MAX8556ETE Maxim Integrated Products, MAX8556ETE Datasheet

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MAX8556ETE

Manufacturer Part Number
MAX8556ETE
Description
Manufacturer
Maxim Integrated Products
Datasheet

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The MAX8556/MAX8557 low-dropout linear regulators
operate from input voltages as low as 1.425V and are
able to deliver up to 4A of continuous output current
with a typical dropout voltage of only 100mV. The out-
put voltage is adjustable from 0.5V to V
Designed with an internal p-channel MOSFET pass tran-
sistor, the MAX8556/MAX8557 maintain a low 800µA typi-
cal supply current, independent of the load current and
dropout voltage. Using a p-channel MOSFET eliminates
the need for an additional external supply or a noisy inter-
nal charge pump. Other features include a logic-con-
trolled shutdown mode, built-in soft-start, short-circuit
protection with foldback current limit, and thermal-over-
load protection. The MAX8556 features a POK output that
transitions high when the regulator output is within ±10%
of its nominal output voltage. The MAX8557 offers a
power-on reset output that transitions high 140ms after the
output has achieved 90% of its nominal output voltage.
The MAX8556/MAX8557 are available in a 16-pin thin
QFN 5mm x 5mm package with exposed paddle.
19-3257; Rev 0; 4/04
For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at
1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com.
1.425V TO 3.6V
Servers and Storage Devices
Networking
Base Stations
Optical Modules
Point-of-Load Supplies
ATE
V
IN
Typical Operating Circuit
________________________________________________________________ Maxim Integrated Products
General Description
IN
EN
POK
(POR)
(MAX8557)
MAX8556
N.C.
GND
OUT
Applications
FB
IN
0.5V TO V
- 0.2V.
V
OUT
IN
- 0.2V
4A Ultra-Low-Input-Voltage
♦ 1.425V to 3.6V Input Voltage Range
♦ Guaranteed 4A Output Current
♦ ±1% Output Accuracy Over Load/Line/
♦ 100mV Dropout at 4A Load (typ)
♦ Built-In Soft-Start
♦ 800µA (typ) Operating Supply Current
♦ 150µA (max) Shutdown Supply Current
♦ Short-Circuit Current Foldback Protection
♦ Thermal-Overload Protection
♦ ±10% Power-OK (MAX8556)
♦ 140ms Power-On Reset Output (MAX8557)
♦ Fast Transient Response
♦ 16-Pin Thin QFN 5mm x 5mm Package
MAX8556ETE
MAX8557ETE
Temperature
PART
TOP VIEW
IN
IN
IN
IN
-40°C to +85°C
-40°C to +85°C
TEMP RANGE
1
2
3
4
LDO Regulators
16
Ordering Information
5
5mm x 5mm
(MAX8557)
THIN QFN
MAX8556
15
6
Pin Configuration
14
7
16 Thin QFN
5mm X 5mm
16 Thin QFN
5mm X 5mm
13
PIN-
PACKAGE
8
12
11
10
9
POK (POR)
OUT
OUT
OUT
Features
FEATURE
POK
POR
1

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MAX8556ETE Summary of contents

Page 1

... Shutdown Supply Current ♦ Short-Circuit Current Foldback Protection ♦ Thermal-Overload Protection ♦ ±10% Power-OK (MAX8556) ♦ 140ms Power-On Reset Output (MAX8557) ♦ Fast Transient Response ♦ 16-Pin Thin QFN 5mm x 5mm Package Applications PART MAX8556ETE MAX8557ETE TOP VIEW V OUT 0. 0.2V IN OUT ...

Page 2

Ultra-Low-Input-Voltage LDO Regulators ABSOLUTE MAXIMUM RATINGS IN, EN, POK, POR to GND .......................................-0.3V to +4V FB, OUT to GND ..........................................-0. Output Short-Circuit Duration.....................................Continuous Continuous Power Dissipation (T = +70°C) A 16-Pin Thin QFN (derate 33.3mW/°C above +70°C) ...

Page 3

ELECTRICAL CHARACTERISTICS (continued 1.8V 1.5V 2mA OUT OUT PARAMETER POK Output Current, High POK Delay Time EN Enable Input Threshold Enable Input Bias Current THERMAL SHUTDOWN Thermal-Shutdown Threshold POR ...

Page 4

Ultra-Low-Input-Voltage LDO Regulators ( +1.8V +1.5V 4A OUT OUT GND CURRENT vs. TEMPERATURE 900 800 700 LOAD 600 500 400 LOAD 300 200 ...

Page 5

V = +1.8V +1.5V OUT OUT PSRR vs. FREQUENCY FREQUENCY (kHz) EXPOSED PADDLE TEMPERATURE vs. AMBIENT TEMPERATURE 100 ...

Page 6

Ultra-Low-Input-Voltage LDO Regulators PIN NAME 1–6 IN LDO Input. Connect to a 1.425V to 3.6V input voltage. Bypass with a 22µF ceramic capacitor to GND. LDO Output. Bypass with 2 x 10µF ceramic capacitors to GND. A smaller capacitance ...

Page 7

Detailed Description The MAX8556/MAX8557 low-dropout linear regulators are capable of delivering from low-input volt- age supplies ranging from 1.425V to 3.6V with only 200mV of dropout (max). The PMOS output stage can be driven from input voltages ...

Page 8

Ultra-Low-Input-Voltage LDO Regulators Applications Information Output Voltage Selection The MAX8556/MAX8557 feature an adjustable output voltage from 0.5V to 3.4V. Set the output voltage using an external resistor-divider from the output to GND with FB connected to the center tap ...

Page 9

Thermal Considerations in PC Board Layout How much power the package can dissipate strongly depends on the mounting method of the IC to the PC board and the copper area for cooling. Using the JEDEC test standard, the maximum power ...

Page 10

Ultra-Low-Input-Voltage LDO Regulators (The package drawing(s) in this data sheet may not reflect the most current specifications. For the latest package outline information www.maxim-ic.com/packages.) D D/2 PIN # 1 I. ______________________________________________________________________________________ 0.15 C ...

Page 11

... Maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim product. No circuit patent licenses are implied. Maxim reserves the right to change the circuitry and specifications without notice at any time. Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600 ____________________ 11 © 2004 Maxim Integrated Products ...

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