MIC2204 Micrel Semiconductor, MIC2204 Datasheet
MIC2204
Available stocks
Related parts for MIC2204
MIC2204 Summary of contents
Page 1
... CPU cores and RF circuitry in high- performance cellular phones and PDAs. The MIC2204 is available in 10-pin MSOP and 3mm 3mm MLF™-10L package options with an operating junction tem- perature range from – 125 C . ...
Page 2
... Switch (Output): Internal power MOSFET output switches. Supply Voltage (Input): Requires bypass capacitor to GND. SYNC_IN for the MIC2204: Sync the main switching frequency to an external clock. Tie pin to ground if not using this function. Tying SYNC_IN high reduces the switching frequency to 1.6MHz (See “Applications Informa- tion” ...
Page 3
... MIC2204 Absolute Maximum Ratings Supply Voltage (V ) ....................................................... 6V IN Output Switch Voltage (V ) .......................................... 6V SW Logic Input Voltage ( SYNC_IN (2) Power Dissipation Storage Temperature (T ) ....................... – +150 C S Electrical Characteristics with 3.5V, unless otherwise noted. Bold values indicate –40 C < Parameter Condition ...
Page 4
... MIC2204 Typical Characteristics Efficiency vs. Output Current 100 3. 1.8V 55 OUT 50 OUTPUT CURRENT (mA) Output Voltage vs. Output Current 1.01 1.0075 1.005 1.0025 1 0.9975 0.995 0.9925 0.99 0 0.1 0.2 0.3 0.4 0.5 OUTPUT CURRENT (A) Bias Supply vs. Temperature 2.32 2.318 2.316 2.314 2.312 2.31 2.308 2.306 2.304 2.302 -40 - 100 120 ...
Page 5
... MIC2204 Functional Characteristics Enable Transient TIME (40 s/div.) Line Transient TIME (200 s/div.) January 2004 OUT OUT 500mA OUT Switch Node Output Ripple 500mA IN OUT 4 X5R OUT TIME (400ns/div.) 5 Disable Transient ...
Page 6
... MIC2204 Block Diagram SYNC_OUT Oscillator SYNC_IN Ramp Generator BIAS Internal Supply 1. M0214-012904 C IN PWM Comparator Error Amplifier Driver MIC2204 Block Diagram VIN SW C OUT MIC2204 PGND January 2004 Micrel V OUT ...
Page 7
... BIAS The bias supply is an internal 2.3V linear regulator that supplies the internal biasing voltage to the MIC2204. A 10nF ceramic capacitor is required on this pin for bypassing. Do not use the BIAS pin as a supply. The BIAS pin was designed to supply internal power and not external circuitry ...
Page 8
... This reduces their ability to filter out high frequency noise. Output Capacitor The MIC2204 was designed specifically for the use of a 4.7 F ceramic output capacitor. The output capacitor requires either an X7R or X5R dielectric. Y5V and Z5U dielectric capacitors, aside from the undesirable effect of their wide variation in capacitance over temperature, become resistive at high frequencies ...
Page 9
... With a typical gain bandwidth of 200kHz, the MIC2204 is capable of extremely fast transient responses. The MIC2204 is designed to be stable with a 4.7 H inductor and a 4.7 F ceramic (X5R) output capacitor for output voltages greater than 1.6V. For output voltages less than 1.6V capacitor is required. Also, when a feed forward capacitor is used, the gain bandwidth is increased to unity gain ...
Page 10
... DC output voltage is achieved. As load or supply voltage changes, so does the duty cycle to maintain a constant output voltage. In cases where the input supply runs into a dropout condition, the MIC2204 will run at 100% duty cycle. The MIC2204 provides constant switching at 2MHz with synchronous internal MOSFETs. The internal MOSFETs ...
Page 11
... MIC2204 Package Information 3.15 (0.122) 2.85 (0.114) 0.30 (0.012) 0.15 (0.006) 0.50 BSC (0.020) DIMENSIONS: mm 3.00 BSC. 0.48 typ 0.20 dia 0.50 BSC. ODD TERMINAL SIDE MICREL, INC. 1849 FORTUNE DRIVE SAN JOSE, CA 95131 USA + 1 (408) 944-0800 TEL 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. ...