MIC2196 Micrel Semiconductor, MIC2196 Datasheet
MIC2196
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MIC2196 Summary of contents
Page 1
... Micrel’s MIC2196 is a high efficiency PWM boost control IC housed in a SO-8 package. The MIC2196 is optimized for low input voltage applications. With its wide input voltage range of 2.9V to 14V, the MIC2196 can be used to efficiently boost voltages in 3.3V, 5V, and 12V systems, as well 2-cell Li Ion battery powered applications. Its powerful 2 driver allows the MIC2196 to drive large external MOSFETs ...
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... MIC2196YM Pin Configuration Pin Description Pin Number Pin Name 1 COMP EN/UVLO VDD 6 GND 7 OUTN 8 VIN MIC2196 Output Voltage Frequency Junction Temp. Range Adjustable 400KHz – +125 C COMP 1 8 VIN OUTN EN/UVLO 3 6 GND VDD 8 Lead SOIC (M) Pin Function Compensation (Output): Internal error amplifier output ...
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... IN TJ +125 C Min Typ Max 1.233 1.245 1.258 1.220 1.245 1.270 50 +0.08 –1.2 1.208 1.282 1 2 0.5 5 2.82 3.0 3.18 0.1 2.65 100 0.6 0.9 1.2 1.4 1.5 1.6 0 110 130 20 3.7 360 400 440 85 165 0.3 90 MIC2196 Micrel Units V/V V/V kHz % ns V kHz ...
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... The maximum allowable power dissipation is a function of the maximum junction temperature the junction-to-ambient thermal resistance, J(Max) Note 2. The device is not guaranteed to function outside its operating rating. Note 3. Devices are ESD sensitive, handling precautions required. Human body model, 1.5k in series with 100pF. MIC2196 = 3300pF = 12V IN = 12V ...
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... INPUT VOLTAGE (V ) INA Frequency vs. Temperature 450 440 IN 430 420 410 400 390 380 370 360 350 -40 - 100 120 TEMPERATURE ( C) Enable Pin vs. Input Voltage 200 150 100 INPUT VOLTAGE (V) MIC2196 ...
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... An internal correc- tive ramp provides slope compensation for stable operation above a 50% duty cycle. The controller is optimized for high- efficiency, high-performance DC-DC converter applications. Figure 1 shows a block diagram of the MIC2196 configured as a PWM boost converter. MIC2196 C ...
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... Figure 3. August 2004 V IN Gate Driver Figure 3: PWM Control Loop A block diagram of the MIC2196 PWM current mode control Inductor Current @ loop is shown in Figure 1. The inductor current is sensed by 1A/div measuring the voltage across a resistor, R sense amplifier buffers and amplifies this signal. A ramp is ...
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... The current sense pin, CS, is noise sensitive due to the low signal level. The current sense voltage measurement is referenced to the signal ground pin of the MIC2196. The current sense resistor ground should be located close to the IC ground. Make sure there are no high currents flowing in this trace ...
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... decoupling capacitor is used to stabilize the internal regulator and minimize noise on the VDD pin. Placement of this capacitor is critical to the proper operation of the MIC2196. It must be next to the VDD and signal ground pins and routed with wide etch. The capacitor should be a good quality ceramic ...
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... The significant contributors to power loss at higher output loads are (in approximate order of magnitude): • Resistive on-time losses in the MOSFET • Switching transition losses in the MOSFET • Inductor resistive losses MIC2196 • Current sense resistor losses • Output capacitor resistive losses (due to the capacitor’s ESR minimize power loss under heavy loads: • ...
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... August 2004 MAX) PIN 1 DIMENSIONS: INCHES (MM) 0.020 (0.51) 0.013 (0.33) 0.050 (1.27) TYP 0.0098 (0.249) 0.0040 (0.102) 0 –8 0.197 (5.0) 0.189 (4.8) SEATING PLANE 8-Pin SOIC ( (408) 474-1000 FAX © 2004 Micrel Incorporated 11 45 0.010 (0.25) 0.007 (0.18) 0.050 (1.27) 0.016 (0.40) 0.244 (6.20) 0.228 (5.79) http://www.micrel.com WEB Micrel MIC2196 ...