RS6501 150KHz, 40V, 2A PWM Buck DC/DC Converter DESCRIPTION The RS6501 is Monolithic IC that design for a step‐ down DC/DC Converter, and own the ability of driving a 2A load without additional transistor component. The output version included 3.3V, 5V, 12V and an adjustable type. It operates at a switching frequency of 150KHz thus allowing smaller sized filter components than what would be needed with lower frequency switching regulators. Other features include a guaranteed ±4% tolerance on output voltage under specified input voltage and output load conditions, and ±15% on the oscillator frequency. Regarding protected function, thermal shutdown is to prevent over temperature operating from damage, and current limit is against over current operating of the output switch. FEATURES 3.3V, 5V, 12V and adjustable Adjustable version output voltage range: 1.23‐37V ±4% max over line and load conditions 150KHz ±15% fixed switching frequency TTL shutdown capability Operating voltage can be up to 40V Output load current: 2A SOP‐8 package Low power standby mode Thermal‐shunt down and current‐limit protection Built‐in switching a transistor on chip, requires only 4 external components APPLICATIONS Simple High‐efficiency step‐down regulator Positive to negative converter On‐card switching regulators BLOCK DIAGRAM Tel: 886-66296288‧Fax: 886-29174598‧ http://www.princeton.com.tw‧2F, No. 233-1, Baociao Rd., Sindian Dist., New Taipei City 23145, Taiwan RS6501 APPLICATION CIRCUIT ORDER INFORMATION Device RS6501‐XX YY Z Device Code XX is nominal output voltage (for example, AD=ADJ, 33 = 3.3V, 50 = 5.0V, 12 = 12V). Y is package designator : S : SOP‐8 Z is Lead Free designator : P: Commercial Standard, Lead (Pb) Free and Phosphorous (P) Free Package G: Green (Halogen Free with Commercial Standard) PIN CONFIGURATION PIN DESCRIPTION Symbol VIN VOUT FB SD GND V1.1 Description Regulator Input Pin Regulator Output Pin Output Voltage Feed Back Control Pin ON/OFF Shutdown Pin Ground Pin 2 Pin 1 2 3 4 5, 6, 7, 8 August 2014 RS6501 ABSOLUTE MAXIMUM RATINGS(NOTE1) Parameter Supply Voltage On/Off Pin Input Voltage Feedback Pin Voltage Output Voltage to Ground Power Dissipation Storage Temperature Operating Junction Temperature Range Operating Voltage Symbol VCC VSD VFB VOUT PD TSTG TJ VOP Ratings 40 ‐0.3~+25 ‐0.3~+25 -1 Internally Limited -40 ~ +150 ‐40~+125 +4.5~+40 Units V V V V W o C o C V ELECTRICAL CHARACTERISTICS o Specifications with boldface type apply over for full operating temperature range, the other type are for TJ=25 C Part No. Parameter Symbol Test Conditions Min Typ. Max 3.135 3.3 3.465 Output Voltage VOUT 5V≤VIN≤40V, 0.2A≤ILOAD≤2A RS6501‐3.3V 72 Efficiency η VIN =12V, ILOAD=2A Output Voltage VOUT 7V≤VIN≤40V, 0.2A≤ILOAD≤2A 4.750 5.0 5.250 RS6501‐5.0V 79 Efficiency η VIN=12V, ILOAD=2A Output Voltage VOUT 15V≤VIN≤40V, 0.2A≤ILOAD≤2A 11.40 12.0 12.60 RS6501‐12V Efficiency η VIN=25V, ILOAD=2A 90 4.5V≤VIN≤40V, 0.2A≤ILOAD≤2A Reference Voltage VFB 1.193 1.230 1.280 RS6501‐ADJ VOUT programmed for 3V 72 Efficiency η VIN=12V, ILOAD=2A - (Note2) Unit V % V % V % V % ALL OUTPUT VOLTAGE VERSIONS ELECTRICAL CHARACTERISTICS o Specifications with boldface type apply over for full operating temperature range, the other type are for TJ=25 C (Unless otherwise specified, VIN=12V for the 3.3V, 5V, and adjustable version and VIN=24V for the 12V version, ILOAD=500mA) Parameter Symbol Test Conditions Min Typ. Max Unit Device Parameters Feedback Bias Current Ib Adjustable Version Only, VFB=1.3V Oscillator Frequency fO VFB=3V Saturation Voltage Max. Duty Cycle (ON) Min. Duty Cycle (OFF) Current Limit Output Leakage Current Quiescent Current Standby Quiescent Current Thermal Resistance VSAT IOUT=2A (Note 6,7) ‐ 40 127 110 150 - 1.16 ICL IL IQ (Note 7) (Note 8) Peak Current (Note 6,7) Output=0V (Note 6, 8) (Note 8) ISTBY ON/OFF pin=5V (Note 9) - 85 θJC (Note 10) SOP‐8 SOP‐8 - 15 70 VIH VIL IIH IIL Low (Regulator ON) High (Regulator OFF) VLOGIC=2.5V (Regulator OFF) VLOGIC=0.5V (Regulator ON) DC θJA Junction to Case Junction to ambient - 100 0 3.6 5 50 100 173 173 1.4 1.5 KHz - % 50 30 200 300 - A μA mA nA V μA o C/W ON/OFF Control ON/OFF Pin Logic Input Threshold Voltage ON/OFF Pin Input Current 2.0 - 1.4 6 0.02 0.6 15 5 V μA Notes: 1. Absolute Maximum Ratings indicate limits beyond which damage to the device may occur. Operating Ratings indicate conditions for which the V1.1 3 August 2014 RS6501 2. 3. 4. 5. 6. 7. 8. 9. device is intended to be functional, but do not guarantee specific performance limits. For guaranteed specifications and test conditions, see the Electrical Characteristics. External components such as the catch diode, inductor, input and output capacitors, and voltage programming resistors can affect switching regulator system performance. Typical numbers are at 25 oC and represent the most likely norm. The switching frequency is reduced when the second stage current limit is activated. No diode, inductor or capacitor connected to output pin. Feedback pin removed from output and connected to 0V to force the output transistor switch ON. Feedback pin removed from output and connected to 12V for the 3.3V, 5V, ADJ. version, and 15V for the 12V version, to force the output transistor switch OFF. VIN=40V. Junction to ambient thermal resistance. (With copper area of approximately 3in2) V1.1 4 August 2014 RS6501 CHARACTERISTICS CURVE Shutdown Quiescent Current Normalized Output Voltage 160 1.5 ILOAD=200mA 120 Current (uA) Output Voltage Change (%).. 140 VIN=12V 1 0.5 0 100 VON/VOFF=5V 80 TJ=25oC 60 -0.5 40 -1 20 0 -1.5 0 25 50 75 100 125 150 0 175 10 20 30 Supply Voltage (V) o Junction Temperature ( C) 40 Switch Current Limit 6.00 Switch Saturation Voltage 1.30 VIN=12V TJ=25oC 5.80 1.20 Saturation Voltage (V) Switch Current Limit (A) 5.90 5.70 5.60 VIN=12V 5.50 VOUT =5V 5.40 1.10 1.00 0.90 5.30 5.20 0 25 50 75 100 125 150 0.80 o Junction Temperature ( C) 0 1 2 3 4 Switch Current (A) On/Off Pin Current (Sinking) 12 Current (uA) 10 VIN=40V 8 TJ=25oC 6 4 2 0 0 5 10 15 20 25 30 On/Off Pin Voltage (V) V1.1 5 August 2014 RS6501 PACKAGE INFORMATION 8 PINS, SOP, 150MIL Symbol A A1 A2 b c e D E E1 L1 θ Dimensions(mm) Nom. 1.60 0.15 1.40 1.27 BSC 4.90 6.00 3.90 1.04 REF - Min. 1.35 0.08 1.20 0.33 0.17 4.70 5.80 3.70 0° Max. 1.77 0.28 1.65 0.51 0.26 5.10 6.20 4.10 8° Notes: 1. All units are in millimeter 2. Refer to JEDEC MS‐012. V1.1 6 August 2014 RS6501 IMPORTANT NOTICE Princeton Technology Corporation (PTC) reserves the right to make corrections, modifications, enhancements, improvements, and other changes to its products and to discontinue any product without notice at any time. PTC cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a PTC product. No circuit patent licenses are implied. Princeton Technology Corp. 2F, 233-1, Baociao Road, Sindian Dist., New Taipei City 23145, Taiwan Tel: 886-2-66296288 Fax: 886-2-29174598 http://www.princeton.com.tw V1.1 7 August 2014