lm2619atl National Semiconductor Corporation, lm2619atl Datasheet
lm2619atl
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lm2619atl Summary of contents
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... A high switching frequency (600kHz) allows use of tiny surface-mount com- ponents. The device features external compensation to tailor the re- sponse to a wide range of operating conditions. © 2003 National Semiconductor Corporation Key Specifications n Operates from a single LiION cell (2.8V to 5.5V) n Output voltage (1.5V to 3.6V) ± ...
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Typical Application Circuits www.national.com FIGURE 1. Typical Circuit for 1.8V Output Voltage FIGURE 2. Typical Circuit for 2.5V Output Voltage FIGURE 3. Typical Circuit for 1.5V Output Voltage 2 20057401 20057402 20057403 ...
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... Ordering Information Order Number Package Type LM2619ATL 10-bump Wafer Level Chip Scale (micro SMD) LM2619ATLX (*) XY - denotes the date code marking (2 digit) in production (*) TT - refers to die run/lot traceability for production (*) S - product line designator Package markings may change over the course of production. Pin Description ...
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Absolute Maximum Ratings If Military/Aerospace specified devices are required, please contact the National Semiconductor Sales Office/ Distributors for availability and specifications. PVIN, VDD to SGND PGND to SGND, PVIN to VDD EN, EAOUT, EANEG, SYNC/MODE to SGND FB, SW Electrical ...
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... Quiescent Supply Current vs Supply Voltage Output Voltage vs Supply Voltage (V = 1.5V, PWM MODE) OUT Output Voltage vs Output Current (V = 1.5V, PWM MODE) OUT LM2619ATL, Circuit of Figure 3, V Shutdown Quiescent Current vs Temperature (Circuit in Figure 3) 20057408 Output Voltage vs Supply Voltage (V OUT 20057409 Output Voltage vs Output Current (V ...
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... Typical Performance Characteristics otherwise noted. (Continued) Output Voltage vs Output Current (V = 3.6V, PWM MODE) OUT (Circuit in Figure 4) Switching Frequency vs Temperature (Circuit in Figure 3, PWM MODE) www.national.com LM2619ATL, Circuit of Figure 3, V Dropout Voltage vs Output Current (V OUT (Circuit in Figure 4) 20057432 Feedback Bias Current vs Temperature (Circuit in Figure 3) 20057423 6 = 3.6V 25˚ ...
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... Fixed-frequency PWM operation offers full output current capability at high efficiency while minimiz- ing interference with sensitive IF and data acquisition cir- cuits. During standby operation, hysteretic PFM mode re- LM2619ATL, Circuit of Figure 3, V Efficiency vs Output Current (V = 1.5V, PWM MODE, with Diode) OUT ...
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Device Information (Continued) external components. Board area required for implementa tion is only 0.58in (375mm ). Use of a micro-SMD package requires special design con- siderations for implementation. (See Micro SMD Package FIGURE 4. Typical Operating Circuit for ...
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Device Information (Continued) PWM OPERATION While in PWM (Pulse Width Modulation) mode, the output voltage is regulated by switching at a constant frequency and then modulating the energy per cycle to control power to the load. Energy per cycle is ...
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Device Information (Continued) PFM Mode Switching Waveform A: Inductor Current, 500mA/div B: SW Pin, 2V/div 50mV/div, AC Coupled OUT FIGURE 7. PFM OPERATION Connecting the SYNC/MODE to SGND sets the LM2619 to hysteretic PFM operation. While in ...
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Device Information (Continued) less than the 2.8V minimum operating voltage. The LM2619 is designed for compact portable applications, such as mo- bile phones. In such applications, the system controller de- termines power supply sequencing. Although the LM2619 is typically well ...
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Application Information SETTING THE OUTPUT VOLTAGE The LM2619 can be used with external feedback resistors to set the output voltage.Select the value allow atleast 100 times the feedback pin bias current to flow through it ...
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Application Information The input filter capacitor supplies current to the PFET switch of the LM2619 in the first part of each cycle and reduces voltage ripple imposed on the input power source. The out- put filter capacitor smoothes out current ...
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Application Information 7. Place noise sensitive circuitry, such as radio IF blocks, away from the DC-DC converter, CMOS digital blocks and other noisy circuitry. Interference with noise- sensitive circuitry in the system can be reduced through distance. In mobile phones, ...
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... NATIONAL’S PRODUCTS ARE NOT AUTHORIZED FOR USE AS CRITICAL COMPONENTS IN LIFE SUPPORT DEVICES OR SYSTEMS WITHOUT THE EXPRESS WRITTEN APPROVAL OF THE PRESIDENT AND GENERAL COUNSEL OF NATIONAL SEMICONDUCTOR CORPORATION. As used herein: 1. Life support devices or systems are devices or systems which, (a) are intended for surgical implant ...