MAX8582ETB+T Maxim Integrated Products, MAX8582ETB+T Datasheet

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MAX8582ETB+T

Manufacturer Part Number
MAX8582ETB+T
Description
DC/DC Switching Converters 2.5/1.5MHz Step-Down Converter
Manufacturer
Maxim Integrated Products
Datasheet

Specifications of MAX8582ETB+T

Lead Free Status / Rohs Status
Lead free / RoHS Compliant
The MAX8581/MAX8582 high-frequency step-down con-
verters are optimized for dynamically powering the power
amplifier (PA) in CDMA handsets. They integrate a high-
efficiency PWM step-down converter for medium- and
low-power transmission and a 60mΩ (typ) bypass mode
to power the PA directly from the battery during high-
power transmission. They use an analog input driven by
an external DAC to control the output voltage linearly for
continuous PA power adjustment. The MAX8581/
MAX8582 use an internal feedback network, and the
switching frequency is internally set to 2.5MHz and
1.5MHz, respectively.
Fast switching (up to 2.5MHz) and fast soft-start allow
the use of ceramic 2.2µF input and output capacitors
while maintaining low voltage ripple. The small 1.5µH to
3.3µH inductor size can be optimized for efficiency.
The MAX8581/MAX8582 are available in 10-pin, 3mm x
3mm TDFN packages (0.8mm max height).
19-0593; Rev 1; 1/07
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.
with 60mΩ Bypass in TDFN for CDMA PA Power
2.2µF
Li+ BATTERY
WCDMA/NCDMA Cell Phones
Wireless PDAs, Smartphones
CONTROL
INPUT
ANALOG
ON/OFF
Typical Operating Circuit
________________________________________________________________ Maxim Integrated Products
GND
IN
SHDN
REFIN
2.5MHz/1.5MHz Step-Down Converters
MAX8581
MAX8582
General Description
OUT
LX
HP
Applications
1.5µH OR 3.3µH
FORCED BYPASS
0.4V TO V
OUTPUT
BATT
2.2µF
♦ 600mA Step-Down Converter
♦ 60mΩ (typ) Bypass Mode with Integrated FET
♦ Dynamically Adjustable Output from 0.4V to V
♦ 2.5MHz and 1.5MHz Switching Frequency
♦ Small LC Components: 1.5µH to 3.3µH and 2.2µF
♦ Up to 94% Efficiency
♦ Low Output Ripple at All Loads
♦ 2.7V to 5.5V Input
♦ 0.1µA Shutdown Mode
♦ Output Short-Circuit Protection
♦ Thermal Shutdown
♦ 10-Pin, 3mm x 3mm TDFN Packages
*All devices are specified in the -40°C to +85°C extended
**EP = Exposed pad.
+Denotes a lead-free package.
temperature range.
MAX8581ETB+
MAX8582ETB+
PART*
TOP VIEW
+
10
1
10 TDFN-EP**
10 TDFN-EP**
PIN-
PACKAGE
Ordering Information
9
2
MAX8581/
MAX8582
8
3
Pin Configuration
7
4
6
5
MARK
ACU
TOP
ACT
Features
T1033-1
T1033-1
CODE
PKG
IN
1

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MAX8582ETB+T Summary of contents

Page 1

... ON/OFF ANALOG REFIN HP CONTROL ________________________________________________________________ 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. ♦ 600mA Step-Down Converter ♦ 60mΩ (typ) Bypass Mode with Integrated FET ♦ Dynamically Adjustable Output from 0. ♦ ...

Page 2

... REFIN Dual Mode Threshold LOGIC INPUTS V Logic Input Level V Logic Input Bias Current I IH Dual Mode is a trademark of Maxim Integrated Products, Inc. 2 _______________________________________________________________________________________ Continuous Power Dissipation (T 10-Pin TDFN (derate 24.4mW/ + 0.3V) IN Operating Temperature Range ...........................-40°C to +85°C Junction Temperature ......................................................+150°C RMS Storage Temperature Range .............................-65° ...

Page 3

Step-Down Converters with 60mΩ Bypass in TDFN for CDMA PA Power ELECTRICAL CHARACTERISTICS (continued 3.6V 0.9, V SHDN IN REFIN HP (Note 1) PARAMETER SYMBOL LX R On-Resistance R LX Leakage Current I ...

Page 4

Step-Down Converters with 60mΩ Bypass in TDFN for CDMA PA Power (V = 3.6V 1.2V, MAX8582 EV Kit OUT BYPASS MODE DROPOUT VOLTAGE vs. LOAD CURRENT 0.08 0.07 0.06 0. 3.2V OUT 0.04 ...

Page 5

Step-Down Converters with 60mΩ Bypass in TDFN for CDMA PA Power (V = 3.6V 1.2V, MAX8582 EV Kit OUT LIGHT-LOAD SWITCHING WAVEFORMS I LOAD OUT V LX 200ns/div SOFT-START WAVEFORMS MAX8581/2 toc11 ...

Page 6

Step-Down Converters with 60mΩ Bypass in TDFN for CDMA PA Power PIN NAME 1 GND Ground Supply Voltage Input. 2.7V to 5.5V. Bypass with a 2.2µF ceramic capacitor as close as possible and GND. ...

Page 7

Step-Down Converters with 60mΩ Bypass in TDFN for CDMA PA Power V = 3.2V TO 3.66V IN 200mV/div OUT 200mV/div 5ms/div Figure 1. V and V with Automatic Entry/Exit into Bypass IN OUT Mode Forced and ...

Page 8

Step-Down Converters with 60mΩ Bypass in TDFN for CDMA PA Power Table 1. Suggested Inductors MANUFACTURER SERIES Coilcraft LP03310 SD3110 Cooper SD3112 FDK MIPF2520D Panasonic ELC3FN CDRH2D09 Sumida CDRH2D11 CB2016 CBC2016 CB2518 Taiyo Yuden CBC2518 NR3010 MDT2520-CR TOKO D2812C ...

Page 9

Step-Down Converters with 60mΩ Bypass in TDFN for CDMA PA Power (The package drawing(s) in this data sheet may not reflect the most current specifications. For the latest package outline information go to www.maxim-ic.com/packages.) _______________________________________________________________________________________ Package Information PACKAGE OUTLINE, ...

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. Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600 ____________________ 10 © 2007 Maxim Integrated Products ...

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