EVAL-ADP7159 Datasheet, PDF (3/9 Pages) Analog Devices – Power supply rejection ratio

EVAL-ADP7159 User Guide
EVALUATION BOARD HARDWARE
EVALUATION BOARD CONFIGURATIONS
The ADP7159 evaluation boardscome supplied witheitherthe
ADP7159ACPZ-04-R7 or ADP7159ARDZ-04-R7 linearregulator,
depending on the version ordered. The schematics of these
evaluation boardconfigurations are shown in Figure 3 and
Figure 4, and the componentsinstalled in the board are shown
in Table 1.
The ADP7159 is available in four models that optimize power
dissipation and PSRR performance as a function of input and
output voltage. See Table 2 for selection guides.
Resistors R1 and R2 set the output voltage. The output voltage
(VOUT) is determined by
VOUT = 1.2 V × (1 + R1/R2)
UG-811
Table 1. ADP7159CP-04-EVALZ andADP7159RD-04-
EVALZ Hardware Components
Component Description
U1
ADP7159ACPZ-04-R7 or ADP7159ARDZ-04-R7
C1
Input bypass capacitor (CIN)
C2
VREG bypass capacitor (CREG)
C3
VREF bypass capacitor (CREF)
C4
C5
C6, C7
Bypass capacitor (CBYP)
Output capacitor (COUT)
Optional output capacitors (not installed in the
evaluation board)
R1, R2
Output resistor divider (sets the output voltage)
JP1
Jumper (connects the ENpin to theVIN pin for
automatic startup)
Table 2. Model Selection Guide for Input Voltage
Model
ADP7159-01
Adjustable VOUT Range (V)
1.2 to 1.8
ADP7159-02
1.2 to 2.3
ADP7159-03
1.2 to 2.9
ADP7159-04
1.2 to 3.3
VOUT Range (V) for Optimized PSRR
1.2 to 1.8
1.8 to 2.3
2.3 to 2.9
2.9 to 3.3
VREG (V)
2.1
2.6
3.2
3.6
VIN Range (V)
2.3 to 5.5
2.8 to 5.5
3.4 to 5.5
3.8 to 5.5
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