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ILC6360 Datasheet(PDF) 8 Page - Impala Linear Corporation |
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ILC6360 Datasheet(HTML) 8 Page - Impala Linear Corporation |
8 / 14 page Step-Up/Step-Down DC-DC Converter for 1-Cell Lithium-Ion Batteries Impala Linear Corporation 8 (408) 574-3939 www.impalalinear.com Jan 1999 ILC6360 1.1 Power Good Output (POK) The power good output of the ILC6360 indicates when VOUT is within the regulation tolerance of the set output voltage. POK output is an open drain device capable of sinking 2mA. It will remain pulled low until the output voltage has risen to typically 95% of the specified VOUT. Adjustable Output Voltage Selection The ILC6360-ADJ allows the output voltage to be set using a potential divider. The formula for setting the adjustable output voltage is: VOUT = VFB x (1+R1/R2) Where VFB is the feedback voltage which is 1.25V nominal. Inductors The ILC6360 is designed to work with a 15µH inductor in most applications. There are several vendors who supply standard surface mount inductors for this value. Suggested inductor manufacturers are shown in table 1. Higher values of inductance will improve efficiency, but will reduce peak inductor current and consequently ripple and noise, but will also limit output current. Input Capacitor The input capacitor is necessary to minimize the peak cur- rent drawn from the battery. Typically a 100µF tantalum capacitor is recommended. Low equivalent series resistance (ESR) capacitors will help to minimize battery voltage ripple. Output Capacitor Low ESR capacitors should be used at the output of the ILC6360 to minimize output ripple. The high switching speeds and fast changes in the output capacitor current, mean that the equivalent series resistance of the capacitor can contribute greatly to the output ripple. In order to mini- mize these effects choose an output capacitor with less than 10nH of equivalent series inductance (ESL) and less than 100m Ω of equivalent series resistance (ESR). Typically these characteristics are met with ceramic capac- itors, but may also be met with certain types of tantalum capacitors. Suitable capacitor manufacturers are shown in table 2. A parallel combination of 10µF and 100µF is rec- ommended at the output ON/OFF R5 R6 LBI/SD 3 ILC6360 2 VIN 7 GND Fig 5: Shut Down Control 15 µH Ext Sync (Connect to GND if unused) L C OUT ILC6360CIR-ADJ L X V IN LBI/SD SYNC GND LBO V FB V OUT V OUT 1 2 3 4 8 7 6 5 + ON OFF V IN + 10 µF C IN + R1 R2 10µF 100µF Adjustable Voltage Configuration Vendor Part No. Contact Coilcraft DO330P-153 D03316P-153 D01608C-153 (847) 639-6400 www.coilcraft.com muRata LQH4N150K LQH3C150K (814) 237-1431 www.murata.com Sumida CDR74B-150MC CD43-150 CD54-150 (847) 956-0666 www.japanlink.com/sumida TDK NLC453232T-150K (847) 390-4373 www.tdk.co.jp Description Vendor Contact T495 series tantalum Kemet (864) 963-6300 595D series tantalum Sprague (603) 224-1961 TAJ, TPS series tantalum AVX (803) 946-0690 TDK (847) 390-4373 AVX (803) 946-0690 X7R Ceramic Taiyo Yuden (408) 573-4150 Table 1 Table 2 EXTERNAL COMPONENT SELECTION Capacitors |
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