MAX8506ETE+T Maxim Integrated Products, MAX8506ETE+T Datasheet

IC DC-DC CONV PWM 16-TQFN

MAX8506ETE+T

Manufacturer Part Number
MAX8506ETE+T
Description
IC DC-DC CONV PWM 16-TQFN
Manufacturer
Maxim Integrated Products
Datasheet

Specifications of MAX8506ETE+T

Applications
Converter, WCDMA
Voltage - Input
2.6 ~ 5.5 V
Number Of Outputs
1
Voltage - Output
0.4 ~ 3.4 V
Operating Temperature
-40°C ~ 85°C
Mounting Type
Surface Mount
Package / Case
16-TQFN Exposed Pad
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
The MAX8506/MAX8507/MAX8508 integrate a PWM step-
down DC-DC regulator and a 75mΩ (typ) bypass FET to
power the PA in WCDMA and cdmaOne™ cell phones.
The supply voltage range is from 2.6V to 5.5V, and the
guaranteed output current is 600mA. One megahertz
PWM switching allows for small external components.
The MAX8506 and MAX8507 are dynamically controlled
to provide varying output voltages from 0.4V to 3.4V. The
MAX8508 is externally programmed for fixed 0.75V to
3.4V output. Digital logic enables a high-power (HP)
bypass mode that connects the output directly to the bat-
tery for all versions. The MAX8506/MAX8507/MAX8508
are designed so the output settles in less than 30µs for a
full-scale change in output voltage and load current.
The MAX8506/MAX8507/MAX8508 are offered in 16-pin
4mm x 4mm thin QFN packages (0.8mm max height).
19-2918; Rev 1; 1/04
cdmaOne is a trademark of CDMA Development Group.
Typical Application Circuits continued at end of data sheet.
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.
Bypass FET for WCDMA and cdmaOne Handsets
PWM Step-Down DC-DC Converters with 75m Ω Ω
WCDMA/NCDMA Cell Phones
Wireless PDAs, Palmtops, and Notebook
Computers
Wireless Modems
2.6V TO 5.5V
INPUT
0.22µF
2.2µF
________________________________________________________________ Maxim Integrated Products
General Description
SKIP
SHDN
REF
HP
1MHz
MAX8506
MAX8507
OSC
Applications
REF
Typical Application Circuits (MAX8506/MAX8507)
COMP
R
C
C
C
*
*
PWM
BATTP
C
PGND
0.4Ω
0.3Ω
f
*
LX
MAX8506
MAX8507
♦ Integrated 75mΩ (typ) Bypass FET
♦ 38mV Dropout at 600mA Load
♦ Up to 94% Efficiency
♦ Dynamically Adjustable Output from 0.4V to 3.4V
♦ Externally Fixed Output from 0.75V to 3.4V
♦ 1MHz Fixed-Frequency PWM Switching
♦ 600mA Guaranteed Output Current
♦ Shutdown Mode 0.1µA (typ)
♦ 16-Pin Thin QFN (4mm x 4mm, 0.8mm max Height)
Pin Configurations appear at end of data sheet.
MAX8506ETE
MAX8507ETE
MAX8508ETE
(MAX8506, MAX8507)
(MAX8508)
*
BATT
R
CURRENT-
CONTROL
C
PART
10
15
(kΩ)
LIMIT
4.7µH
0.075Ω
C
1500
1000
C
(pF)
C
f
100
100
GND
(pF)
OUT
-40°C to +85°C
-40°C to +85°C
-40°C to +85°C
TEMP RANGE
Ordering Information
REFIN
0.4V TO 3.4V OR V
OUTPUT
DAC
4.7µF
BATT
PIN-PACKAGE
16 Thin QFN
16 Thin QFN
16 Thin QFN
Features
1

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MAX8506ETE+T Summary of contents

Page 1

... REF 0.22µF HP Typical Application Circuits continued at end of data sheet. ________________________________________________________________ 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. ♦ Integrated 75mΩ (typ) Bypass FET ♦ 38mV Dropout at 600mA Load ♦ ...

Page 2

PWM Step-Down DC-DC Converters with 75m Ω Ω Bypass FET for WCDMA and cdmaOne Handsets ABSOLUTE MAXIMUM RATINGS SHDN, SKIP, HP, REFIN, BATTP, BATT, OUT GND ...........................................................-0.3V to +6V PGND to GND .......................................................-0.3V to +0.3V BATT to BATTP......................................................-0.3V ...

Page 3

PWM Step-Down DC-DC Converters with 75m Ω Ω Bypass FET for WCDMA and cdmaOne Handsets ELECTRICAL CHARACTERISTICS (continued) = 3.6V, SHDN = SKIP = BATT GND BATT BATTP C = 0.22µ -40°C ...

Page 4

PWM Step-Down DC-DC Converters with 75m Ω Ω Bypass FET for WCDMA and cdmaOne Handsets = 3.6V, SHDN = SKIP = BATT GND BATT BATTP EFFICIENCY vs. OUTPUT VOLTAGE IN NORMAL MODE 100 R ...

Page 5

PWM Step-Down DC-DC Converters with 75m Ω Ω Bypass FET for WCDMA and cdmaOne Handsets = 3.6V, SHDN = SKIP = BATT GND BATT BATTP LIGHT-LOAD SWITCHING WAVEFORM IN PWM MODE V = 0.4V ...

Page 6

PWM Step-Down DC-DC Converters with 75m Ω Ω Bypass FET for WCDMA and cdmaOne Handsets PIN NAME MAX8506 MAX8508 MAX8507 SHDN GND 3 3 REF 4 — REFIN 5 5 COMP ...

Page 7

PWM Step-Down DC-DC Converters with 75m Ω Ω Bypass FET for WCDMA and cdmaOne Handsets The MAX8506/MAX8507/MAX8508 use a fixed-frequen- cy, current-mode and PWM controller capable of achiev- ing 100% duty cycle. Current-mode feedback provides cycle-by-cycle current limiting and superior ...

Page 8

PWM Step-Down DC-DC Converters with 75m Ω Ω Bypass FET for WCDMA and cdmaOne Handsets Synchronous Rectification An N-channel synchronous rectifier operates during the second half of each switching cycle (off-time). When the inductor current falls below the N-channel current- ...

Page 9

PWM Step-Down DC-DC Converters with 75m Ω Ω Bypass FET for WCDMA and cdmaOne Handsets Table 1. Suggested Inductors PART SUPPLIER NUMBER Murata LQH32C-53 Sumida CDRH2D11 Taiyo Yuden LBLQ2016 TOKO D312C capacitor ripple. This sets the device speed for transient ...

Page 10

PWM Step-Down DC-DC Converters with 75m Ω Ω Bypass FET for WCDMA and cdmaOne Handsets Typical Application Circuits (MAX8508) (continued) INPUT 2.6V TO 5.5V 2.2µF SKIP SHDN REF 0.22µF 1MHz OSC HP TOP VIEW SHDN 1 GND 2 REF 3 ...

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

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