MIC2025/2075 Micrel, Inc. MIC2025/2075 Single-Channel Power Distribution Switch MM8® General Description Features Applications Typical Application VCC 2.7V to 5.5V 10k Logic Controller VIN 1µF ON/OFF OVERCURRENT GND MIC2025/75 EN OUT FLG IN GND OUT NC Load NC 0.1µF Micrel, Inc. • 2180 Fortune Drive • San Jose, CA 95131 • USA • tel + 1 (408) 944-0800 • fax + 1 (408) 474-1000 • http://www.micrel.com MIC2025/2075 Micrel, Inc. Ordering Information Pin Configuration MIC2025/75 EN 1 8 OUT FLG 2 7 IN GND 3 6 OUT NC 4 5 NC 8-Lead SOIC (BM) 8-Lead MSOP (BMM) Pin Description Pin Number Pin Name Pin Function MIC2025/2075 Micrel, Inc. Absolute Maximum Ratings (Note 1) Operating Ratings (Note 2) θ θ Note 3 Electrical Characteristics bold Symbol Parameter Condition Min Typ Max Units 5 5 2.4 –1 1 140 160 10 1 6 0.5 5.9 2.2 2.7 2.0 2.5 Note 4 V MIC2025/2075 Symbol Micrel, Inc. Parameter Condition Min Note 1. Note 2. Note 3. Note 4. Test Circuit IOUT Device Under OUT Test VOUT RL CL Timing Diagrams tR tF 90% VOUT 90% 10% 10% Output Rise and Fall Times VE N 50% tO F F tON 90% VOUT 10% Active-Low Switch Delay Times (MIC20x5-2) VE N 50% tO F F tON VOUT 90% 10% Active-High Switch Delay Times (MIC20x5-1) Typ Max Units MIC2025/2075 Micrel, Inc. 180 160 ON-RESISTANCE (m) 160 5V 100 80 3.3V 60 40 20 100 5V 80 60 40 IOUT = 500mA 0 -40 -20 0 20 40 60 80 100 TEMPERATURE (C) Supply On-Current vs. Input Voltage On-Resistance vs. Input Voltage RESISTANCE (m) 150 -40C 100 50 +25C +85C 100 +25C 50 -40C 600 400 VIN = 5V 200 0 -40 -20 0 20 40 60 80 100 TEMPERATURE (C) CURRENT LIMIT (mA) 800 Short-Circuit Current-Limit vs. Input Voltage +25C 700 600 500 +85C -40C 400 300 200 100 0 2.5 3.0 3.5 4.0 4.5 5.0 INPUT VOLTAGE (V) 5.5 Current-Limit Threshold vs. Temperature 1200 1200 1100 1000 900 800 700 600 +85C -40C +25C 500 400 300 200 100 0 2.5 3.0 3.5 4.0 4.5 5.0 INPUT VOLTAGE (V) 1000 800 600 +85C 3.0 2.0 0 2.5 5.5 +25C -40C RL=10 CL=1F 3.0 3.5 4.0 4.5 5.0 INPUT VOLTAGE (V) 5.5 2.5 ENABLE THRESHOLD (V) VIN = 3.3V Turn-On Rise Time vs. Input Voltage 1.0 VIN = 3.3V VIN = 5V 400 200 0 -40 -20 0 20 40 60 80 100 TEMPERATURE (C) 2.0 Current-Limit Threshold vs. Input Voltage 1.5 1.0 0.5 2.5 5.5 VEN RISING VEN FALLING VIN = 5V 0 -40 -20 0 20 40 60 80 100 TEMPERATURE (C) ENABLE THRESHOLD (V) 800 3.0 3.5 4.0 4.5 5.0 INPUT VOLTAGE (V) CURRENT LIMIT THRESHOLD (mA) Short-Circuit Current-Limit vs. Temperature RL=10 CL=1F 5.0 +85C 0 2.5 5.5 VIN = 5V 4.0 150 CURRENT LIMIT THRESHOLD (mA) CURRENT LIMIT (mA) 1000 3.0 3.5 4.0 4.5 5.0 INPUT VOLTAGE (V) 2 0 -40 -20 0 20 40 60 80 100 TEMPERATURE (C) IOUT = 500mA 0 2.5 3 1 20 200 VIN = 3.3V 4 3.3V 0 -40 -20 0 20 40 60 80 100 TEMPERATURE (C) 200 CURRENT (A) 120 Turn-On Rise Time vs. Temperature 5 140 RISE TIME (ms) CURRENT (A) 140 120 On-Resistance vs. Temperature RISE TIME (ms) Supply On-Current vs. Temperature Enable Threshold vs. Input Voltage 2.0 1.5 1.0 0.5 0 2.5 VEN RISING VEN FALLING TA = 25C 3.0 3.5 4.0 4.5 5.0 INPUT VOLTAGE (V) 5.5 MIC2025/2075 3 5 VIN = 3.3V VIN = 5V 2 1 0 -40 -20 0 20 40 60 80 100 TEMPERATURE (C) 4 3 2 Flag Delay vs. Input Voltage 3.0 +85C UVLO THRESHOLD (V) 4 Flag Delay vs. Temperature DELAY TIME (ms) DELAY TIME (ms) 5 Micrel, Inc. +25C -40C 1 0 2.5 3.0 3.5 4.0 4.5 5.0 INPUT VOLTAGE (V) 5.5 2.5 2.0 1.5 UVLO Threshold vs. Temperature VIN RISING VIN FALLING 1.0 0.5 0 -40 -20 0 20 40 60 80 100 TEMPERATURE (C) MIC2025/2075 Micrel, Inc. Functional Characteristics UVLO—VIN Falling (MIC2025-1) VFLG VIN (2V/div.) (2V/div.) UVLO—VIN Rising (MIC2025-1) Turn-On Response (MIC2025-1) Turn-off Response (MIC2025-1) 640mA 144mA VIN = 5V CL = 147µF RL = 35 144mA TIME (2.5ms/div.) Inrush Current Response (MIC2025-1) Enable Into Short (MIC2025-1) VIN = 5V RL = 35 CL = 210µF CL = 110µF CL = 10µF TIME (1ms/div.) VFLG VEN (5V/div.) (10V/div.) TIME (1ms/div.) 3.1ms (tD) VIN = 5V VOUT IOUT (500mA/div.) (2V/div.) VFLG VEN (5V/div.) (10V/div.) IOUT (200mA/div.) VIN = 5V CL = 147µF RL = 35 VOUT VFLG VEN (5V/div.) (5V/div.) (10V/div.) TIME (25ms/div.) CL = 310µF IOUT (200mA/div.) VEN = VIN VIN = 5V CL = 57µF RL = 35 TIME (10ms/div.) IOUT (200mA/div.) VOUT VFLG VEN (5V/div.) (5V/div.) (10V/div.) IOUT (100mA/div.) VOUT (2V/div.) VEN = VIN VIN = 5V CL = 57µF RL = 35 2.3V VOUT IOUT (100mA/div.) (2V/div.) VFLG VIN (1V/div.) (1V/div.) 2.5V 640mA Short-Circuit Current TIME (1ms/div.) MIC2025/2075 Micrel, Inc. VFLG VIN (5V/div.) (10V/div.) Current-Limit Response (Ramped Load Into Short—MIC2025-1) VIN = 5V CL = 47µF Short-Circuit Current (650mA) Thermal Shutdown 640mA Short-Circuit Current TIME (100ms/div.) TIME (500ms/div.) Current-Limit Transient Response (MIC2025-1) Thermal Shutdown Response (Output Reset by Removing Load—MIC2075-1) VFLG VEN (5V/div.) (10V/div.) No Load VIN = 5V CL = 47µF IOUT (5A/div.) Current-Limit Threshold (780mA) VOUT (5V/div.) Short Removed Load VFLG (5V/div.) No Load VOUT (5V/div.) IOUT (500mA/div.) Current-Limit Transient Response (Enable Into Short—MIC2025-1) Load VOUT (5V/div.) VOUT (5V/div.) IOUT (5A/div.) IOUT (500mA/div.) VIN = 5V CL = 47µF 640mA Short-Circuit Current TIME (10ms/div.) Ramped Load to a Short VIN = 5V Enable Reset Output Reset VOUT (5V/div.) VFLG VEN (5V/div.) (10V/div.) Thermal Shutdown (Output Reset by Toggling Enable—MIC2075-1) Ramped Load to a Short RL = 35 Thermal Shutdown TIME (100ms/div.) RL = 35 Output is Reset (Load Removed) Thermal Shutdown TIME (100ms/div.) IOUT (500mA/div.) 24µs Output Latched Off VIN = 5V MIC2025/2075 Micrel, Inc. Block Diagram EN OSC. THERMAL SHUTDOWN 1.2V REFERENCE UVLO CHARGE PUMP IN CURRENT LIMIT GATE CONTROL FLAG RESPONSE DELAY OUT FLG GND Functional Description Power Dissipation Input and Output × ×θ Thermal Shutdown θ Current Sensing and Limiting Switch Enabled into Short-Circuit MIC2025/2075 Micrel, Inc. Fault Flag Short-Circuit Applied to Enabled Output Current-Limit Response—Ramped Load Undervoltage Lockout VE N Short-Circuit Faul t Load Removed (Output Reset) VOUT ILIMIT IDC IOUT Thermal Shutdown Reached VF L G tD Figure 1. MIC2075-2 Timing: Output Reset by Removing Load VE N Short-Circuit Faul t Load/Fault Removed VOUT ILIMIT IDC IOUT Thermal Shutdown Reached VF L G tD Figure 2. MIC2025-2 Timing MIC2025/2075 Micrel, Inc. Applications Information Universal Serial Bus (USB) Power Distribution Supply Filtering Printed Circuit Board Hot-Plug MIC2025-2 VC C 0.1 µF to "Hot" Receptacle 1 EN 2 OUT 8 FLG IN 7 3 GND OUT 6 4 NC NC 5 Backend Function CBULK GND Adaptor Card Figure 3. Hot Plug Application V+ Logic Controller OVERCURRENT 10k R C MIC2025 1 EN OUT 8 2 3 FLG IN 7 GND OUT 6 4 NC NC 5 Figure 4. Transient Filter MIC2025/2075 Micrel, Inc. VC C 5.0V 4.50V to 5.25V Upstream VB U S 100mA max. VB U S 10k 3.3V MIC5203-3.3 IN D+ 1µF D– 3.3V USB Controller VIN OUT 1µF GND GND Ferrite Beads MIC2025/75 ON/OFF EN OVERCURRENT GND VB U S OUT FLG IN GND OUT NC D+ 0.01µF 120µF D– GND NC USB Port 0.1µF Data Data Figure 5 USB Host Application 1.5k 3.3V USB Upstream Connector VB U S MIC5203-3.3 (LDO) IN D+ D– OUT USB Logic Controller VIN GND GND 0.1µF 0.1µF 1.5K ON/OFF OVERCURRENT GND Ferrite Beads MIC2025/75 EN FLG IN GND OUT NC VB U S OUT D+ 120µF 0.01µF D– GND NC 0.1µF Data Data Figure 6. USB Bus-Powered Hub USB Downstream Connector (Up to four ganaged ports) MIC2025/2075 Micrel, Inc. Package Information 8-Lead SOIC (M) MM8™ 8-Pin MSOP (MM) MIC2025/2075 Micrel, Inc. MICREL INC. TEL 2180 FORTUNE DRIVE FAX SAN JOSE, CA 95131 WEB USA
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