MAX1935ETA15-T Maxim Integrated Products, MAX1935ETA15-T Datasheet

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MAX1935ETA15-T

Manufacturer Part Number
MAX1935ETA15-T
Description
Low Dropout (LDO) Regulators 500mA
Manufacturer
Maxim Integrated Products
Datasheet

Specifications of MAX1935ETA15-T

Number Of Outputs
1
Polarity
Positive
Input Voltage Max
5.5 V
Output Voltage
1.5 V
Output Type
Fixed
Output Current
500 mA
Line Regulation
0 % / V
Voltage Regulation Accuracy
2.50%
Maximum Power Dissipation
1.95 W
Maximum Operating Temperature
+ 85 C
Mounting Style
SMD/SMT
Package / Case
TDFN-8 EP
Minimum Operating Temperature
- 40 C
Reference Voltage
0.8 V
The MAX1935 low-dropout linear regulator operates
from a 2.25V to 5.5V supply and delivers a guaranteed
500mA load current with low 175mV dropout. The high-
accuracy (±1.5%) output voltage is preset at an inter-
nally trimmed voltage or can be adjusted from 0.8V to
4.5V with an external resistive-divider.
An internal PMOS pass transistor allows low 210µA
supply current, making this device ideal for portable
equipment such as personal digital assistants (PDAs),
cellular phones, cordless phones, and other equip-
ment, including base stations and docking stations.
Other features include an active-low, power-OK output
that indicates when the output is out of regulation, a
0.02µA shutdown mode, short-circuit protection, and
thermal-shutdown protection. The MAX1935 comes in a
tiny 1.9W, 8-pin 3mm x 3mm thin QFN package.
19-2599; Rev 0; 10/02
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.
2.25V TO 5.5V
ON
TO µC
Notebook Computers
Cellular and Cordless Telephones
PDAs
Palmtop Computers
Base Stations
USB Hubs
Docking Stations
100kΩ
OFF
R
V
POK
IN
1µF
C
IN
Typical Operating Circuit
________________________________________________________________ Maxim Integrated Products
POK
IN
SHDN
MAX1935
General Description
500mA, Low-Voltage Linear Regulator
OUT
GND
SET
Applications
C
10µF
OUT
0.8V TO 4.5V
V
R
R
OUT
2
1
o Guaranteed 500mA Output Current
o Output Down to 0.8V
o Low 175mV Dropout at 500mA
o ±1.5% Output Voltage Accuracy
o Power-OK Output
o Low 210µA Ground Current
o 0.02µA Shutdown Current
o Thermal-Overload Protection
o Output Current Limit
o Tiny 1.9W, 8-Pin 3mm x 3mm Thin QFN Package
*Contact factory for preset output voltages.
MAX1935ETA*
MAX1935ETA15*
MAX1935ETA
MAX1935ETA15
TOP VIEW
Preset at 1.5V
Adjustable from 0.8V to 4.5V
PART
PART
SHDN
POK
IN
IN
-40°C to +85°C
-40°C to +85°C
T EM P R A N G E
Ordering Information
3
4
1
2
Adjustable
VO L T A G E
O U T PU T
3mm x 3mm
1.5V
THIN QFN
Pin Configuration
in Tiny QFN
MAX1935
Selector Guide
8
7
6
5
PIN-PACKAGE
8 Thin QFN
3mm x 3mm
8 Thin QFN
3mm x 3mm
OUT
OUT
SET
GND
Features
TOP MARK
ADB
ADB
1

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MAX1935ETA15-T Summary of contents

Page 1

... Low 210µA Ground Current o 0.02µA Shutdown Current o Thermal-Overload Protection o Output Current Limit o Tiny 1.9W, 8-Pin 3mm x 3mm Thin QFN Package PART Applications MAX1935ETA* MAX1935ETA15* *Contact factory for preset output voltages. PART MAX1935ETA MAX1935ETA15 TOP VIEW V OUT 0.8V TO 4.5V C OUT 10µ ...

Page 2

... S HDN Input Threshold HDN Input Bias Current I SHDN Startup Time t START Dual Mode is a trademark of Maxim Integrated Products, Inc. 2 _______________________________________________________________________________________ Operating Temperature .......................................-40°C to +85°C Junction Temperature ......................................................+150°C + 0.3V) IN Storage Temperature Range .............................-65°C to +150°C Lead Temperature (soldering, 10s) .................................+300°C ...

Page 3

Low-Voltage Linear Regulator ELECTRICAL CHARACTERISTICS (continued 500mV OUT(SETPOINT) IN noted. Typical values are +25°C.) A PARAMETER SYMBOL POWER-OK POK Output Low Voltage V Operating Voltage Range for Valid POK ...

Page 4

Low-Voltage Linear Regulator in Tiny QFN ELECTRICAL CHARACTERISTICS (continued) = 2.25V whichever is greater, SET = GND, SHDN = IN 500mV OUT(SETPOINT) IN noted. Typical values are +25°C.) ...

Page 5

Low-Voltage Linear Regulator + 500mV, SHDN = IN 3.3V OUT IN OUT GROUND-PIN CURRENT vs. LOAD CURRENT 500 450 V = 5.5V IN 400 350 V = 3.8V IN 300 250 200 150 ...

Page 6

Low-Voltage Linear Regulator in Tiny QFN + 500mV, SHDN = IN 3.3V OUT IN OUT LOAD-TRANSIENT RESPONSE NEAR DROPOUT 10µs/div SHUTDOWN WAVEFORM R = 6.6Ω (500mA) OUT 20µs/div PIN NAME Regulator Input. Supply ...

Page 7

Low-Voltage Linear Regulator Detailed Description The MAX1935 is a low-dropout, low-quiescent-current linear regulator. The device supplies loads up to 500mA and is available with preset output voltages. As illustrated in Figure 1, the MAX1935 includes a 0.8V ref- erence, ...

Page 8

Low-Voltage Linear Regulator in Tiny QFN V IN 2.25V TO 5. 1µF ON SHDN OFF SHUTDOWN LOGIC LOGIC SUPPLY VOLTAGE (V ) OUT R POK 100kΩ MAX1935 POK TO µC Figure 1. Functional Diagram a ...

Page 9

Low-Voltage Linear Regulator IN OUT V IN +2.25V TO +5.5V IN OUT C IN MAX1935 1µF ON SHDN SET OFF POK GND Figure 2. Adjustable Output Using External Feedback Resistors response graphs (see the Typical Operating Characteristics) show two ...

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 © 2002 Maxim Integrated Products Printed USA is a registered trademark of Maxim Integrated Products ...

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