MAX1706EEE Maxim Integrated Products, MAX1706EEE Datasheet

IC CONV DCDC 1-3CELL HP 16-QSOP

MAX1706EEE

Manufacturer Part Number
MAX1706EEE
Description
IC CONV DCDC 1-3CELL HP 16-QSOP
Manufacturer
Maxim Integrated Products
Type
Step-Up (Boost)r
Datasheet

Specifications of MAX1706EEE

Internal Switch(s)
Yes
Synchronous Rectifier
No
Number Of Outputs
1
Voltage - Output
2.5 ~ 5.5 V
Current - Output
400mA
Frequency - Switching
300kHz
Voltage - Input
0.7 ~ 5.5 V
Operating Temperature
-40°C ~ 85°C
Mounting Type
Surface Mount
Package / Case
16-QSOP
Power - Output
696mW
Lead Free Status / RoHS Status
Contains lead / RoHS non-compliant

Available stocks

Company
Part Number
Manufacturer
Quantity
Price
Part Number:
MAX1706EEE
Manufacturer:
MAXIM/美信
Quantity:
20 000
Part Number:
MAX1706EEE+T
Manufacturer:
MAXIM/美信
Quantity:
20 000
Part Number:
MAX1706EEE-T
Manufacturer:
MAXIM/美信
Quantity:
20 000
The MAX1705/MAX1706 are high-efficiency, low-noise,
step-up DC-DC converters with an auxiliary linear-
regulator output. These devices are intended for use in
battery-powered wireless applications. They use a syn-
chronous rectifier pulse-width-modulation (PWM) boost
topology to generate 2.5V to 5.5V outputs from battery
inputs, such as 1 to 3 NiCd/NiMH cells or 1 Li-Ion cell.
The MAX1705 has an internal 1A n-channel MOSFET
switch. The MAX1706 has a 0.5A switch. Both devices
also have a built-in low-dropout linear regulator that
delivers up to 200mA.
With an internal synchronous rectifier, the MAX1705/
MAX1706 deliver 5% better efficiency than similar non-
synchronous converters. They also feature a pulse-
frequency-modulation (PFM) standby mode to improve
efficiency at light loads, and a 1µA shutdown mode. An
efficiency-enhancing track mode reduces the step-up
DC-DC converter output to 300mV above the linear-reg-
ulator output.
Both devices come in a 16-pin QSOP package, which
occupies the same space as an 8-pin SO. Other features
include two shutdown-control inputs for push-on/push-off
control, and an uncommitted comparator for use as a volt-
age monitor.
________________________Applications
19-1198; Rev 1; 8/00
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.
Step-Up DC-DC Converters with Linear Regulator
Digital Cordless Phones
Personal Communicators
Palmtop Computers
Handheld Instruments
TOP VIEW
TRACK
FBLDO
GND
OUT
LBN
LBP
REF
FB
________________________________________________________________ Maxim Integrated Products
1
2
6
3
4
5
7
8
General Description
MAX1705
MAX1706
QSOP
Pin Configuration
1- to 3-Cell, High-Current, Low-Noise,
PCS Phones
Wireless Handsets
Two-Way Pagers
16
15
14
13
12
11
10
9
POUT
ONA
ONB
LX
PGND
CLK/SEL
LBO
LDO
♦ Up to 96% Efficiency
♦ 1.1V
♦ Up to 850mA Output (MAX1705)
♦ Step-Up Output (2.5V to 5.5V Adjustable)
♦ Linear Regulator (1.25V to 5.0V Adjustable)
♦ PWM/PFM Synchronous-Rectified Topology
♦ 300kHz PWM Mode or Synchronizable
♦ 1µA Shutdown Mode
♦ Voltage Monitor
♦ Pushbutton On/Off Control
*Dice are tested at T
__________Typical Operating Circuit
EFFICIENCY
MAX1705C/D
MAX1705EEE
MAX1706C/D
MAX1706EEE
ON/OFF CONTROL
HIGH
INPUT 0.7V TO 5.5V
PART
LOW-BATTERY
DETECTION
IN
Guaranteed Startup
NOISE
LOW
A
-40°C to +85°C
-40°C to +85°C
= +25°C, DC parameters only.
TEMP RANGE
0°C to +70°C
0°C to +70°C
LBO
ONA
ONB
CLK/SEL
TRACK
LBP
LBN
REF
Ordering Information
MAX1705
MAX1706
GND
PGND
LX
FBLDO
POUT
OUT
LDO
FB
16 QSOP
16 QSOP
PIN-PACKAGE
Dice*
Dice*
Features
STEP-UP OUTPUT
LINEAR
REGULATOR
OUTPUT
1

Related parts for MAX1706EEE

MAX1706EEE Summary of contents

Page 1

... PWM/PFM Synchronous-Rectified Topology ♦ 300kHz PWM Mode or Synchronizable ♦ 1µA Shutdown Mode ♦ Voltage Monitor ♦ Pushbutton On/Off Control PART MAX1705C/D MAX1705EEE MAX1706C/D MAX1706EEE *Dice are tested at T __________Typical Operating Circuit PCS Phones Wireless Handsets INPUT 0.7V TO 5.5V Two-Way Pagers LOW-BATTERY DETECTION ...

Page 2

High-Current, Low-Noise, Step-Up DC-DC Converters with Linear Regulator ABSOLUTE MAXIMUM RATINGS ONA, ONB, FBLDO, OUT, POUT to GND...................-0. PGND to GND.....................................................................±0.3V POUT to OUT ......................................................................±0. PGND ............................................-0. CLK/SEL, REF, FB, TRACK, ...

Page 3

High-Current, Low-Noise, Step-Up DC-DC Converters with Linear Regulator ELECTRICAL CHARACTERISTICS (continued) = 3.6V, CLK/SEL = FB = LBN = LBO = ONA = ONB = TRACK = GND, REF = open (bypassed with 0.22µF ...

Page 4

High-Current, Low-Noise, Step-Up DC-DC Converters with Linear Regulator ELECTRICAL CHARACTERISTICS (continued) = 3.6V, CLK/SEL = FB = LBN = LBO = ONA = ONB = TRACK = GND, REF = open (bypassed with 0.22µF ...

Page 5

High-Current, Low-Noise, Step-Up DC-DC Converters with Linear Regulator ELECTRICAL CHARACTERISTICS (continued) = 3.6V, CLK/SEL = FB = LBN = LBO = ONA = ONB = TRACK = GND, REF = open (bypassed with 0.22µF ...

Page 6

High-Current, Low-Noise, Step-Up DC-DC Converters with Linear Regulator (Circuit of Figure +25°C, unless otherwise noted.) A MAX1705 EFFICIENCY vs. OUTPUT CURRENT (V = 3.3V) OUT 100 B.1 90 A.1 B ...

Page 7

High-Current, Low-Noise, Step-Up DC-DC Converters with Linear Regulator ____________________________Typical Operating Characteristics (continued) (Circuit of Figure +25°C, unless otherwise noted.) A LINEAR-REGULATOR POWER-SUPPLY REJECTION RATIO vs. FREQUENCY 100 ...

Page 8

High-Current, Low-Noise, Step-Up DC-DC Converters with Linear Regulator ____________________________Typical Operating Characteristics (continued) (Circuit of Figure +25°C, unless otherwise noted.) A MAX1705 LINE-TRANSIENT RESPONSE A B 200µs/div I = 0mA 3.3V OUT OUT ...

Page 9

High-Current, Low-Noise, Step-Up DC-DC Converters with Linear Regulator PIN NAME 1 LBP Low-Battery Comparator Noninverting Input. Common-mode range is 0.5V to 1.5V. 2 LBN Low-Battery Comparator Inverting Input. Common-mode range is 0.5V to 1.5V. 3 REF 1.250V ...

Page 10

High-Current, Low-Noise, Step-Up DC-DC Converters with Linear Regulator Detailed Description The MAX1705/MAX1706 are designed to supply both power and low-noise circuitry in portable RF and data- acquisition instruments. They combine a linear regula- tor, step-up switching regulator, ...

Page 11

High-Current, Low-Noise, Step-Up DC-DC Converters with Linear Regulator INPUT 0. 22µF (TO PGND 0.33µF (TO OUT) NOTE: HEAVY LINES INDICATE HIGH-CURRENT PATH. Figure 2. Typical Operating Circuit (PFM Mode) Step-Up Converter ...

Page 12

High-Current, Low-Noise, Step-Up DC-DC Converters with Linear Regulator IFB* IREF CURRENT- LIMIT LEVEL OSC *SEE FIGURE 1 Figure 3. Simplified PWM Controller Block Diagram current limit for the MAX1705, and 950mA (max) for the ...

Page 13

High-Current, Low-Noise, Step-Up DC-DC Converters with Linear Regulator regulation for the first time. However when power is first applied, LDO may be on before POUT reaches regula- tion. If this is not acceptable, the chip should be ...

Page 14

High-Current, Low-Noise, Step-Up DC-DC Converters with Linear Regulator LBP is less than 50nA, R6 can be a large value (such as 270kΩ or less) without sacrificing accuracy. Connect the resistor voltage-divider as close to the IC as ...

Page 15

High-Current, Low-Noise, Step-Up DC-DC Converters with Linear Regulator less) without sacrificing accuracy. Connect the resistor voltage-divider as close to the IC as possible, within 0.2in. (5mm) of the FB pin. Alternatively, set the step-up converter output to ...

Page 16

High-Current, Low-Noise, Step-Up DC-DC Converters with Linear Regulator reduces peak currents drawn from the input source and reduces input switching noise. The input voltage source impedance determines the size required for the input capacitor. When operating directly ...

Page 17

High-Current, Low-Noise, Step-Up DC-DC Converters with Linear Regulator LX POUT CONTROL MAX1705 INPUTS MAX1706 GND LDO µ C I/O Figure 10. Typical Phone Application Table 5. Typical Available Output Current NO. OF CELLS 1 NiCd/NiMH 2 NiCd/NiMH ...

Page 18

... 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. 18 __________________Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 (408) 737-7600 © 2000 Maxim Integrated Products Printed USA is a registered trademark of Maxim Integrated Products, Inc ...

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