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| TECHNICAL DATA Switching Voltage Regulators IK1509-xx Features * * * * * * * * * * * 3.3V, 5V, 12V, and adjustable output versions Adjustable version output voltage range, 1.23V to 18V 3% max over line and load conditions Guaranteed 2A output load current Input voltage range up to 22V Built-in Switching Transistor on chip Excellent line and load regulation specifications 150kHz fixed frequency internal oscillator TTL shutdown capability Low power standby mode, IQ typically 80uA Thermal shutdown and current limit protection Bare chip is available SOP-8 IK1509 TA = -40 to 125 C for all packages Applications * * * Simple high-efficiency step-down regulator On-card switching regulators Positive to negative converter Description The IK1509 series of regulators are monolithic integrated circuits that provide all the active functions for a step-down switching regulator, capable of driving a 2A load with excellent line and load regulation. These devices are available in fixed output voltages of 3.3V, 15V, 12V and an adjustable output version. Requiring a minimum number of external components, these regulators are simple to use. The IK1509 series operates at a switching frequency of 150kHz. Other features include a guaranteed 3% tolerance on output voltage under specified input voltage and output load conditions, and 15% on the oscillator frequency. External shutdown is included, featuring typically 80uA standby current. Self protection features include a two stage frequency reducing current limit for output switch and an over temperature shutdown for complete protection under fault conditions. The over temperature shutdown level is about 145C with 5C hysteresis. 1 IK1509-xx Absolute Maximum Rating (TA = 25oC) Characteristic Maximum Input Supply Voltage ON/OFF Pin Input Voltage Feedback Pin Voltage Output Voltage to Ground Power Dissipation Storage Temperature Range Operating Temperature Range Maximum Junction Temperature ESD Susceptibility (Human Body Model) Operating Supply Voltage Symbol VI VIN VFB VOUT PD Tstg TJ TJMAX VESD VOP Value +30 -0.3 V VI -0.3 V VI -1 Internally limited -65 to +150 -40 TJ +125 150 2 4.5 to +25 Unit V V V V W o C o C C kV V o Typical Aplication (Fixed Output Voltage Versions) 2 IK1509-xx Pin Assignments Pin Descriptions Block Diagram 3 IK1509-xx Electrical Characteristics Unless otherwise specified, TJ = 25 oC, VIN = 12V for the 3.3V, 5V, and Adjustable version and VIN = 18V for the 12V version. ILOAD = 500mA. Characteristic Output Voltage Symbol VOUT Test Condition IK1509-3.3 IK1509-5 IK1509-12 Efficiency IK1509-3.3 4.75V VIN 22V, 0.2A ILOAD 2A 7V VIN 22V, 0.2A ILOAD 2A 15V VIN 22V, 0.2A ILOAD 2A Min 3.20 4.85 11.64 Typ 3.3 5.0 12.0 78 83 90 76 1.20 1.230 1.26 % V % Max 3.40 5.15 12.36 V Unit Feedback Voltage VFB Feedback Bias Current Oscillator Frequency Saturation Voltage Max Duty Cycle (ON) Max Duty Cycle (OFF) Current Limit Output Leakage Current IFB FOSC VSAT DC VIN = 12V, ILOAD = 2A IK1509-5 VIN = 12V, ILOAD = 2A IK1509-12 VIN = 15V, ILOAD = 2A IK1509-ADJ VIN = 12V, ILOAD = 2A IK1509-ADJ 4.5V VIN 22V, 0.2A ILOAD 2A VOUT programmed for 3V IK1509-ADJ; VFB = 1.3V -10 127 150 1.10 100 0 2.4 3 -50 173 1.3 nA kHz V % IOUT = 2A (Note 1,2) (Note 2) (Note 3) ICL IL Peak Current (Note 1,2) Output = 0V (Note 1,3) Output = -1V, VIN = 22V 3.7 50 A A mA mA A V 1 5 80 1.3 2.0 5 10 10 150 0.6 Quiescent Current Standby Quiescent Current ON/OFF Pin Logic Input Threshold Voltage ON/OFF Pin Logic Input Current IQ ISTBY VIL VIH IH IL (Note 3) ON/OFF pin = 5V (OFF), VIN = 22V Low (Regulator ON) High (Regulator OFF) VLOGIC = 2.5V (regulator OFF) VLOGIC = 0.5V (regulator ON) 15 5 A 4 IK1509-xx Note 1: No elements connected to output pin. Note 2: Feedback pin removed from output and connected to 0V to force the output transistor switch ON. Note 3: Feedback pin removed from output and connected to 12V for the 3.3V, 5V, and the ADJ version, and 15V for the 12V version. To force the output transistor switch OFF. Typical Performance Characteristics SWITCHING FREQUENCY OPERATING QUIESCENT CURRENT ON/OFF CURRENT EFFICIENCY SHUTDOWN QUIESCENT CURRENT SWITCH CURRENT LIMIT 5 IK1509-xx Package Dimensions SOP-8 D SUFFIX SOIC (MS - 012AA) Dimension, mm 5 A 8 Symbol A B P MIN 4.8 3.8 1.35 0.33 0.4 1.27 5.72 0 0.1 0.19 5.8 0.25 MAX 5 4 1.75 0.51 1.27 H B C 1 G 4 C R x 45 D F -TD 0.25 (0.010) M T C M K SEATING PLANE G J F M H J K M P R 8 0.25 0.25 6.2 0.5 NOTES: 1. Dimensions A and B do not include mold flash or protrusion. 2. Maximum mold flash or protrusion 0.15 mm (0.006) per side for A; for B 0.25 mm (0.010) per side. 6 |
Price & Availability of IK1509-33
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