MIC4421A

MIC4421A MICREL | Alldatasheet

Document overview

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• PDF pages: 13

Technical content

Features

• High peak-output current: 9A Peak (typ.)
• Wide operating range: 4.5V to 18V (typ.)
• Minimum pulse width: 50ns
• Latch-up proof: fully isol ated process is inherently immune to any latch-up
• Input will withstand negativ e swing of up to 5V
• High capacitive load drive: 47,000pF
• Low delay time: 15ns (typ.)
• Logic high input for any voltage from 2.4V to V S
• Low equivalent input capacitance: 7pF (typ.)
• Low supply current: 500µA (typ.)
• Output voltage swing to within 25mV of GND or V S

Applications

• Switch mode power supplies
• Motor controls
• Pulse transformer driver
• Class-D switching amplifiers
• Line drivers
• Driving MOSFET or IGBT parallel chip modules
• Local power ON/OFF switch
• Pulse generators Typical Application On Off VS OUT OUT MIC4422A 1µF Si9410DY* N-Channel MOSFET Load Voltage Load 0.1µF VS GNDIN 2 4,5 VS +15V 0.1µF * Siliconix 30m, 7A max. † Load voltage limited by MOSFET drain-to-source rating Low-Side Power Switch

Micrel, Inc. MIC4421A/4422A June 2007 2 M9999-062707

Ordering Information

Configuration Temperature Range Package MIC4421AAM* Inverting –55° to +125°C 8-Pin SOIC MIC4421ABM MIC4421AYM Inverting –40° to +85°C 8-Pin SOIC MIC4421ACM MIC4421AZM Inverting 0° to +70°C 8-Pin SOIC MIC4421ABN MIC4421AYN Inverting –40° to +85°C 8-Pin PDIP MIC4421ACN MIC4421AZN Inverting 0° to +70°C 8-Pin PDIP MIC4421ACT MIC4421AZT Inverting 0° to +70°C 5-Pin TO-220 MIC4422AAM* Non-Inverting –55° to +125°C 8-Pin SOIC MIC4422ABM MIC4422AYM Non-Inverting –40° to +85°C 8-Pin SOIC MIC4422ACM MIC4422AZM Non-Inverting 0° to +70°C 8-Pin SOIC MIC4422ABN MIC4422AYN Non-Inverting –40° to +85°C 8-Pin PDIP MIC4422ACN MIC4422AZN Non-Inverting 0° to +70°C 8-Pin PDIP MIC4422ACT MIC4422AZT Non-Inverting 0° to +70°C 5-Pin TO-220 * Special order. Contact factory. Pin Configuration VS OUT OUT GND VS IN NC GND TAB

5 OUT

4 GND

2 GND

8-Pin PDIP (N) 8-Pin SOIC (M) 5-Pin TO-220 (T) Pin Description Pin Number DIP, SOIC Pin Number TO-220-5 Pin Name Pin Name 2 1 IN Control Input. 4, 5 2, 4 GND Ground: Duplicate pins must be externally connected together. 1, 8 3, TAB VS Supply Input: Duplicate pins must be externally connected together. 6, 7 5 OUT Output: Duplicate pins must be externally connected together. 3 — NC Not connected.

Micrel, Inc. MIC4421A/4422A June 2007 3 M9999-062707 Absolute Maximum Ratings(1) Power Dissipation, TA < +25°C(4) Operating Ratings(2) Ambient Temperature (TA) Package Thermal Resistance(4)

Electrical Characteristics

TA = 25°C with 4.5V ≤ VS ≤ 18V, bold values indicate –55°C< TA < +125°C, unless noted. Symbol Parameter Condition Min Typ Max Units Power Supply VS Operating Input Voltage 4.5 18 V High Output Quiescent Current V IN = 3V (MIC4422A), VIN = 0 (MIC4421A) 0.5 1.5 mA mA IS Low Output Quiescent Current V IN = 0V (MIC4422A), VIN = 3V (MIC4421A) 50 150 200 µA µA Input VIH Logic 1 Input Voltage See Figure 3 3.0 2.1 V VIL Logic 0 Input Voltage See Figure 3 1.5 0.8 V VIN Input Voltage Range –5 VS+0.3 V IIN Input Current 0V ≤ VIN ≤ VS –10 10 µA Output VOH High Output Voltage See Figure 1 VS+.025 V VOL Low Output Voltage See Figure 1 0.025 V Output Resistance, Output High IOUT = 10mA, VS = 18V 0.6 1.0 3.6 Ω Ω RO Output Resistance, Output Low IOUT = 10mA, VS = 18V 0.8 1.7 2.7 Ω Ω IPK Peak Output Current V S = 18V (See Figure 8) 9 A IDC Continuous Output Current 2 A IR Latch-Up Protection Withstand Reverse Current Duty Cycle ≤ 2% t ≤ 300µs, Note 5 >1500 mA Switching Time (Note 5) tR Rise Time Test Figure 1, C L = 10,000pF 20 75 120 ns ns tF Fall Time Test Figure 1, C L = 10,000pF 24 75 120 ns ns tD1 Delay Time Test Figure 1 15 68 ns ns

Micrel, Inc. MIC4421A/4422A June 2007 5 M9999-062707 Typical Characteristics

Micrel, Inc. MIC4421A/4422A June 2007 6 M9999-062707 Typical Characteristics (continued)

Figure 4. MIC4421A/22A Block Diagram Refer to the functional diagram. capacitors are recommended to decouple noise. cause unpredictable operation. which must sink 0.4mA from the two current sources. the first inverter up to its threshold. manufactured in inverting and non-inverting versions. will be floating (unpredictable).

supply voltage ranges. Input current is less than ±10µA. dissipation. This can improve performance and reliability. can be as high as 30mA p-p (6.4mARMS) with the input. change even if the input is driven from an AC source. input, ESD diode, and 1kΩ resistor. loads and/or operating at high frequency.

6 Amps

Figure 7. Switching Time Due to Negative Feedback The supply current vs. frequency and supply current vs. summing the three dissipation sources. 150°C, this package will dissipate 1478mW.

• Load Power Dissipation (PL)
• Quiescent power dissipation (PQ)
• Transition power dissipation (PT) Calculation of load power dissipation differs depending on whether the load is capacitive, resistive or inductive. Resistive Load Power Dissipation Dissipation caused by a resi stive load can be calculated as: P L = I2 RO D where: I = the current drawn by the load RO = the output resistance of the driver when the output is high, at the power supply voltage used. (See data sheet) D = fraction of time the load is conducting (duty cycle).

Table 1. MIC4421A Maximum Operating Frequency For inductive loads the situat ion is more complicated. typical characteristic curv e “Crossover Energy vs. CL = Load Capacitance in Farads. the input to the driver is high. f = Operating Frequency of the driver in Hertz. ID = Output current from a driver in Amps. PD = Total power dissipated in a driver in Watts.

second (frequency) to find Watts. O = Output resistance of a driver in Ohms. VS = Power supply voltage to the IC in Volts. Figure 8. Peak Output Current Test Circuit

Micrel, Inc. MIC4421A/4422A June 2007 12 M9999-062707

Package Information

0.380 (9.65) 0.125 (3.18) PIN 1 DIMENSIONS: INCH (MM) 0.018 (0.57) 0.100 (2.54) 0.013 (0.330 0.010 (0.254 0.300 (7.62) 0.255 (6.48) 0.245 (6.22) 0.380 (9.65) 0.320 (8.13) 0.0375 (0.952) 0.130 (3.30) 8-Pin Plastic DIP (N) 8-Pin SOIC (M)

Micrel, Inc. MIC4421A/4422A June 2007 13 M9999-062707 5-Pin TO-220 (T) 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 designed or authorized for use as components in life support appliances, devices or systems where malfunction of a product can 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.