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TPS799-Q1 Datasheet(PDF) 13 Page - Texas Instruments

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Part No. TPS799-Q1
Description  200 mA, Low Quiescent Current, Ultralow Noise, High PSRR, Low Dropout, Linear Regulators
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Manufacturer  TI1 [Texas Instruments]
Direct Link  http://www.ti.com
Logo TI1 - Texas Instruments

TPS799-Q1 Datasheet(HTML) 13 Page - Texas Instruments

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Frequency (Hz)
IOUT = 1 mA
IOUT = 100 mA
IOUT = 250 mA
COUT = 2.2 µF
CNR = 0.01 µF
G001
TPS799-Q1
www.ti.com
SBVS097F – MARCH 2008 – REVISED JUNE 2015
Typical Application (continued)
8.2.2.5 Minimum Load
The TPS799xx-Q1 is stable and well behaved with no output load. To meet the specified accuracy, a minimum
load of 500
μA is required. Below 500 μA at junction temperatures near 125°C, the output can drift up enough to
cause the output pulldown to turn on. The output pulldown limits voltage drift to 5% typically, but ground current
could increase by approximately 50
μA. In typical applications, the junction cannot reach high temperatures at
light loads since there is no appreciable dissipated power. The specified ground current would then be valid at no
load in most applications.
8.2.3 Application Curve
Figure 14. Power-Supply Rejection Ratio vs Frequency
9 Power Supply Recommendations
These devices are designed to operate from an input voltage supply range between 2.7 V and 6.5 V. The input
voltage range provides adequate headroom in order for the device to have a regulated output. This input supply
is well-regulated and stable. If the input supply is noisy, additional input capacitors with low ESR can help
improve the output noise performance.
10 Layout
10.1 Layout Guidelines
10.1.1 Board Layout Recommendations to Improve PSRR and Noise Performance
To improve AC performance such as PSRR, output noise, and transient response, TI recommends designing the
board with separate ground planes for VIN and VOUT, with each ground plane connected only at the GND pin of
the device. In addition, the ground connection for the bypass capacitor should connect directly to the GND pin of
the device.
Copyright © 2008–2015, Texas Instruments Incorporated
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