MIC94050/94051 Micrel MIC94050/94051 4-Terminal TinyFET™ P-Channel MOSFET Final General Description Features The MIC94050 and MIC94051 are 4-terminal silicon gate P-channel MOSFETs that provide low on-resistance in a very small package. Designed for high-side switch applications where space is critical, the MIC94050/1 exhibits an on-resistance of typically 0.125Ω at 4.5V gate-to-source voltage. The MIC94050/1 also operates with only 1.8V gate-to-source voltage. The MIC94050 is the basic 4-lead P-channel MOSFET. The MIC94051 is a variation that includes an internal gate pull-up resistor that can reduce the system parts count in many applications. The 4-terminal SOT-143 package permits a substrate connection separate from the source connection. This 4-terminal configuration improves the θJA (improved heat dissipation) and makes reverse-blocking switch applications practical. The small size, low threshold, and low RDS(on) make the MIC94050/1 the ideal choice for PCMCIA, USB, back-up battery-power, and distributed power management applications. • 0.125Ω typical on-resistance at 4.5V gate-to-source voltage • Operates with 1.8V gate-to-source voltage • Separate substrate connection allows reverse-blocking Pin Configuration Typical PCB Layout Applications • • • • • • • Distributed power management PCMCIA card power management USB ports Battery-powered computers, peripherals Handheld bar-code scanners Portable communications equipment Reverse blocking battery management Ordering Information Part Number Temperature Range* Package MIC94050BM4 –40°C to +150°C SOT-143 MIC94051BM4 –40°C to +150°C SOT-143 * Operating Junction Temperature PCB heat sink plane improves heat dissipation D Drain Substrate SS Part Number Part Identification P5x Gate Identification MIC94050BM4 P50 MIC94051BM4 P51 Source SOT-143 Package (M4) G Schematic Symbol S PCB traces Functional Diagrams S S ~350kΩ Source Gate G Substrate SS Drain D Schematic Symbol MIC94050 G Internal gate-to-source pull-up resistor SS D MIC94051 TinyFET is a trademark of Micrel, Inc. Micrel, Inc. • 1849 Fortune Drive • San Jose, CA 95131 • USA • tel + 1 (408) 944-0800 • fax + 1 (408) 944-0970 • http://www.micrel.com July 2002 1 MIC94050/94051 MIC94050/94051 Micrel Absolute Maximum Ratings Operating Ratings Drain-to-Source Voltage ................................................ –6V Gate-to-Source Voltage ................................................ –6V Continuous Drain Current TA = 25°C (VGS = 4.5V) ............................................ 1.8A TA = 100°C (VGS = 4.5V) .......................................... 1.2A Total Power Dissipation TA = 25°C ............................................................ 568mW TA = 100°C .......................................................... 227mW Operating Junction Temperature ............. –40°C to +150°C Storage Temperature ............................... –55°C to +150°C ESD Rating, Note 2 Thermal Resistance θJA ...................................................................................... 220°C/W θJC ..................................................................................... 130°C/W Electrical Characteristics (Note 1) Symbol Parameter Condition (Note 1) Min VGS Gate Threshold Voltage VDS = VGS, ID = –250µA 0.5 IGSS Gate-Body Leakage VDS = 0V, VGS = –4.5V, Note 2, Note 3 RGS Gate-Source Resistance VDS = 0V, VGS = –4.5V, Note 2, Note 4 CISS Input Capacitance VGS = 0V, VDS = –5.5V IDSS Zero Gate Voltage Drain Current VDS = –5.5V, VGS = 0V 1 µA VDS = –5.5V, VGS = 0V, TJ = 85°C 5 µA 0.160 0.180 0.200 0.280 Ω Ω Ω Ω RDS(ON) Drain-Source On-Resistance VGS = –4.5V, ID = –100mA VGS = –3.6V, ID = –100mA VGS = –2.5V, ID = –100mA VGS = –1.8V, ID = –100mA gFS Forward Transconductance VDS = –5.5V, ID = –200mA, Note 5 200 Typ 350 Max Units 1.2 V 1 µA 500 kΩ 600 0.125 0.135 0.165 0.225 pF 3 S Note 1. TA = 25°C unless noted. Substrate connected to source for all conditions. Note 2. ESD gate protection diode conducts during positive gate-to-source voltage excursions. IC devices are inherently ESD sensitive. Handling precautions required Note 3. MIC94050 only. Note 4. MIC94051 only. Note 5. Pulse Test: Pulse Width ≤ 80µs, Duty Cycle ≤ 0.5%. MIC94050/94051 2 July 2002 MIC94050/94051 Micrel Typical Characteristics 2.5VGS 4 3 2.0VGS 2 1 1.5VGS 0 0.5 0 July 2002 100µs Pulse 0 1 2 3 4 DRAIN-SOURCE CURRENT (A) 2.5VGS 200 100 4.2VGS 0 0 1.0 ID = –250µA 0.9 0.8 0.7 0.6 0.5 0.4 0.3 0.2 0.1 0.0 TEMPERATURE (°C) 3 3.3VGS 1 2 3 DRAIN CURRENT (A) 4 RDS(ON) Variance vs. Temperature Gate Threshold vs. Temperature GATE THRESHOLD (V) DRAIN-SOURCE DIODE VF (V) 1 300 ID = 100mA 0 1 2 3 4 5 6 GATE-TO-SOURCE VOLTAGE (V) Source Drain Diode Forward Voltage Drop vs. Current 1.5 400 300 0 0 1 2 3 4 5 DRAIN-TO-SOURCE VOLTAGE (V) 2 600 500 200 100 1.8VGS 400 ID = 1A 1.3 RDS(ON) (NORMALIZED) 6 5 800 700 -60 -40 -20 0 20 40 60 80 100 120 140 160 ID (A) 3.0VGS RDS(ON)(mΩ) 3.5VGS 2.5 500 1000 900 RDS(ON) (mΩ) 10 9 8 7 RDS(ON) vs. Drain Current On-Resistance vs. Gate-to-Source Voltage Drain Characteristics 1.2 1.1 1 0.9 0.8 VDS=3.6V ID=0.1A 0.7 -40 -15 10 35 60 85 110 135 TEMPERATURE (°C) MIC94050/94051 MIC94050/94051 Micrel Typical Applications SS* S D G On Off Load +5V MIC94050 74HC04 * Substrate must be connected to source Figure 1. Load Switch Application +5V G MIC94051 S SS* D Load Open Drain Output Internal Resistor * Substrate must be connected to source Figure 2. Load Switch Application (with internal gate-source pull-up) SS +4V MIC94050 A G On Off +2.7V to 3.6V Li Coin Cell A Off On Off On B Off Off On On Output 0V +4V Li Coin Cell don’t! 2MΩ SS S MIC94050 B D Load S D G On Off Figure 3. Reverse-Blocking Battery Back-Up Application MIC94050/94051 4 July 2002 MIC94050/94051 Micrel Package Information 0.950 (0.0374) TYP 1.40 (0.055) 2.50 (0.098) 1.20 (0.047) 2.10 (0.083) CL CL DIMENSIONS: MM (INCH) 1.12 (0.044) 0.81 (0.032) 3.05 (0.120) 2.67 (0.105) 8° 0° 0.10 (0.004) 0.013 (0.0005) 0.800 (0.031) TYP 0.400 (0.016) TYP 3 PLACES 0.150 (0.0059) 0.089 (0.0035) 0.41 (0.016) 0.13 (0.005) SOT-143 (M4) MICREL, INC. TEL 1849 FORTUNE DRIVE SAN JOSE, CA 95131 + 1 (408) 944-0800 FAX + 1 (408) 944-0970 WEB USA http://www.micrel.com This information is believed to be accurate and reliable, however no responsibility is assumed by Micrel for its use nor for any infringement of patents or other rights of third parties resulting from its use. No license is granted by implication or otherwise under any patent or patent right of Micrel, Inc. © 2002 Micrel, Incorporated July 2002 5 MIC94050/94051