RH1573K DICE Low Dropout PNP Regulator Driver DESCRIPTION ABSOLUTE MAXIMUM RATINGS The RH1573 is a regulator driver IC designed to provide a solution for applications requiring high current, low dropout and fast transient response. When driving an external PNP power transistor, this device provides load current up to 5A with a dropout voltage as low as 0.35V. The RH1573 circuitry is designed for extremely fast transient response. This greatly reduces bulk storage capacitance when the regulator is used in applications with fast, high current load transients. The RH1573 uses a time-delayed latching overcurrent protection technique that requires no external sense resistor. Base drive is limited for instantaneous protection, and a time-delayed latch protects the regulator from continuous short circuits. Input Pin Voltage (VIN to GND) .................................10V Drive Pin Voltage (VDRIVE to GND) ............................10V Output Pin Voltage (VOUT to GND) ............................10V Shutdown Pin Voltage (VSHDN to GND) .....................10V Operating Junction Temperature Range ................................................ –55°C to 125°C Storage Temperature Range................... –65°C to 150°C (Note 1) L, LT, LTC and LTM are registered trademarks of Linear Technology Corporation. All other trademarks are the property of their respective owners. rh1573kdicef 1 RH1573K DICE TABLE 1: ELECTRICAL CHARACTERISTICS PARAMETER NOTES MIN IDRIVE = 20mA, TJ = 25°C 2 1.252 5mA < IDRIVE < 250mA, 3V < VIN < 7V, 1.5V < VDRIVE < 7V 2 CONDITIONS Reference Voltage Line Regulation (VFB) IDRIVE = 20mA, 3V < VIN < 7V Load Regulation (VFB) ΔIDRIVE = 20mA to 250mA FB Pin Bias Current VFB = 1.265V DRIVE Pin Current VFB = 1.35V, VDRIVE = 7V VFB = 1.15V, VDRIVE = 1.5V DRIVE Pin Saturation Voltage IDRIVE = 20mA, VFB = 1.15V IDRIVE = 250mA, VFB = 1.15V (Preirradiation) TA = 25°C SUBTYP MAX GROUP 1.265 0.17 1 LATCH Pin Latch-Off Threshold Voltage 1 LATCH Pin Charging Current 4 LATCH Pin Latching Current VIN – VOUT Differential Threshold for Latch Disable Minimum Input Voltage for Bias Operation 10KRAD(Si) NOTES MIN MAX V mV 18 1 40 2, 3 mV 4 1 6 2, 3 μA 1.2 1 1 2 2, 3 2, 3 mA mA 0.2 1.0 1 1 0.3 1.4 2, 3 2, 3 V V 230 1.3 1.5 1 200 300 1 1.4 1.8 1 0.8 2 10 1 0.85 1 0.7 0.8 1 1.7 2.8 1 2.4 1 0.4 1 TABLE 2: ELECTRICAL CHARACTERISTICS 2, 3 2, 3 7 0.55 1.305 2 0.65 VIN = 7V Input Quiescent Current V 1.265 1 290 VSHDN = 5V UNITS 2 0.8 0.12 0.73 SUBGROUP 1 1.225 SHDN Pin Threshold Voltage SHDN Pin Current 1.278 –55°C ≤ TA ≤ 125°C MIN TYP MAX 1.6 2, 3 V 350 2, 3 μA 2.3 2, 3 V 14 2, 3 μA 0.85 2, 3 mA 1.1 2, 3 V 3.5 2, 3 mA 2, 3 V 2.8 (Postirradiation) 20KRAD(Si) MIN MAX 50KRAD(Si) MIN MAX 100KRAD(Si) 200KRAD(Si) MIN MAX MIN MAX UNITS 1.252 1.278 1.252 1.278 1.249 1.281 1.245 1.285 1.239 1.291 V PARAMETER CONDITIONS Reference Voltage IDRIVE = 20mA, TJ = 25°C Line Regulation (VFB) IDRIVE = 20mA, 3V < VIN < 7V 2.1 2.2 2.5 3 4 mV Load Regulation (VFB) IDRIVE= 20mA to 250mA 19 20 22 25 30 mV FB Pin Bias Current VFB = 1.265V 4.2 4.5 5 6 7 μA DRIVE Pin Current VFB = 1.35V, VDRIVE = 7V VFB = 1.15V, VDRIVE = 1.5V 1.3 1.4 1.7 2.2 3 mA mA DRIVE Pin Saturation Voltage 290 IDRIVE = 20mA, VFB = 1.15V IDRIVE = 250mA, VFB = 1.15V SHDN Pin Threshold Voltage SHDN Pin Current 2 0.2 1 1 VSHDN = 5V 288 1.5 300 285 0.21 1.02 1 1.5 300 275 0.23 1.05 1 1.52 300 260 0.25 1.1 1 1.55 300 1 0.3 1.2 V V 1.6 V 300 μA rh1573kdicef 2 RH1573K DICE TABLE 2: ELECTRICAL CHARACTERISTICS PARAMETER CONDITIONS 10KRAD(Si) NOTES MIN MAX (Postirradiation) 20KRAD(Si) MIN MAX 50KRAD(Si) MIN MAX 100KRAD(Si) 200KRAD(Si) MIN MAX MIN MAX UNITS LATCH Pin Latch-Off Threshold Voltage 1 1.9 1 2 0.9 2.1 0.8 2.2 0.8 2.2 V LATCH Pin Charging Current 4.4 10 4.4 10 4.2 10.5 4 11 4 11 μA 0.85 mA LATCH Pin Latching Current 0.85 VIN – VOUT Differential Threshold for Latch Disable Input Quiescent Current 0.5 0.81 VIN = 7V 0.85 0.5 2.8 Minimum Input Voltage for Bias Operation 2.4 0.82 0.85 0.48 2.8 2.4 0.85 0.85 0.45 2.85 2.4 0.9 0.4 2.9 1 3.1 2.4 2.4 V mA V TABLE 3: POST BURN-IN ENDPOINTS AND DELTA LIMITS REQUIREMENTS TA = 25°C PARAMETER CONDITIONS Reference Voltage IDRIVE = 20mA, VIN = 5V DRIVE Pin Current VFB = 1.15V, VDRIVE = 1.5v Note 1: Stresses beyond those listed under Absolute Maximum Ratings may cause permanent damage to the device. Exposure to any Absolute Maximum Rating condition for extended periods may affect device reliability and lifetime. NOTES ENDPOINT LIMITS MIN MAX 1.252 280 1.278 DELTA LIMITS MIN MAX –0.005 0.005 –10 10 UNITS V mA Note 2: Operating conditions are limited by maximum junction temperature. The regulated feedback or output voltage specification will not apply for all possible combinations of input voltage, drive voltage and drive current. When operating at maximum drive current, the drive voltage range must be limited. When operating at maximum input and drive voltage, the drive current must be limited. rh1573kdicef Information furnished by Linear Technology Corporation is believed to be accurate and reliable. However, no responsibility is assumed for its use. Linear Technology Corporation makes no representation that the interconnection of its circuits as described herein will not infringe on existing patent rights. 3 RH1573K DICE TABLE 4: ELECTRICAL TEST REQUIREMENTS MIL-STD-883 TEST REQUIREMENTS PDA Test Notes The PDA is specified as 5% based on failures from group A, subgroup 1, tests after cooldown as the final electrical test in accordance with method 5004 of MIL-STD-883. The verified failures of group A, subgroup 1, after burn-in divided by the total number of devices submitted for burn-in in that lot shall be used to determine the percent for the lot. Linear Technology Corporation reserves the right to test to tighter limits than those given. SUBGROUP Final Electrical Test Requirements (Method 5004) 1*,2,3 Group A Test Requirements (Method 5005) 1,2,3 Group B and D for Class S, End Point Electrical Parameters (Method 5005) 1,2,3 *PDA applies to subgroup 1. See PDA Test Notes. TOTAL DOSE BIAS CIRCUIT RH1573K W10 FB COMP NC LATCH VOUT NC SHDN VIN 7V 20mA 340Ω GND DRIVE 1μF RH1573 BIAS I.D. No. 66-10-1573 rh1573kdicef 4 Linear Technology Corporation LT 1208 • PRINTED IN USA 1630 McCarthy Blvd., Milpitas, CA 95035-7417 (408) 432-1900 ● FAX: (408) 434-0507 ● www.linear.com © LINEAR TECHNOLOGY CORPORATION 2008