip5 MECHANICAL DATA mm. mils DIM. MIN. TYP MAX. MIN. TYP. MAX. A 0.835 0.9 0.965 32.874 35.433 37.992 A1 0.21 0.25 0.29 8.268 9.843 11.417 A2 0.625 0.65 0.675 24.606 25.591 26.575 b 0.265 0.315 0.365 10.433 12.402 14.370 D 1.510 1.540 1.570 59.449 60.630 61.811 E 1.16 1.19 1.22 45.669 46.850 48.031 e 0.45 0.5 0.55 17.717 19.685 21.654 e1 0.816 0.866 0.916 32.126 34.094 36.063 f 0.345 13.583 f1 0.337 13.268 11/14 LD3985 SERIES Tape & Reel SOT23-xL MECHANICAL DATA mm. inch DIM. MIN. TYP A MIN. TYP. 180 13.0 13.2 MAX. 7.086 C 12.8 D 20.2 0.795 N 60 2.362 T 12/14 MAX. 0.504 0.512 14.4 0.519 0.567 Ao 3.13 3.23 3.33 0.123 0.127 0.131 Bo 3.07 3.17 3.27 0.120 0.124 0.128 Ko 1.27 1.37 1.47 0.050 0.054 0.0.58 Po 3.9 4.0 4.1 0.153 0.157 0.161 P 3.9 4.0 4.1 0.153 0.157 0.161 LD3985 SERIES Table 6: Revision History Date Revision Description of Changes 07-May-2004 6 05-Oct-2004 7 Part Number Status Changed on Table 3. tON values are Changed on Table 5. 27-Oct-2004 8 Order Codes changed - Table 3. 13/14 LD3985 SERIES Information furnished is believed to be accurate and reliable. However, STMicroelectronics assumes no responsibility for the consequences of use of such information nor for any infringement of patents or other rights of third parties which may result from its use. No license is granted by implication or otherwise under any patent or patent rights of STMicroelectronics. Specifications mentioned in this publication are subject to change without notice. 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