Datasheet

V = V + ( ANY-OUT Pins to Ground)
OUT REF
S
IN
EN
NR
0P1V
0P2V
OUT
SENSE
GND
0P4V 0P8V 1P6V 3P2V 6P4V1 6P4V2
47 Fm
1 Fm
10 Fm
Load
V = 3.3 V
OUT
V = 5 V
IN
TPS7A4700
TPS7A4701
TPS7A4700
TPS7A4701
SBVS204E –JUNE 2012–REVISED JANUARY 2014 www.ti.com
APPLICATION INFORMATION
TYPICAL APPLICATION CIRCUIT
Output voltage is set by grounding the appropriate control pins, as shown in Figure 23. When grounded, all
control pins add a specific voltage on top of the internal reference voltage (V
REF
= 1.4 V). For example, when
grounding pins 0P1V, 0P2V, and 1P6V, the voltage values 0.1 V, 0.2 V, and 1.6 V are added to the 1.4-V
internal reference voltage for V
OUT(NOM)
equal to 3.3 V, as described in Equation 1.
V
OUT(NOM)
= V
REF
+ 0.1 V + 0.2 V + 1.6 V = 1.4 V + 0.1 V + 0.2 V + 1.6 V = 3.3 V (1)
Figure 23. Maximize PSRR Performance and Minimize RMS Noise
ANY-OUT PROGRAMMABLE OUTPUT VOLTAGE
Both devices can be used in ANY-OUT mode. For ANY-OUT operation, the TPS7A4700 and TPS7A4701
(TPS7A470x) do not use external resistors to set the output voltage, as is typical of low-dropout regulators
(LDOs), but use device pins 4, 5, 6, 8, 9, 10, 11, and 12 to program the regulated output voltage. Each pin is
either connected to ground (active) or is left open (floating). The ANY-OUT programming is set by Equation 2 as
the sum of the internal reference voltage (V
REF
= 1.4 V) plus the accumulated sum of the respective voltages
assigned to each active pin; that is, 100 mV (pin 12), 200 mV (pin 11), 400 mV (pin 10), 800 mV (pin 9), 1.6 V
(pin 8), 3.2 V (pin 6), 6.4 V (pin 5), or 6.4 V (pin 4). Table 1 summarizes these voltage values associated with
each active pin setting for reference. By leaving all program pins open, or floating, the output is thereby
programmed to the minimum possible output voltage equal to V
REF
.
(2)
Table 1. ANY-OUT Programmable Output Voltage
ANY-OUT PROGRAM PINS (Active Low) ADDITIVE OUTPUT VOLTAGE LEVEL
Pin 4 (6P4V2) 6.4 V
Pin 5 (6P4V1) 6.4 V
Pin 6 (3P2) 3.2 V
Pin 8 (1P6) 1.6 V
Pin 9 (0P8) 800 mV
Pin 10 (0P4) 400 mV
Pin 11 (0P2) 200 mV
Pin 12 (0P1) 100 mV
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