MAX1536ETI+

MAXIM INTEGRATED PRODUCTS  MAX1536ETI+  直流-直流开关同步降压稳压器, 可调, 3V-5.5V输入, 700mV-5.5V/3.6A输出, 1.4MHz, TQFN-28

The is a 3.6A, 1.4MHz, low voltage, internal-switch step down regulator with dynamic output voltage control in 28 pin TQFN package. The MAX1536 constant-off-time, pulse-width-modulatedPWM step-down DC to DC converter is ideal for use in +5.0V and +3.3V to low voltages for notebook and subnotebook computers. The MAX1536 features an internal PMOS power switch and internal synchronous rectification for high efficiency and reduced component count. No external Schottky diode is required across the internal synchronous rectifier switch. The internal 54mohm PMOS power switch and 47mohm NMOS synchronous-rectifier switch easily deliver continuous load currents up to 3.6A. The MAX1536 produces dynamically adjustable output voltages for chipsets and graphics processor cores using a logic-level control signal. The MAX1536 achieves efficiencies as high as 96%.

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Dynamically selectable output voltage from +0.7V to VIN

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Operating temperature range from -40°C to 85°C

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Maximum switching frequency is 1.4MHz

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Reference output is 2V ±0.75%

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Unique current-mode, constant-off time, PWM control scheme

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Selectable idle mode/PWM operation at light loads

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Digital soft-start , a 100% duty-cycle mode for low dropout operation & low-power shutdown mode

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Shutdown supply current is 1µA & quiescent supply current is 750µA

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Accuracy over line and load is 1% VOUT

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External reference input, power-good window comparator