MAX1999EEI-T Maxim Integrated Products, MAX1999EEI-T Datasheet
MAX1999EEI-T
Specifications of MAX1999EEI-T
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MAX1999EEI-T Summary of contents
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... Ultrasonic Pulse-Skipping Mode (25kHz min) ♦ Power-Good (PGOOD) Signal ♦ Overvoltage Protection Enable/Disable PART MAX1777EEI MAX1777EEI+ -40°C to +85°C 28 QSOP MAX1977EEI MAX1977EEI+ -40°C to +85°C 28 QSOP MAX1999EEI MAX1999EEI+ -40°C to +85°C 28 QSOP +Denotes lead-free package. Applications Features Ordering Information PIN- TEMP RANGE SWITCHING PACKAGE FREQUENCY -40° ...
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High-Efficiency, Quad Output, Main Power- Supply Controllers for Notebook Computers ABSOLUTE MAXIMUM RATINGS V+, SHDN to GND ..................................................-0.3V to +25V BST_ to GND ..........................................................-0.3V to +30V LX_ to BST_ ..............................................................-6V to +0.3V CS_ to GND (MAX1777/MAX1977 only)......................-2V to +6V V ...
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High-Efficiency, Quad Output, Main Power- Supply Controllers for Notebook Computers ELECTRICAL CHARACTERISTICS (continued) (Circuit of Figure 1 and Figure 2, no load on LDO5, LDO3, OUT3, OUT5, and REF 12V, ON3 = ON5 = 0°C ...
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High-Efficiency, Quad Output, Main Power- Supply Controllers for Notebook Computers ELECTRICAL CHARACTERISTICS (continued) (Circuit of Figure 1 and Figure 2, no load on LDO5, LDO3, OUT3, OUT5, and REF 12V, ON3 = ON5 = 0°C ...
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High-Efficiency, Quad Output, Main Power- Supply Controllers for Notebook Computers ELECTRICAL CHARACTERISTICS (continued) (Circuit of Figure 1 and Figure 2, no load on LDO5, LDO3, OUT3, OUT5, and REF 12V, ON3 = ON5 = 0°C ...
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High-Efficiency, Quad Output, Main Power- Supply Controllers for Notebook Computers ELECTRICAL CHARACTERISTICS (continued) (Circuit of Figure 1 and Figure 2, no load on LDO5, LDO3, OUT3, OUT5, and REF 12.0.V, ON3 = ON5 = -40°C ...
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High-Efficiency, Quad Output, Main Power- Supply Controllers for Notebook Computers ELECTRICAL CHARACTERISTICS (continued) (Circuit of Figure 1 and Figure 2, no load on LDO5, LDO3, OUT3, OUT5, and REF 12.0.V, ON3 = ON5 = -40°C ...
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High-Efficiency, Quad Output, Main Power- Supply Controllers for Notebook Computers (Circuit of Figure 1 and Figure 2, no load on LDO5, LDO3, OUT3, OUT5, and REF 12V, ON3 = ON5 = 7mΩ ...
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High-Efficiency, Quad Output, Main Power- Supply Controllers for Notebook Computers (Circuit of Figure 1 and Figure 2, no load on LDO5, LDO3, OUT3, OUT5, and REF 12V, ON3 = ON5 = 7mΩ ...
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High-Efficiency, Quad Output, Main Power- Supply Controllers for Notebook Computers (Circuit of Figure 1 and Figure 2, no load on LDO5, LDO3, OUT3, OUT5, and REF 12V, ON3 = ON5 = 7mΩ ...
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High-Efficiency, Quad Output, Main Power- Supply Controllers for Notebook Computers (Circuit of Figure 1 and Figure 2, no load on LDO5, LDO3, OUT3, OUT5, and REF 12V, ON3 = ON5 = 7mΩ ...
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High-Efficiency, Quad Output, Main Power- Supply Controllers for Notebook Computers PIN NAME MAX1777 MAX1999 MAX1977 3.3V SMPS Current-Sense Input. Connect CS3 to a current-sensing resistor from the source of 1 — CS3 the synchronous rectifier to GND. The voltage at ...
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High-Efficiency, Quad Output, Main Power- Supply Controllers for Notebook Computers PIN NAME MAX1777 MAX1999 MAX1977 5V SMPS Current-Sense Input. Connect CS5 to a current-sensing resistor from the source of 13 — CS5 the synchronous rectifier to GND. The voltage at ...
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High-Efficiency, Quad Output, Main Power- Supply Controllers for Notebook Computers Typical Application Circuit The typical application circuits (Figures 1 and 2) gener- ate the 5V/5A and 3.3V/5A main supplies in a notebook computer. The input supply range ...
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High-Efficiency, Quad Output, Main Power- Supply Controllers for Notebook Computers 24V IN 4Ω 4.7µF 10µF 1 FDS6612A EP10QY03 N2 IRF7811AV ON OFF V CC REF *OPTIONAL CAPACITANCE BETWEEN LX AND PGND ...
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... LDO3 ON3 ON5 SHDN PRO Figure 3. Detailed Functional Diagram Idle Mode is a trademark of Maxim Integrated Products, Inc. 16 ______________________________________________________________________________________ Each step-down, power-switching circuit consists of two N-channel MOSFETs, a rectifier, and an LC output filter. The output voltage is the average AC voltage at the switching node, which is regulated by changing the duty cycle of the MOSFET switches ...
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High-Efficiency, Quad Output, Main Power- Supply Controllers for Notebook Computers Each PWM controller consists of a Dual Mode feedback network and multiplexer, a multi-input PWM comparator, high-side and low-side gate drivers, and logic. The MAX1777/MAX1977/MAX1999 contain fault-protection cir- cuits that ...
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High-Efficiency, Quad Output, Main Power- Supply Controllers for Notebook Computers These internal blocks are not powered directly from the battery. Instead, the 5V (LDO5) linear regulator steps down the battery voltage to supply both internal circuit- ry and the gate ...
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High-Efficiency, Quad Output, Main Power- Supply Controllers for Notebook Computers tinuous and discontinuous inductor-current operation (also known as the critical conduction point): × ⎛ OUT ⎜ LOAD SKIP ( ) × ⎝ where ...
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High-Efficiency, Quad Output, Main Power- Supply Controllers for Notebook Computers Reference and Linear Regulators (REF, LDO5, and LDO3) The 2V reference (REF) is accurate to ±1% over tem- perature, making REF useful as a precision system ref- erence. Bypass REF ...
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High-Efficiency, Quad Output, Main Power- Supply Controllers for Notebook Computers A negative current limit prevents excessive reverse inductor currents when V sinks current. The nega- OUT tive current-limit threshold is set to approximately 120% of the positive current limit and ...
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High-Efficiency, Quad Output, Main Power- Supply Controllers for Notebook Computers Adaptive dead-time circuits monitor the DL_ and DH_ drivers and prevent either FET from turning on until the other is fully off. This algorithm allows operation without shoot-through with a ...
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High-Efficiency, Quad Output, Main Power- Supply Controllers for Notebook Computers Table 3. Operating Mode Truth Table MODE CONDITION Power-Up LDO5 < UVLO threshold SHDN = high, ON3 or ON5 Run enabled Overvoltage Either output > 111% of nominal level, PRO ...
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High-Efficiency, Quad Output, Main Power- Supply Controllers for Notebook Computers below 0.8V clears the overvoltage, undervoltage, and thermal fault latches. Adjustable-Output Feedback Connect FB_ to GND to enable the fixed, preset SMPS output voltages (3.3V and 5V). Connect a resistive ...
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High-Efficiency, Quad Output, Main Power- Supply Controllers for Notebook Computers Inductor Selection The switching frequency (on-time) and operating point (% ripple or LIR) determine the inductor value as follows − OUT ...
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High-Efficiency, Quad Output, Main Power- Supply Controllers for Notebook Computers When using low-capacity filter capacitors such as polymer types, capacitor size is usually determined by the capacity required to prevent V SAG tripping the undervoltage and overvoltage fault latches during ...
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High-Efficiency, Quad Output, Main Power- Supply Controllers for Notebook Computers Power MOSFET Selection Most of the following MOSFET guidelines focus on the challenge of obtaining high load-current capability (>5A) when using high-voltage (>20V) AC adapters. Low-current applications usually require less ...
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High-Efficiency, Quad Output, Main Power- Supply Controllers for Notebook Computers an MBR0530 (500mA-rated) type for loads up to 1.5A, a 1N5819 type for loads 1N5822 type for loads up to 10A. The rectifier’s rated reverse ...
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High-Efficiency, Quad Output, Main Power- Supply Controllers for Notebook Computers Use of Coupled Inductors to Create Auxiliary Outputs A coupled inductor or transformer can be substituted for the inductor in the 5V or 3.3V SMPS to create an auxiliary output ...
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High-Efficiency, Quad Output, Main Power- Supply Controllers for Notebook Computers USE AGND PLANE TO: USE PGND PLANE TO: - BYPASS V AND REF - BYPASS LDO_ CC - TERMINATE EXTERNAL FB - CONNECT PGND TO THE TOPSIDE STAR GROUND DIVIDER ...
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High-Efficiency, Quad Output, Main Power- Supply Controllers for Notebook Computers 4) Make the DC-DC controller ground connections as follows: near the device, create a small analog ground plane. Connect the small analog ground plane to GND (Figure 13) and use ...
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... Maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim product. No circuit patent licenses are implied. Maxim reserves the right to change the circuitry and specifications without notice at any time. Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600 ____________________ 32 © 2004 Maxim Integrated Products PACKAGE OUTLINE, QSOP .150" ...