ADP1755ACPZ-R7 Analog Devices Inc, ADP1755ACPZ-R7 Datasheet

IC ADJ LDO REG 0.75V TO 3V 1.2A LFCSP-16

ADP1755ACPZ-R7

Manufacturer Part Number
ADP1755ACPZ-R7
Description
IC ADJ LDO REG 0.75V TO 3V 1.2A LFCSP-16
Manufacturer
Analog Devices Inc
Datasheet

Specifications of ADP1755ACPZ-R7

Primary Input Voltage
3.6V
Output Voltage Adjustable Range
0.75V To 3V
Dropout Voltage Vdo
200mV
No. Of Pins
16
Output Current
1.2A
Operating Temperature Range
-40°C To +125°C
Package / Case
16-LFCSP
Mounting Type
Surface Mount
Current - Output
1.2A (Max)
Voltage - Output
0.75 ~ 3 V
Voltage - Input
1.6 ~ 3.6 V
Operating Temperature
-40°C ~ 125°C
Regulator Topology
Positive Adjustable
Voltage - Dropout (typical)
0.105V @ 1.2A
Number Of Regulators
1
Current - Limit (min)
1.5A
Lead Free Status / RoHS Status
Lead free / RoHS Compliant

Available stocks

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Manufacturer
Quantity
Price
Part Number:
ADP1755ACPZ-R7
Manufacturer:
ATMEL
Quantity:
101
Part Number:
ADP1755ACPZ-R7
Manufacturer:
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Quantity:
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FEATURES
Maximum output current: 1.2 A
Input voltage range: 1.6 V to 3.6 V
Low shutdown current: <2 μA
Very low dropout voltage: 105 mV @ 1.2 A load
Initial accuracy: ±1%
Accuracy over line, load, and temperature: ±2%
7 fixed output voltage options with soft start
Adjustable output voltage option with soft start
High PSRR
23 μV rms at 0.75 V output
Stable with small 4.7 μF ceramic output capacitor
Excellent load and line transient response
Current-limit and thermal overload protection
Power-good indicator
Logic-controlled enable
Reverse current protection
APPLICATIONS
Server computers
Memory components
Telecommunications equipment
Network equipment
DSP/FPGA/microprocessor supplies
Instrumentation equipment/data acquisition systems
GENERAL DESCRIPTION
The ADP1754/ADP1755 are low dropout (LDO) CMOS linear
regulators that operate from 1.6 V to 3.6 V and provide up to
1.2 A of output current. These low V
regulation of nanometer FPGA geometries operating from 2.5 V
down to 1.8 V I/O rails, and for powering core voltages down to
0.75 V. Using an advanced proprietary architecture, the ADP1754/
ADP1755 provide high power supply rejection ratio (PSRR) and
low noise, and achieve excellent line and load transient response
with only a small 4.7 μF ceramic output capacitor.
The ADP1754 is available in seven fixed output voltage options.
The ADP1755 is the adjustable version, which allows output
Rev. B
Information furnished by Analog Devices is believed to be accurate and reliable. However, no
responsibility is assumed by Analog Devices for its use, nor for any infringements of patents or other
rights of third parties that may result from its use. Specifications subject to change without notice. No
license is granted by implication or otherwise under any patent or patent rights of Analog Devices.
Trademarks and registered trademarks are the property of their respective owners.
0.75 V to 2.5 V (ADP1754)
0.75 V to 3.0 V (ADP1755)
65 dB @ 1 kHz
65 dB @ 10 kHz
54 dB @ 100 kHz
IN
/V
OUT
LDOs are ideal for
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 781.329.4700
Fax: 781.461.3113
V
V
voltages that range from 0.75 V to 3.0 V via an external divider.
The ADP1754/ADP1755 allow an external soft start capacitor
to be connected to program the startup. A digital power-good
output allows power system monitors to check the health of the
output voltage.
The ADP1754/ADP1755 are available in a 16-lead, 4 mm × 4 mm
LFCSP, making them not only very compact solutions, but also
providing excellent thermal performance for applications that
require up to 1.2 A of output current in a small, low profile
footprint.
IN
IN
100kΩ
100kΩ
4.7µF
4.7µF
= 1.8V
= 1.8V
Figure 2. ADP1755 with Adjustable Output Voltage, 0.75 V to 3.0 V
1.2 A, Low V
Figure 1. ADP1754 with Fixed Output Voltage, 1.5 V
TYPICAL APPLICATION CIRCUITS
1
2
3
4
1
2
3
4
VIN
VIN
VIN
EN
©2008–2010 Analog Devices, Inc. All rights reserved.
VIN
VIN
VIN
EN
(Not to Scale)
ADP1754/ADP1755
ADP1755
TOP VIEW
(Not to Scale)
ADP1754
TOP VIEW
Linear Regulator
10nF
IN
VOUT
VOUT
VOUT
10nF
ADJ
, Low Dropout
SENSE
VOUT
VOUT
VOUT
12
11
10
9
12
11
10
9
V
OUT
www.analog.com
R1
R2
= 0.5V(1 + R1/R2)
4.7µF
V
OUT
4.7µF
= 1.5V

Related parts for ADP1755ACPZ-R7

ADP1755ACPZ-R7 Summary of contents

Page 1

FEATURES Maximum output current: 1.2 A Input voltage range: 1 3.6 V Low shutdown current: <2 μA Very low dropout voltage: 105 mV @ 1.2 A load Initial accuracy: ±1% Accuracy over line, load, and temperature: ±2% 7 ...

Page 2

ADP1754/ADP1755 TABLE OF CONTENTS Features .............................................................................................. 1 Applications ....................................................................................... 1 Typical Application Circuits ............................................................ 1 General Description ......................................................................... 1 Revision History ............................................................................... 2 Specifications ..................................................................................... 3 Input and Output Capacitor, Recommended Specifications .. 4 Absolute Maximum Ratings ............................................................ 5 Thermal ...

Page 3

SPECIFICATIONS 0 1.6 V (whichever is greater OUT Table 1. Parameter INPUT VOLTAGE RANGE 1 OPERATING SUPPLY CURRENT SHUTDOWN CURRENT OUTPUT VOLTAGE ACCURACY Fixed Output Voltage Accuracy (ADP1754) Adjustable Output Voltage Accuracy ...

Page 4

ADP1754/ADP1755 Parameter OUTPUT NOISE POWER SUPPLY REJECTION RATIO 1 Minimum output load current is 500 μA. 2 Accuracy when VOUT is connected directly to ADJ. When VOUT voltage is set by external feedback resistors, absolute accuracy in adjust mode depends ...

Page 5

ABSOLUTE MAXIMUM RATINGS Table 3. Parameter VIN to GND VOUT to GND EN to GND SS to GND PG to GND SENSE/ADJ to GND Storage Temperature Range Operating Junction Temperature Range Soldering Conditions Stresses above those listed under Absolute Maximum ...

Page 6

ADP1754/ADP1755 PIN CONFIGURATIONS AND FUNCTION DESCRIPTIONS PIN 1 INDICATOR VIN 1 VIN 2 ADP1754 VIN 3 TOP VIEW (Not to Scale NOTES CONNECT. 2. THE EXPOSED PAD ON THE BOTTOM OF THE LFCSP ENHANCES ...

Page 7

TYPICAL PERFORMANCE CHARACTERISTICS OUT OUT 1.520 1.515 1.510 1.505 1.500 1.495 1.490 1.485 1.480 –40 –5 25 JUNCTION TEMPERATURE (°C) Figure 5. Output Voltage vs. Junction ...

Page 8

ADP1754/ADP1755 100 –40 – TEMPERATURE (°C) Figure 11. Shutdown Current vs. Temperature at Various Input Voltages 0.14 0.12 0.10 0.08 0.06 0.04 1.6V 0. 100 ...

Page 9

3.5V INPUT VOLTAGE STEP, 2V/µs V OUT 2 5mV/DIV V OUT CH1 500mV CH2 5mV M10µs A CH4 9.60% Figure 17. Line Transient Response, Load Current = ...

Page 10

ADP1754/ADP1755 0 1.5V/1200mA 1.5V/10mA 2.5V/1200mA 2.5V/10mA –10 0.75V/1200mA 0.75V/10mA –20 –30 –40 –50 –60 –70 –80 –90 10 100 1k 10k FREQUENCY (Hz) Figure 23. Power Supply Rejection Ratio vs. Frequency and Output Voltage 100k 1M 10M Rev ...

Page 11

THEORY OF OPERATION The ADP1754/ADP1755 are low dropout linear regulators that use an advanced, proprietary architecture to provide high power supply rejection ratio (PSRR) and excellent line and load transient response with only a small 4.7 μF ceramic output capacitor. ...

Page 12

ADP1754/ADP1755 OUT 2 500mV/DIV B B CH1 2.0V CH2 500mV M40µ 9.8% Figure 27. V Ramp-Up with Internal Soft Start OUT ADJUSTABLE OUTPUT VOLTAGE (ADP1755) The output voltage of the ADP1755 can be ...

Page 13

1V/DIV 1 V OUT 500mV/DIV PG 1V/DIV OUT CH1 1.0V CH2 500mV M40.0µs A CH3 CH3 1.0V T 50.40% W Figure 30. Typical PG Behavior ...

Page 14

ADP1754/ADP1755 APPLICATIONS INFORMATION CAPACITOR SELECTION Output Capacitor The ADP1754/ADP1755 are designed for operation with small, space-saving ceramic capacitors, but they can function with most commonly used capacitors as long as care is taken with the effective series resistance (ESR) value. ...

Page 15

In this example, the worst-case temperature coefficient (TEMPCO) over −40°C to +85°C is assumed to be 15% for an X5R dielectric. The tolerance of the capacitor (TOL) is assumed to be 10%, and C = 4.46 μF at 1.8 V, ...

Page 16

ADP1754/ADP1755 140 MAX JUNCTION TEMPERATURE 120 LOAD = 1.2A 100 0.25 0.75 1.25 1.75 V – V (V) IN OUT 2 Figure 36. 6400 mm of PCB Copper, T 140 MAX JUNCTION TEMPERATURE 120 LOAD ...

Page 17

In cases where the board temperature is known, the thermal characterization parameter, Ψ , can be used to estimate the JB junction temperature rise. Maximum junction temperature (T is calculated from the board temperature (T dissipation (P ) using the ...

Page 18

ADP1754/ADP1755 PCB LAYOUT CONSIDERATIONS Heat dissipation from the package can be improved by increas- ing the amount of copper attached to the pins of the ADP1754/ ADP1755. However, as shown in Table 6, a point of diminishing returns is eventually ...

Page 19

... ADP1754ACPZ-1.2-R7 −40°C to +125°C ADP1754ACPZ-1.5-R7 −40°C to +125°C ADP1754ACPZ-1.8-R7 −40°C to +125°C ADP1754ACPZ-2.5-R7 −40°C to +125°C ADP1755ACPZ-R7 −40°C to +125°C ADP1755ACPZ −40°C to +125°C ADP1754-1.5-EVALZ ADP1754-BL1-EVZ ADP1755-EVALZ ADP1755-BL1-EVZ RoHS Compliant Part. ...

Page 20

ADP1754/ADP1755 NOTES ©2008–2010 Analog Devices, Inc. All rights reserved. Trademarks and registered trademarks are the property of their respective owners. D07722-0-2/10(B) Rev Page ...

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