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LM3262 Datasheet(PDF) 1 Page - Texas Instruments |
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LM3262 Datasheet(HTML) 1 Page - Texas Instruments |
1 / 41 page FB EN VIN VCON SW VIN 2.5 V to 5.5V 0.4 V to 3.6 V 10 PF 4.7 PF PGND 0.5 PH LM3262 VOUT = 2.5 x VCON BPEN SGND DAC GPO1 Product Folder Sample & Buy Technical Documents Tools & Software Support & Community LM3262 SNVS875O – AUGUST 2012 – REVISED DECEMBER 2015 LM3262 6-MHz, 800-mA Miniature, Adjustable, Step-Down DC-DC Converter With Auto Bypass for RF Power Amplifiers 1 Features 3 Description The LM3262 is a DC-DC converter optimized for 1 • Operates from a Single Li-Ion Cell (2.5 V to 5.5 V) powering RF power amplifiers (PAs) from a single • 6-MHz (Typical) PWM Switching Frequency lithium-ion cell; however, it may be used in many • Adjustable Output Voltage (0.4 V to 3.6 V) other applications such as USB-powered portable applications. The device 2.5-V to 5.5-V input voltage • 800-mA Maximum Load Capability (up to 1 A in can be stepped down to an adjustable output voltage Bypass Mode) range from 0.4 V to 3.6 V. Output voltage is set using • High Efficiency (93% Typical at 3.8 VIN, 3.4 VOUT a VCON analog input which enables improved RF- at 500 mA) stage PA efficiencies. • Automatic ECO/PWM/BP Mode Change The LM3262 offers five modes of operation. In pulse • Current and Thermal Overload Protection width modulation (PWM) mode the device operates at • Multi-Function VCON Pin a fixed frequency of 6 MHz (typical), which minimizes RF interference at medium-to-low loads. At light load, (Eliminates Need for Separate BPEN Control) the device enters into ECO mode automatically and • Soft-Start Function operates with reduced switching frequency. In ECO • Small Chip Inductor in 0805 (2012) Case Size mode, the quiescent current is reduced and extends • 25-µA (Typical) IQ in Sleep Mode the battery life. Shutdown mode turns the device off and reduces battery consumption to 0.1 µA (typical). • 5-µs (Typical) Rise Time and Fall Time for At low-battery condition, bypass mode reduces the 2-V Step voltage dropout to less than 50 mV (typical). The • 9-Pin DSBGA Package device also features a sleep mode. The LM3262 is available in a 9-pin, lead-free DSBGA 2 Applications package. A high-switching frequency (6 MHz) allows • HSUPA, LTE Cellular Phones use of only three tiny surface-mount components: one inductor and two ceramic capacitors. • TD-SCDMA and TD-LTE • Hand-Held Radios Device Information(1) • RF PC Cards PART NUMBER PACKAGE BODY SIZE (MAX) • Battery-Powered RF Devices LM3262 DSGBA (9) 1.51 mm × 1.385 mm • USB-Powered Portable Applications (1) For all available packages, see the orderable addendum at the end of the data sheet. Typical Application Circuit 1 An IMPORTANT NOTICE at the end of this data sheet addresses availability, warranty, changes, use in safety-critical applications, intellectual property matters and other important disclaimers. PRODUCTION DATA. |
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