LM3203TLX National Semiconductor Corporation, LM3203TLX Datasheet
LM3203TLX
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LM3203TLX Summary of contents
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... The LM3203 is available in a 10-pin lead free micro SMD package. A high switching frequency (2MHz) allows use of tiny surface-mount components. Typical Application © 2005 National Semiconductor Corporation Features n 2MHz (typ.) PWM Switching Frequency n Operates from a single Li-Ion cell (2.7V to 5.5V) n Adjustable Output Voltage (0.8V to 3.6V) ...
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... Connection Diagrams Top View Order Information Order Number LM3203TL LM3203TLX Note: The package marking “XY” designates the date code. “TT” NSC internal code for die traceability. Pin Description Pin # Name A1 V Analog Supply Input. A 0.1 µF ceramic capacitor is recommended to be placed as close to this DD pin as possible ...
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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 SGND DD IN PGND to SGND EN, FB, BYP, V CON SW, BYPOUT PV to ...
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Electrical Characteristics type apply over the full operating ambient temperature range (−30˚C ≤ T specifications apply to the LM3203 with: PV Symbol Parameter Gain Gain CON OUT Z V Input Resistance V CON CON System Characteristics range ...
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Typical Performance Characteristics 25˚C, unless otherwise noted) Quiescent Current vs Supply Voltage (V = 0.267V 2V, No Load) CON Switching Frequency Variation vs Temperature (V = 1.5V 200 mA) OUT OUT Output Voltage vs Temperature (V ...
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Typical Performance Characteristics 25˚C, unless otherwise noted) (Continued) Open/Closed Loop Current Limit vs Temperature (PWM Mode) Low V Voltage vs Output Voltage CON (R = 15Ω) LOAD www.national.com (Circuit in Figure Output Voltage vs Output ...
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Typical Performance Characteristics 25˚C, unless otherwise noted) (Continued) Efficiency vs Output Current (V = 1.5V 0.5V) OUT CON Logic High Threshold Voltage Load Transient Response (V = 1.5V 0.5V) OUT CON (Circuit in Figure 1, PV ...
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Typical Performance Characteristics 25˚C, unless otherwise noted) (Continued) Startup (V = 4.2V 3.4V, 10Ω) IN OUT Line Transient Response (V = 3.0V to 3.6V) IN Timed Current Limit Response (normal operation to short circuit) www.national.com (Circuit in Figure ...
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Typical Performance Characteristics 25˚C, unless otherwise noted) (Continued) Output Voltage Ripple (V = 3.25V 1.08V) OUT CON R vs Temperature DSON (P-FET Temperature DSON (Bypass FET) (Circuit in Figure Output Voltage ...
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Block Diagram Operation Description The LM3203 is a simple, step-down DC-DC converter with a bypass switch, optimized for powering RF power amplifiers (PAs) in mobile phones, portable communicators, and similar battery powered RF devices designed to allow the ...
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Operation Description FIGURE 1. Typical Operating System Circuit where baseband controls the output voltage using a DAC Circuit Operation Referring to Figure 1, the LM3203 operates as follows. Dur- ing the first part of each switching cycle, the control block ...
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Shutdown Mode < Setting the EN digital pin low ( 0.4V) places the LM3203 in a 0.1µA (typ.) Shutdown mode. During shutdown, the PFET switch, NFET synchronous rectifier, reference voltage source, control and bias circuitry of the LM3203 are turned ...
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Application Information INDUCTOR SELECTION A 3.3µH inductor with saturation current rating over 940mA is recommended for almost all applications. The inductor resis- tance should be less than 0.3Ω for better efficiency. Table 1 lists suggested inductors and suppliers. TABLE 1. ...
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Application Information 1. Place the LM3203 on 10.82 mil pads thermal relief, connect to each pad with a 7 mil wide, approximately 7 mil long traces, and when incrementally increase each trace to its optimal width. The important ...
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Physical Dimensions inches (millimeters) unless otherwise noted National does not assume any responsibility for use of any circuitry described, no circuit patent licenses are implied and National reserves the right at any time without notice to change said circuitry and ...