MIC33153

Product Summary

The MIC33153 is a high-efficiency 4MHz 1.2A synchronous buck regulator with an inner inductor, HyperLight LoadTM mode, Power Good (PG) output indicator, and programmable soft start. HyperLight LoadTM supports very high efficiency at light loads and supper-fast transient response which makes the MIC33153 perfectly suited for supporting processor core voltages. An additional benefit of this proprietary architecture is very low output ripple voltage throughout the entire load range with the use of small output capacitors.
The MIC33153 is designed so that only two external capacitors as small as 2.2μF are needed for stability. This gives the MIC33153 the ease of use of an LDO with the efficiency of a HyperLight LoadTM DC converter. The MIC33153 achieves efficiency in HyperLight Load TM mode as high as 85% at 1mA, with a very low quiescent current of 22μA. At higher loads, the MIC33153 provides a constant switching frequency up to 4MHz.

Parametrics

The absolute maximum ratings of MIC33153 are
(1)Supply Voltage (VIN):03V to 6V;
(2)Sense Voltage (VSNS) :03V to VINOutput Switch Voltage (VSW) :03V to VINEnable Input Voltage (VEN):03V to VIN;
(3)Power Good (PG) Voltage (VPG) :03V to VIN;
(4)Storage Temperature Range:65°C to +150°C;
(5)Lead Temperature (soldering, 10 sec) 260°C;
(6)ESD Rating:ESD Sensitive

Features

The features of MIC33153 can be summarized as
(1)Internal inductor - Simplifies design ttwexternal capacitors;
(2)Input voltage: 2.7V t5.5V;
(3)Output voltage: fixed or adjustable (0.62V t3.6V);
(4)Up t1.2 A output current;
(5)Up t93% peak efficiency;
(6)85% typical efficiency at 1mA;
(7)Power Good (PG) output;
(8)Programmable soft start;
(9)22-A typical quiescent current;
(10)4MHz PWM operation in continuous mode;
(11)Ultra-fast transient response;
(12)Low ripple output voltage - 35mVpp ripple in HyperLight Load - mode - 7mV output voltage ripple in full PWM mode;
(13)0.01-A shutdown current;
(14)Thermal shutdown and current limit protection;
(15)14-pin 3.0 x 3.5 x 1.1mm MLF- package ;
(16)-40°C t+125°C junction temperature range

Diagrams

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