MAX8719ETA+T Maxim Integrated Products, MAX8719ETA+T Datasheet

IC REG LINEAR LP HV 8-TDFN

MAX8719ETA+T

Manufacturer Part Number
MAX8719ETA+T
Description
IC REG LINEAR LP HV 8-TDFN
Manufacturer
Maxim Integrated Products
Datasheet

Specifications of MAX8719ETA+T

Applications
Converter, Notebook Computer
Voltage - Input
4 ~ 28 V
Number Of Outputs
1
Voltage - Output
1.24 ~ 28 V
Operating Temperature
0°C ~ 85°C
Mounting Type
Surface Mount
Package / Case
8-TDFN Exposed Pad
Polarity
Positive
Input Voltage Max
28 V
Output Voltage
1.24 V to 28 V
Output Type
Adjustable
Dropout Voltage (max)
0.56 V at 100 mA
Output Current
100 mA
Voltage Regulation Accuracy
2%
Maximum Power Dissipation
1.951 W
Maximum Operating Temperature
+ 85 C
Mounting Style
SMD/SMT
Minimum Operating Temperature
- 40 C
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
The MAX8718/MAX8719 are micropower, 8-pin TDFN
linear regulators that supply always-on, keep-alive
power to CMOS RAM, real-time clocks (RTC), and
microcontrollers in systems with high-voltage batteries.
The circuits consist of a 100mA linear regulator and a
power-good comparator (PGOOD) with fixed-output
delay. Key features include wide input voltage range,
low-dropout voltage, and low-quiescent supply current.
Despite a miserly 25µA (max) no-load quiescent cur-
rent, the MAX8718/MAX8719 have good line- and load-
transient response and excellent AC power-supply
rejection. They provide a clean fixed 5V or 3.3V output
(MAX8718), or an adjustable 1.24V to 28V output
(MAX8719), even when subjected to fast supply-volt-
age changes that occur during the switchover from bat-
tery to AC-adapter input power. The space-saving
TDFN package has excellent thermal characteristics
and tolerates up to 1951mW of power dissipation.
Internal foldback current limiting and thermal shutdown
protect the regulator from overload and thermal faults.
In addition to the main notebook-computer application,
these devices are useful in other low-power, high-volt-
age applications (4V < V
ies, current control loops, telecom emergency power,
and housekeeping power for off-line supplies.
The MAX8718/MAX8719 are available in a thermally
enhanced 3mm x 3mm, 8-lead TDFN package.
19-3495; Rev 0; 11/04
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.
High-Voltage, Low-Power Linear Regulators for
CMOS/RTC Backup Power
Microcontroller Power
Notebook Computers
Smart-Battery Packs
PDAs and Handy-Terminals
Battery-Powered Systems
________________________________________________________________ Maxim Integrated Products
General Description
IN
< 28V) such as smart batter-
Applications
♦ 4V to 28V Input Range
♦ 18µA Quiescent Supply Current
♦ <3µA Shutdown Supply Current
♦ 100mA Output Current
♦ 3.3V or 5V, Pin-Selectable Output (MAX8718)
♦ Adjustable 1.24V to 28V Output (MAX8719)
♦ ±2% Output Accuracy
♦ Thermal-Overload Protection
♦ Delayed Power-Good Output
♦ Thermally Enhanced 8-Pin TDFN Package
MAX8718ETA -40°C to +85°C
MAX8719ETA -40°C to +85°C
Notebook Computers
PART
TOP VIEW
() ARE FOR THE MAX8719.
5/3 (FB)
TEMP RANGE PIN-PACKAGE
GND
V
CC
IN
1
2
4
3
Ordering Information
3mm × 3mm
MAX8718
MAX8719
TDFN
Pin Configuration
8 TDFN 3mm x
3mm
8 TDFN 3mm x
3mm
6
8
7
5
OUT
I.C.
SHDN
PGOOD
Features
VOLTAGE
Adjustable
OUTPUT
3.3V/5V
1

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MAX8719ETA+T Summary of contents

Page 1

... Microcontroller Power Notebook Computers Smart-Battery Packs PDAs and Handy-Terminals Battery-Powered Systems ________________________________________________________________ Maxim Integrated Products 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. Notebook Computers ♦ 28V Input Range ♦ 18µA Quiescent Supply Current ♦ ...

Page 2

High-Voltage, Low-Power Linear Regulators for Notebook Computers ABSOLUTE MAXIMUM RATINGS IN to GND ...............................................................-0.3V to +30V SHDN to GND ..............................................-0. 5/3 (MAX8718) to GND.............................................-0.3V to +6V FB (MAX8719) to GND .............................................-0.3V to +6V OUT (MAX8718) to GND ..........................................-0.3V ...

Page 3

High-Voltage, Low-Power Linear Regulators for ELECTRICAL CHARACTERISTICS (continued) (Circuit of Figure 15V 5µ OUT PARAMETER SYMBOL Output Current Limit Output Reverse Leakage Current Capacitive Load Requirements Startup Time Response Startup Output Overshoot V ...

Page 4

High-Voltage, Low-Power Linear Regulators for Notebook Computers ELECTRICAL CHARACTERISTICS (Circuit of Figure 15V 5µ OUT PARAMETER SYMBOL Input Voltage Range Supply Current (MAX8718) Supply Current (MAX8719) OUT Minimum Load Current Shutdown Supply Current ...

Page 5

High-Voltage, Low-Power Linear Regulators for (Circuit of Figure 15V 3.3V OUT SAFE LOAD-CURRENT OPERATING AREA vs. SUPPLY VOLTAGE 120.0 100.0 80.0 60.0 POWER-DISSIPATION LIMIT REGION 40.0 20 ...

Page 6

High-Voltage, Low-Power Linear Regulators for Notebook Computers (Circuit of Figure 15V 3.3V OUT TIME TO EXIT SHUTDOWN V = 15V IN DROPOUT VOLTAGE vs. LOAD CURRENT 350 300 250 200 150 100 50 ...

Page 7

High-Voltage, Low-Power Linear Regulators for PIN NAME MAX8718 MAX8719 GND 3 — 5/3 — PGOOD SHDN I. OUT IN OUT 6V ...

Page 8

High-Voltage, Low-Power Linear Regulators for Notebook Computers BIAS SHDN THERMAL SHUTDOWN FB (MAX8719) 5/3 (MAX8718 Figure 3. MAX8718/MAX8719 Functional Diagram Output current is limited to 210mA (typ). The current limit exceeds the 100mA (min) safe operating limit. The ...

Page 9

High-Voltage, Low-Power Linear Regulators for GND MAX8718 MAX8719 Figure 4. Layout of High-Current Paths Ratings). The thermal resistance junction-to-case of the TDFN package is 41°C/W, and the maximum safe junc- tion ...

Page 10

... 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. 10 ____________________Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600 © 2004 Maxim Integrated Products D ...

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