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TPS76201DBVT Datasheet(PDF) 7 Page - Texas Instruments

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Part # TPS76201DBVT
Description  LOW OUTPUT ADJUSTABLE ULTRALOW-POWER 100-mA LDO LINEAR REGULATOR
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Manufacturer  TI [Texas Instruments]
Direct Link  http://www.ti.com
Logo TI - Texas Instruments

TPS76201DBVT Datasheet(HTML) 7 Page - Texas Instruments

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TPS76201
LOW OUTPUT ADJUSTABLE
ULTRALOW-POWER 100-mA LDO LINEAR REGULATOR
SLVS323A – FEBRUARY 2001 – REVISED MAY 2001
7
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
APPLICATION INFORMATION
The TPS76201 low-dropout (LDO) regulator has been optimized for use in battery-operated equipment
including, but not limited to, the sub 1.2-V DSP core voltage supplies. It features low quiescent current (23
µA
nominally) and enable inputs to reduce supply currents to 1
µA when the regulators are turned off.
A typical application circuit is shown in Figure 17.
VO
VI
OUT
FB
GND
EN
IN
TPS76201
1
µF
3
1
4
2
5
ESR = 0.5
4.7
µF
+
C1
Figure 17. Typical Application Circuit
external capacitor requirements
Although not required, a 0.047-
µF or larger ceramic input bypass capacitor, connected between IN and GND
and located close to the TPS76201, is recommended to improve transient response and noise rejection. A
higher-value electrolytic input capacitor may be necessary if large, fast-rise-time load transients are anticipated
and the device is located several inches from the power source.
Like all low dropout regulators, the TPS76201 requires an output capacitor connected between OUT and GND
to stabilize the internal control loop. The minimum recommended capacitance is 4.7
µF. The ESR (equivalent
series resistance) of the capacitor should be between 0.3
Ω and 1.5 Ω. to ensure stability. Capacitor values
larger than 4.7
µF are acceptable, and allow the use of smaller ESR values. Capacitances less than 4.7 µF are
not recommended because they require careful selection of ESR to ensure stability. Solid tantalum electrolytic,
aluminum electrolytic, and multilayer ceramic capacitors are all suitable, provided they meet the requirements
described above. Most of the commercially available 4.7
µF surface-mount solid tantalum capacitors, including
devices from Sprague, Kemet, and Nichico, meet the ESR requirements stated above. Multilayer ceramic
capacitors may have very small equivalent series resistances and may thus require the addition of a low value
series resistor to ensure stability.
CAPACITOR SELECTION
PART NO.
MFR.
VALUE
MAX ESR
SIZE (H
× L × W)
T494B475K016AS
KEMET
4.7
µF
1.5
1.9
× 3.5 × 2.8
195D106x0016x2T
SPRAGUE
10
µF
1.5
1.3
× 7.0 × 2.7
695D106x003562T
SPRAGUE
10
µF
1.3
2.5
× 7.6 × 2.5
TPSC475K035R0600
AVX
4.7
µF
0.6
2.6
× 6.0 × 3.2
† ESR is maximum resistance in Ohms at 100 kHz and TA = 25°C. Contact manufacturer for minimum ESR values.
‡ Size is in mm.


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