1.0 A Negative Voltage Regulators MC7900 Series The MC7900 series of fixed output negative voltage regulators are intended as complements to the popular MC7800 series devices. These negative regulators are available in the same sevenvoltage www.onsemi.com options as the MC7800 devices. In addition, one extra voltage option commonly employed in MECL systems is also available in the negative MC7900 series. Available in fixed output voltage options from 5.0 V to 24 V, TO220 these regulators employ current limiting, thermal shutdown, and T SUFFIX safearea compensation making them remarkably rugged under CASE 221AB most operating conditions. With adequate heatsinking they can deliver output currents in excess of 1.0 A. Heatsink surface connected to Pin 2. No External Components Required 1 2 Internal Thermal Overload Protection 3 Internal Short Circuit Current Limiting Pin 1. Ground 2. Input Output Transistor SafeArea Compensation 3. Output Available in 2% Voltage Tolerance (See Ordering Information) PbFree Package May be Available. The GSuffix Denotes a 2 D PAK PbFree Lead Finish D2T SUFFIX CASE 936 1 2 Gnd 3 2.0 k 8.0 k Heatsink surface (shown as terminal 4 in case outline drawing) is connected to Pin 2. 3.6 k 4.0 k R 1.0 k 1 1.2 k 1.6 k STANDARD APPLICATION R 2 MC79XX Input Output C * V 10 k in O C ** O 0.33 F 1.0 F 20 pF 10 pF 10 k A common ground is required between the input and the output voltages. The input voltage must 240 20 k 20 k 2.0 k remain typically 2.0 V above more negative even 0.3 1.1 k during the high point of the input ripple voltage. 750 V I XX, These two digits of the type number This device contains 26 active transistors. indicate nominal voltage. ** C is required if regulator is located an in Figure 1. Representative Schematic Diagram appreciable distance from power supply filter. ** C improve stability and transient response. O ORDERING INFORMATION See detailed ordering and shipping information in the package dimensions section on page 11 of this data sheet. DEVICE MARKING INFORMATION See general marking information in the device marking section on page 13 of this data sheet. Semiconductor Components Industries, LLC, 2013 1 Publication Order Number: June, 2020 Rev. 19 MC7900/D 25 12 k 2.4 k 1.0 k 14.7 k 4.0 k 2.0 kMC7900 Series MAXIMUM RATINGS (T = +25C, unless otherwise noted.) A Rating Symbol Value Unit Input Voltage (5.0 V V 18 V) V 35 Vdc O I Input Voltage (24 V) 40 Power Dissipation Case 221A T = +25C P Internally Limited W A D Thermal Resistance, JunctiontoAmbient 65 C/W JA Thermal Resistance, JunctiontoCase 5.0 C/W JC 2 Case 936 (D PAK) T = +25C P Internally Limited W A D Thermal Resistance, JunctiontoAmbient 70 C/W JA Thermal Resistance, JunctiontoCase 5.0 C/W JC Storage Junction Temperature Range T 65 to +150 C stg Junction Temperature T +150 C J Stresses exceeding those listed in the Maximum Ratings table may damage the device. If any of these limits are exceeded, device functionality should not be assumed, damage may occur and reliability may be affected. *This device series contains ESD protection and exceeds the following tests: Human Body Model 2000 V per MIL STD 883, Method 3015 Machine Model Method 200 V MC7905B, MC7905C ELECTRICAL CHARACTERISTICS (V = 10 V, I = 500 mA, Tlow* < T < +125C, unless otherwise noted.) I O J Characteristics Symbol Min Typ Max Unit Output Voltage (T = +25C) V 4.8 5.0 5.2 Vdc J O Line Regulation (Note 1) Reg mV line (T = +25C, I = 100 mA) J O 7.0 Vdc V 25 Vdc 7.0 50 I 8.0 Vdc V 12 Vdc 2.0 25 I (T = +25C, I = 500 mA) J O 7.0 Vdc V 25 Vdc 35 100 I 8.0 Vdc V 12 Vdc 8.0 50 I Load Regulation, T = +25C (Note 1) Reg mV J load 5.0 mA I 1.5 A 11 100 O 250 mA I 750 mA 4.0 50 O Output Voltage V Vdc O 7.0 Vdc V 20 Vdc, 5.0 mA I 1.0 A, P 15 W 4.75 5.25 I O Input Bias Current (T = +25C) I 4.3 8.0 mA J IB Input Bias Current Change I mA IB 7.0 Vdc V 25 Vdc 1.3 I 5.0 mA I 1.5 A 0.5 O Output Noise Voltage (T = +25C, 10 Hz f 100 kHz) V 40 V A n Ripple Rejection (I = 20 mA, f = 120 Hz) RR 70 dB O Dropout Voltage V V Vdc I O I = 1.0 A, T = +25C 1.3 O J Average Temperature Coefficient of Output Voltage V / T mV/C O I = 5.0 mA, Tlow* T +125C 1.0 O J 1. Load and line regulation are specified at constant junction temperature. Changes in V due to heating effects must be taken into account O separately. Pulse testing with low duty cycle is used. *Tlow = 40C for MC7905B and Tlow = 0C for MC7905C. www.onsemi.com 2