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LINEAR REGULATOR. AP7173 Datasheet

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LINEAR REGULATOR. AP7173 Datasheet
















AP7173 REGULATOR. Datasheet pdf. Equivalent













Part

AP7173

Description

1.5A LOW DROPOUT LINEAR REGULATOR



Feature


AP7173 1.5A LOW DROPOUT LINEAR REGULATOR WITH PROGRAMMABLE SOFT-START Descript ion The AP7173 is a 1.5A low-dropout (L DO) linear regulator that features a us er-programmable soft-start, an enable i nput and a power-good output. The soft- start reduces inrush current of the loa d capacitors and minimizes stress on th e input power source during startup. Th e enable input and.
Manufacture

Diodes Incorporated

Datasheet
Download AP7173 Datasheet


Diodes Incorporated AP7173

AP7173; power-good output allow users to config ure power management solutions that can meet the sequencing requirements of FP GAs, DSPs, and other applications with different start-up and power-down requi rements. The AP7173 is stable with any type of output capacitor of 2.2µF or m ore. A precision reference and feedback control deliver 2% accuracy over load, line, and operatin.


Diodes Incorporated AP7173

g temperature ranges. The AP7173 is avai lable in both DFN3030-10 and SO-8EP pac kages. Features ● Low VIN and wide VI N range: 1.0V to 5.5V ● Bias voltage (VVCC) range: 2.7V to 5.5V ● Low VOUT range: 0.8V to 3.3V ● Low dropout: 1 65mV typical at 1.5A, VVCC = 5V ● 2% accuracy over line, load and temperatur e range ● Power-Good (PG) output for supply monitoring and for sequ.


Diodes Incorporated AP7173

encing of other supplies ● Programmabl e soft-start provides linear voltage st artup ● Bias supply permits low VIN o peration with good transient response Stable with any output capacitor ≥ 2.2µF ● DFN3030-10 and SO-8EP: avai lable in “Green” molding compound ( No Br, Sb) ● Lead-free finish/ RoHS C ompliant (Note 1) Pin Assignments ( T op View ) IN 1 IN 2 PG 3 VCC 4 EN .





Part

AP7173

Description

1.5A LOW DROPOUT LINEAR REGULATOR



Feature


AP7173 1.5A LOW DROPOUT LINEAR REGULATOR WITH PROGRAMMABLE SOFT-START Descript ion The AP7173 is a 1.5A low-dropout (L DO) linear regulator that features a us er-programmable soft-start, an enable i nput and a power-good output. The soft- start reduces inrush current of the loa d capacitors and minimizes stress on th e input power source during startup. Th e enable input and.
Manufacture

Diodes Incorporated

Datasheet
Download AP7173 Datasheet




 AP7173
AP7173
1.5A LOW DROPOUT LINEAR REGULATOR WITH
PROGRAMMABLE SOFT-START
Description
The AP7173 is a 1.5A low-dropout (LDO) linear regulator that
features a user-programmable soft-start, an enable input and
a power-good output.
The soft-start reduces inrush current of the load capacitors
and minimizes stress on the input power source during start-
up. The enable input and power-good output allow users to
configure power management solutions that can meet the
sequencing requirements of FPGAs, DSPs, and other
applications with different start-up and power-down
requirements.
The AP7173 is stable with any type of output capacitor of
2.2µF or more. A precision reference and feedback control
deliver 2% accuracy over load, line, and operating
temperature ranges. The AP7173 is available in both
DFN3030-10 and SO-8EP packages.
Features
Low VIN and wide VIN range: 1.0V to 5.5V
Bias voltage (VVCC) range: 2.7V to 5.5V
Low VOUT range: 0.8V to 3.3V
Low dropout: 165mV typical at 1.5A, VVCC = 5V
2% accuracy over line, load and temperature range
Power-Good (PG) output for supply monitoring and for
sequencing of other supplies
Programmable soft-start provides linear voltage startup
Bias supply permits low VIN operation with good transient
response
Stable with any output capacitor 2.2µF
DFN3030-10 and SO-8EP: available in “Green” molding
compound (No Br, Sb)
Lead-free finish/ RoHS Compliant (Note 1)
Pin Assignments
( Top View )
IN 1
IN 2
PG 3
VCC 4
EN 5
10 OUT
9 OUT
8 FB
7 SS
6 GND
DFN3030-10
(Top View)
IN 1
PG 2
8 OUT
7 FB
VCC
3
6 SS
EN 4
5 GND
Applications
SO-8EP
PCs, Servers, Modems, and Set-Top-Boxes
FPGA Applications
DSP Core and I/O Voltages
Post-Regulation Applications
Applications With Sequencing Requirements
Note:
1. EU Directive 2002/95/EC (RoHS). All applicable RoHS exemptions applied. Please visit our website at
http://www.diodes.com/products/lead_free.html.
Typical Application Circuit
VIN
VVCC C1
C3
R3
IN OUT
PG
AP7173
VCC
FB
SS
EN GND
VOUT
R1 C2
R2
CSS
Figure 1. Typical Application Circuit (Adjustable Output)
AP7173
Document number: DS31369 Rev. 9 - 2
1 of 15
www.diodes.com
April 2011
© Diodes Incorporated




 AP7173
AP7173
1.5A LOW DROPOUT LINEAR REGULATOR WITH
PROGRAMMABLE SOFT-START
Typical Application Circuit (Continued)
Table 1. Resistor Values for Programming the Output Voltage (Note 2)
R1 (k)
Short
R2 (k)
Open
VOUT (V)
0.8
0.619
4.99
0.9
1.13 4.53
1
1.37 4.42 1.05
1.87 4.99
1.1
2.49 4.99
1.2
4.12 4.75
1.5
3.57 2.87
1.8
3.57 1.69
2.5
3.57 1.15
3.3
Note: 2 VOUT = 0.8 x (1 + R1 / R2)
Table 2. Capacitor Values for Programming the Soft-Start Time (Note 3)
CSS
SOFT-START TIME
Open
0.1ms
270pF
0.5ms
560pF
1ms
2.7nF
5ms
5.6nF
10ms
0.01μF
18ms
Note: 3. tSS(s) = 0.8 x CSS(F) / (4.4 x 10–7)
Figure 2. Turn-On Response
AP7173
Document number: DS31369 Rev. 9 - 2
2 of 15
www.diodes.com
April 2011
© Diodes Incorporated




 AP7173
AP7173
1.5A LOW DROPOUT LINEAR REGULATOR WITH
PROGRAMMABLE SOFT-START
Pin Descriptions
Pin Name
IN
PG
VCC
EN
GND
SS
FB
OUT
Thermal Pad
PIN #
SO-8EP
DFN3030-10
1 1, 2
23
34
45
56
67
78
8 9, 10
——
Description
Power Input pin.
Power-Good pin, open-drain output. When the VOUT is below the
PG threshold the PG pin is driven low; when the VOUT exceeds the
threshold, the PG pin goes into a high-impedance state. To use the PG
pin, use a 10kΩ to 1Mpull-up resistor to pull it up to a supply of up to
5.5V, which can be higher than the input voltage.
Bias Input pin, provides input voltage for internal control circuitry. This
voltage should be higher than the VIN.
Enable pin. This pin should be driven either high or low and must not
be floating. Driving this pin high enables the regulator, while pulling it
low puts the regulator into shutdown mode.
Ground.
Soft-Start pin. Connect a capacitor between this pin and the ground to
set the soft-start ramp time of the output voltage. If no capacitor is
connected, the soft-start time is typically 100µS.
Feedback pin. Connect this pin to an external voltage divider to set the
output voltage.
Regulated Output pin.
Solder this pad to large ground plane for increased thermal
performance.
Functional Block Diagram
IN
EN
VCC
PG
Gate
Driver
Current Limit and
Thermal Shutdown
+ 0.8V
-
-
+ 0.72V
OUT
SS
FB
GND
AP7173
Document number: DS31369 Rev. 9 - 2
3 of 15
www.diodes.com
April 2011
© Diodes Incorporated




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