GM2950

GM2950 GAMMA | Alldatasheet

Document overview

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Technical content

Features

 High accuracy output voltage  Guaranteed 100mA output  Very low quiescent current  Low dropout voltage  Extremely tight load and line regulation  Very low temperature coefficient  Needs only 1μF capacitor for stability  Error flag warns of output dropout  Logic-controlled electronic shutdown  Output programmable from 1.24V to 29V GM2951-x.x VOUT SENSE CIN VOUT VIN Shutdown n 100K SD GND 5

8 VIN

3.3μF Error Output GND GND

2 GM2950/GM2951 V2.00 GM2950/GM2951 100mA, LOW DROPOUT VOLTAGE REGULATORS Marking Information and Pin Configurations (Top View) GM2950-x.x TO-92 G: Green Product VV: Output Voltage Codes (05: 5.0V, …12:12V) A: Assembly/Test Site Code Y: Year WW: Week Marking Information and Pin Configurations (Top View) GM2951-x.x SO8 G: Green Product VV: Output Voltage Codes (A: Adj, 05: 5.0V, …12:12V) A: Assembly/Test Site Code Y: Year WW: Week 8.VIN 1. VOUT 2. Sense 3. SD 5. Error 6. VTAP 7. GND 4. GND VOUT 1 3 VIN 2 GND GM2950G VV AYWW GM2951G VVAYWW

GM2950/GM2951 V2.00 Preliminary Information GM2950/GM2951 100mA, LOW DROPOUT VOLTAGE REGULATORS

Ordering Information

GM2950-x.x Ordering Number Output voltage Package Shipping GM2950-3.3T92BG 3.3V TO-92 1,000 Units/ESD Bag GM2950-3.3T92RLG 3.3V TO-92 2,000 Units/Ammo Pack (Tape) GM2950-5.0T92BG 5.0V TO-92 1,000 Units/ESD Bag GM2950-5.0T92RLG 5.0V TO-92 2,000 Units/Ammo Pack (Tape) GM2951-x.x GM2951-3.3S8RG 3.3V SO-8 2,500 Units/Tape & Reel GM2951-5.0S8RG 5.0V SO-8 2,500 Units/Tape & Reel

4 GM2950/GM2951 V2.00 GM2950/GM2951 100mA, LOW DROPOUT VOLTAGE REGULATORS Absolute Maximum Ratings PARAMETER SYMBOL RATINGS UNITS VIN Pin Voltage VIN -0.3 to +30 V FB Pin Voltage VFB -1.5 to +30 V SD Pin Voltage VSD -0.3 to +30 V Error Pin Voltage VERR -0.3 to +30 V Operating Junction Temperature Range TJ - 40 to +150 °C Storage Temperature TSTG - 65 to +150 °C Thermal Resistance, Junction to Ambient (SO8 package) θJA 180 °C/W Thermal Resistance, Junction to Ambient (SO8 package) θJC 45 °C/W Lead Temperature 1.6mm (1/6 inch) from case for 5 seconds TLEAD 260 °C ESD Rating (Human Body Model) ESD 2 kV

GM2950/GM2951 V2.00 Preliminary Information GM2950/GM2951 100mA, LOW DROPOUT VOLTAGE REGULATORS Block Diagram GM2950-x.x Block Diagram GM2951-x.x Block Diagram * for fixed output voltage option only VIN GND 1.23V Reference Error Amplifier VOUT 60K VIN GND 1.23V Reference Error Amplifier VOUT ERROR VTAP SENSE SD 60mV Error Detection Comparator FB 60K

6 GM2950/GM2951 V2.00 GM2950/GM2951 100mA, LOW DROPOUT VOLTAGE REGULATORS Electrical Characteristics (Unless otherwise noted, VIN = VOUT + 1V, IOUT = 100μA, COUT = 1μF, and TJ = 25°C) Parameter Symbol Test Condition (Note 1) Min Typ Max Unit Output Voltage VOUT TJ = 25°C 0.99VOTYP VOTYP 1.01VOTYP V -25°C ≤ TJ ≤ 85°C 0.985VOTYP VOTYP 1.015VOTYP Full Operating Temperature 0.98VOTYP VOTYP 1.02VOTYP Output Voltage Temperature Coefficient (Note 2) 50 150 ppm/°C Line Regulation LNR VOUT + 1V ≤ VIN ≤ 30V 0.04 0.2 % Load Regulation (Note 3) LDR 100μA ≤ IOUT ≤ 100mA 0.1 0.3 % Dropout Voltage (Note 4) VD IOUT = 100μA 50 80 mV IOUT = 100mA 380 450 Ground Current IGND IOUT = 100μA 75 120 μA IOUT = 100mA 3 12 mA Dropout Ground Current IDG VIN = VOUT – 0.5V, IOUT = 100μA 110 170 μA Current Limit ICL VOUT = 0V 160 200 mA Thermal Regulation TREG 0.05 0.2 %/W Output Noise, 10Hz to 100KHz COUT = 1μF 430 μVRMS COUT = 200μF 160 COUT = 3μF (Bypass = 0.01, pin 7 to pin 1, GM2951-x.x Only) 100 GM2951-x.x Only Reference Voltage VREF 1.21 1.235 1.26 V Full Operating Temperature 1.185 1.285 Feedback Pin Bias Current IFB 20 40 nA Reference Voltage Temperature Coefficient (Note 2) 50 ppm/°C Feedback Pin Bias Current Temperature Coefficient 0.1 nA/°C ERROR COMPARAMETER Output Leakage Current ILK VOH = 30V 0.01 1.0 μA Output Low Voltage VOL VIN = 4.5V, IOUT = 400μA 150 250 mV Upper Threshold Voltage VTHH Note 6 40 60 mV Lower Threshold Voltage VTHL Note 6 75 95 mV Hysteresis VHYS 15 mV

GM2950/GM2951 V2.00 Preliminary Information GM2950/GM2951 100mA, LOW DROPOUT VOLTAGE REGULATORS Electrical Characteristics (Unless otherwise noted, VIN = VOUT + 1V, IOUT = 100μA, COUT = 1μF, and TJ = 25°C) Parameter Symbol Test Condition (Note 1) Min Typ Max Unit SHUTDOWN INPUT Input Logic Voltage Low Regulator ON 0.7 V Input Logic Voltage Low Regulator OFF 2 Shutdown Pin Input Current ISD VSD = 2.4V 30 50 μA VSD = 30V 450 600 Regulator Output Current in Shutdown (Note 7) VOUT = 5.0V 3 10 μA 3.3V ≤ VOUT < 5.0V 20 2.0V ≤ VOUT < 3.3V 30 Notes: 1. Additional conditions for GM2951 series are the FB tied to VTAP and VOUT Tied to SENSE and VSD ≤ 0.8V 2. Output or Reference voltage temperature coefficients are defined as the worst case voltage change divided by the total temperature range. 3. The Regulation is measured at a constant junction temperature using pulse testing with a low duty cycle. Changes in the output voltage due to heating effects are covered under the specification for thermal regulation. 4. The Dropout voltage is defined as the input-to-output differential, at which the output voltage drops 100mV below it nominal value measure at 1V differential. At very low values of programmed output voltage, the minimum input supply voltage (2V) (2.3V over temperature) must be taken into account. 5. VREF ≤ VOUT ≤ (VIN -1V), 2.3V ≤ VIN ≤ 30V, 100μA ≤ IOUT ≤ 100mA, TJ ≤ TJMAX 6. Comparator thresholds are expressed in terms of a voltage differential at the FB terminal below the nominal reference voltage measured at VOUT + 1V input. To express these thresholds in terms of an output voltage change, multiply by the error amplifier gain = VOUT/VREF = (R1 + R2)/R2. For examples, at a programmed output voltage of 5V, the Error output is guaranteed to go low when the output drops by 95mV x 5V/1.235V = 384mV. Thresholds remain constant as a percent of VOUT as VOUT is varied, with the dropout warning occurring at typically 5% below nominal, 7.5% guaranteed. 7. VSD ≥ 2V, VIN ≤ 30V, VOUT = 0, the FB pin is tied to VTAP.

8 GM2950/GM2951 V2.00 GM2950/GM2951 100mA, LOW DROPOUT VOLTAGE REGULATORS Application Notes  External Capacitors For better stability, it recommended to use a 1.0μF or greater capacitor tied between V OUT and GND. The ESR of about 5Ω or less and resonant frequency above 500KHz are important parameters in the value of capacitor. The capacitor value can be varied, at lower output current, less output capacitance is required. For the currents below 10mA, the value of capacitor can reduced to 0.33μF, and 0.1μF for 1mA. More output capacitance is needed for GM2951 family at voltage below 5V since it runs the error amplifier at lower gain. At worst case, 3.3μF or greater must be used for condition of 100mA load at 1.25v output. If GM2951 is connected to battery or between AC filter capacitor and input is 10 inches wire then 1μF tantalum or aluminum electrolytic capacitor should be connected between V IN and GND. Instability can occur if stray capacitor to FB terminal (Pin 7). This could be eliminated by a 100pF capacitor between VOUT and FB pins and increasing output capacitor to 3.3μF.  Reducing Output Noise To reduce the AC noise presented at VOUT pins, one of the workable approaches is to reduce the regulator bandwidth by increasing the output capacitor value. However, this app roach is not relatively efficient. It is recommended to use a bypass capacitor across R1 sine it reduces the high frequency gain from 4 to unity. With the bypass capacitor, noise no longer scales with output voltage so the improvements are more efficient.  Programming the Output Voltage The GM2951 output voltage is programmable from 1.24V to 29V by external resistors shown in figure below. Compared with fixed output voltage option, Pin 2 and Pin 6 are left open and the external resistors R1 and R2 set the VOUT by the formula: VOUT = VREF x (1 + R1/R2) Where VREF is 1.235V GM2951-A VOUT SENSE CIN See Application Note VOUT VIN Shutdown n 100K SD GND 5 3.3μF Error Output GND GND CBYPASS 0.1μF R2 VREF

GM2950/GM2951 V2.00 Preliminary Information GM2950/GM2951 100mA, LOW DROPOUT VOLTAGE REGULATORS Package Outline Dimensions – TO 92 Package Outline Dimensions – SO 8 4.9 – 5.2 12.7 – 14..2 1.22 – 1.32 0.4 – 0.55 typ. 0.189 – 0.197 (4.800 – 5.004) 0.228 – 0.244 (5.791 – 6.198) 0.150 – 0.157 (3.810 – 3.988) 0.008 – 0.010 (0.203 – 0.254) 0.004 – 0.010 (0.102 – 0.254) 0.053 – 0.059 (1.346 – 1.753) 0.014 – 0.020 (0.356 – 0.508) 0.016 – 0.050 (1.270) Typ Seating Plan 8.0° Max

10 GM2950/GM2951 V2.00 GM2950/GM2951 100mA, LOW DROPOUT VOLTAGE REGULATORS Ordering Number GM 2950 - 3.3 T92 B G APM Gamma Micro Circuit T ype Output Voltage Pack age T ype Shipping T ype 3.3 = 3.3V 5.0 = 5.0V T92: TO 92 ST 89: SOT 89 ST 23: SOT 23 B: Bag RL: Ammo Pack (Tape) T: Tube R: Tape & Reel G:Green Ordering Number GM 2951 - 2.2 S8 R G APM Gamma Micro Circuit T ype Output Voltage Pack age T ype Shipping T ype A = Adj 3.3 = 3.3V 5.0 = 5.0V S8: SO 8 T: Tube R: Tape & Reel Blank :Pb -free G:Green Note: Pb-free products:  RoHS compliant and compatible with the current require-ments of IPC/JEDEC J-STD-020.  Suitable for use in Pb-free soldering processes with 100% matte tin (Sn) plating. Green products:  Lead-free (RoHS compliant)  Halogen free(Br or Cl does not exceed 900ppm by weight in homogeneous material and total of Br and Cl does not exceed 1500ppm by weight)