MIC94050/94051 Micrel MIC94050/94051 4-Terminal SymFET™ P-Channel MOSFET General Description 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 pullup resistor that can reduce the system parts count in many applications. SymFET™ Features • 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 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. 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 Temp. Range* Package Pb-FREE MIC94050BM4 –40°C to +150°C SOT-143 NO MIC94051BM4 –40°C to +150°C SOT-143 NO MIC94050YM4 –40°C to +150°C SOT-143 YES MIC94051YM4 –40° to +150°C SOT-143 YES * Operating Junction Temperature Pin Configuration Drain Part Identification Typical PCB Layout Part Number P5x Gate Source PCB heat sin k plane improves heat dissipation SS D Substrate Identification MIC94050BM4 P50 MIC94051BM4 P51 MIC94050YM4 P50 MIC94051YM4 P51 SOT-143 Package (M4) G Schematic Symbol S PCB traces Functional Diagrams S S Gate Source ~350kΩ G Substrate Drain SS D Schematic Symbol MIC94050 G Internal gate-to-source pull-up resistor SS D MIC94051 SymFET 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 January 2007 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 VGS Gate Threshold Voltage IGSS RGS CISS Gate-Body Leakage Gate-Source Resistance Input Capacitance IDSS Zero Gate Voltage Drain Current RDS(ON) Drain-Source On-Resistance gFS Forward Transconductance Note 1. Note 2. Condition (Note 1) Min VDS = VGS, ID = –250µA 0.5 VDS = 0V, VGS = –4.5V, Note 2, Note 4 200 VDS = 0V, VGS = –4.5V, Note 2, Note 3 VGS = 0V, VDS = –5.5V Typ 350 VGS = –4.5V, ID = –100mA VGS = –3.6V, ID = –100mA VGS = –2.5V, ID = –100mA VGS = –1.8V, ID = –100mA VDS = –5.5V, ID = –200mA, Note 5 0.125 0.135 0.165 0.225 3 Units 1.2 V 1 µA 500 kΩ 600 VDS = –5.5V, VGS = 0V VDS = –5.5V, VGS = 0V, TJ = 85°C Max pF 1 µA 5 µA 0.160 0.180 0.200 0.320 Ω Ω Ω Ω S TA = 25°C unless noted. Substrate connected to source for all conditions. ESD gate� precautions required Note 3. MIC94050 only. Note 4. MIC94051 only. Note 5. Pulse Test: Pulse Width ≤ 80µs, Duty Cycle ≤ 0.5%. MIC94050/94051 2 January 2007 MIC94050/94051 Micrel Typical Characteristics 1000 900 800 3.5VGS 4 2.0VGS 3 2 1 1.5VGS 0 300 200 100 1.5 1 0.5 0 100µs Pulse 0 1 2 3 4 DRAIN-SOURCE CURRENT (A) January 2007 GATE THRESHOLD (V) DRAIN-SOURCE DIODE VF (V) 2 1.0 0.9 0.8 0.7 300 200 0 ID = –250µA 0.6 0.5 0.4 0.3 0.2 0.1 0.0 TEMPERATURE (°C) 4.2VGS 0 3.3VGS 1 2 3 DRAIN CURRENT (A) 4 RDS(ON) Variance vs. Temperature Gate Threshold vs. Temperature 3 2.5VGS 100 ID = 100mA 0 1 2 3 4 5 6 GATE-TO-SOURCE VOLTAGE (V) Source Drain Diode Forward Voltage Drop vs. Current 1.8VGS 400 0 0 1 2 3 4 5 DRAIN-TO-SOURCE VOLTAGE (V) 2.5 ID = 1A RDS(ON) vs. Drain Current 500 1.3 RDS(ON) (NORMALIZED) 2.5VGS 700 600 500 400 -60 -40 -20 0 20 40 60 80 100 120 140 160 3.0VGS 7 6 5 RDS(ON)(mΩ) ID (A) 10 9 8 On-Resistance vs. Gate-to-Source Voltage RDS(ON) (mΩ) Drain Characteristics 1.2 1.1 1 0.9 0.8 V =3.6V DS ID=0.1A 0.7 -40 -15 10 35 60 85 110 135 TEMPERATURE (°C) MIC94050/94051 MIC94050/94051 Micrel Typical Applications SS* +5V MIC94050 D G On Off Load S 74HC04 * Substrate must be connected to source Figure 1. Load Switch Application +5V Internal Resistor Open Drain Output G D SS* Load MIC94051 S * Substrate must be connected to source Figure 2. Load Switch Application (with internal gate-source pull-up) SS A S MIC94050 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 S S S MIC94050 B D Load +4V D G On Off Figure 3. Reverse-Blocking Battery Back-Up Application MIC94050/94051 4 January 2007 MIC94050/94051 Micrel Package Information SOT-143 (M4) MICREL, INC. 2180 FORTUNE DRIVE SAN JOSE, CA 95131 USA TEL + 1 (408) 944-0800 FAX + 1 (408) 474-1000 WEB http://www.micrel.com The information furnished by Micrel in this data sheet is believed to be accurate and reliable. However, no responsibility is assumed by Micrel for its use. Micrel reserves the right to change circuitry and specifications at any time without notification to the customer. Micrel Products are not� reasonably be expected to result in personal injury. Life support devices or systems are devices or systems that (a) are intended for surgical implant into the body or (b) support or sustain life, and whose failure to perform can be reasonably expected to result in a significant injury to the user. A Purchaser’s use or sale of Micrel Products for use in life support appliances, devices or systems is a Purchaser’s own risk and Purchaser agrees to fully indemnify Micrel for any damages resulting from such use or sale. © 2002 Micrel, Incorporated January 2007 5 MIC94050/94051