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LTC6652AHMS8-2.048-PBF Datasheet(PDF) 9 Page - Linear Technology |
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LTC6652AHMS8-2.048-PBF Datasheet(HTML) 9 Page - Linear Technology |
9 / 16 page LTC6652 9 6652fb Bypass and Load Capacitors The LTC6652 voltage references do not require an input capacitor, but a 0.1μF capacitor located close to the part improves power supply rejection. The LTC6652 voltage references are stable with or without a capacitive load. For applications where an output capaci- tor is beneficial, a value of 0.1μF to 10μF is recommended depending on load conditions. The Typical Performance Characteristics section includes a plot illustrating a region of marginal stability. Either no or low value capacitors for any load current are acceptable. For loads that sink current or light loads that source current, a 0.1μF to 10μF capacitor has stable operation. For heavier loads that source current a 0.5μF to 10μF capacitor range is recommended. The transient response for a 0.5V step on VIN with and without an output capacitor is shown in Figures 2 and 3, respectively. The LTC6652 references with an output of 2.5V and above are guaranteed to source and sink 5mA. The 1.25V and 2.048V versions are guaranteed to source 5mA and sink 1mA. The test circuit for transient load step response is shown in Figure 1. Figures 4 and 5 show a 5mA source and sink load step response without a load capacitor, respectively. Start-Up The start-up characteristic of the LTC6652 is shown in Figures 8 and 9. Note that the turn-on time is affected by the value of the output capacitor. BLOCK DIAGRAM APPLICATIONS INFORMATION VIN SHDN GND VOUT 6652 BD BANDGAP 3 6 2 4 – + Figure 1. Transient Load Test Circuit VIN 3V 2, 3 6 100Ω 4, 5, 7, 8 CIN 0.1μF COUT 1μF VGEN 0.5V 6652 F01 LTC6652-2.5 |
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