MAX1763EEE Maxim Integrated Products, MAX1763EEE Datasheet

IC CONV DC/DC STEP UP LN 16QSOP

MAX1763EEE

Manufacturer Part Number
MAX1763EEE
Description
IC CONV DC/DC STEP UP LN 16QSOP
Manufacturer
Maxim Integrated Products
Type
Step-Up (Boost)r
Datasheet

Specifications of MAX1763EEE

Internal Switch(s)
Yes
Synchronous Rectifier
Yes
Number Of Outputs
1
Voltage - Output
3.3V, 2.5 ~ 5.5 V
Current - Output
1.5A
Frequency - Switching
1MHz
Voltage - Input
0.7 ~ 5.5 V
Operating Temperature
-40°C ~ 85°C
Mounting Type
Surface Mount
Package / Case
16-QSOP
Power - Output
667mW
Output Voltage
3.3 V
Output Current
1.5 A
Input Voltage
0.7 V to 5.5 V
Supply Current
2.5 mA
Switching Frequency
1200 MHz
Mounting Style
SMD/SMT
Maximum Operating Temperature
+ 85 C
Minimum Operating Temperature
- 40 C
Lead Free Status / RoHS Status
Contains lead / RoHS non-compliant

Available stocks

Company
Part Number
Manufacturer
Quantity
Price
Part Number:
MAX1763EEE
Manufacturer:
MAXIM/美信
Quantity:
20 000
The MAX1763 is a high-efficiency, low-noise, step-up
DC-DC converter intended for use in battery-powered
wireless applications. This device maintains exception-
ally low quiescent supply current (110µA) despite its
high 1MHz operating frequency. Small external compo-
nents and a tiny package make this device an excellent
choice for small hand-held applications that require the
longest possible battery life.
The MAX1763 uses a synchronous-rectified pulse-
width-modulation (PWM) boost topology to generate
2.5V to 5.5V outputs from a wide range of input
sources, such as one to three alkaline or NiCd/NiMH
cells or a single Lithium-ion (Li+) cell. Maxim's propri-
etary Idle Mode™ circuitry significantly improves effi-
ciency at light load currents while smoothly transitioning
to fixed-frequency PWM operation at higher load cur-
rents to maintain excellent full-load efficiency. Low-
noise, forced-PWM mode is available for applications
that require constant-frequency operation at all load
currents. The MAX1763 may also be synchronized to
an external clock to protect sensitive frequency bands
in communications equipment.
The MAX1763 includes an on-chip linear gain block
that can be used to build a high-power external linear
regulator or as a low-battery comparator. Soft-start and
current limit functions permit optimization of efficiency,
external component size, and output voltage ripple.
The MAX1763 is available in a space-saving 16-pin
QSOP package or a high-power (1.5W) 16-pin TSSOP-
EP package.
19-1698; Rev 1; 2/01
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.
PWM
0.7V TO 5.5V
OR NORMAL
BLOCK INPUT
OFF
ON
LBI OR GAIN
IN
Typical Operating Circuit
________________________________________________________________ Maxim Integrated Products
ON
OFF
General Description
ONB
ONA
CLK/SEL
AIN
ISET
REF
FB
MAX1763
1.5µH
GND
PGND
POUT
OUT
AO
LX
1.5A, Low-Noise, 1MHz, Step-Up
GAIN BLOCK OUTPUT
3.3V AT 1.5A
LBO OR
OUT
♦ Up to 94% Efficiency
♦ +0.7V to +5.5V Input Voltage Range
♦ 1.1V Guaranteed Startup Input Voltage
♦ Up to 1.5A Output
♦ Fixed 3.3V Output or Adjustable (2.5V to 5.5V)
♦ 1MHz PWM Synchronous-Rectified Topology
♦ 1µA Logic-Controlled Shutdown
♦ Analog Gain Block for Linear-Regulator or Low-
♦ Adjustable Current Limit and Soft-Start
♦ 1.5W TSSOP Package Available
*EP = Exposed pad
________________________Applications
Idle Mode is a trademark of Maxim Integrated Products.
MAX1763EEE
MAX1763EUE
Battery Comparator
Digital Cordless
Phones
PCS Phones
Wireless Handsets
TOP VIEW
PART
GND
DC-DC Converter
ONA
ISET
OUT
REF
AIN
AO
FB
1
2
6
3
4
5
7
8
-40°C to +85°C
-40°C to +85°C
TEMP RANGE
Ordering Information
TSSOP-EP
MAX1763
QSOP
Pin Configuration
Hand-Held
Instruments
Palmtop Computers
Personal
Communicators
16
15
14
13
12
11
10
9
ONB
POUT
LX
POUT
PGND
LX
PGND
CLK/SEL
16 QSOP
16 TSSOP-EP*
PIN-PACKAGE
Features
1

Related parts for MAX1763EEE

MAX1763EEE Summary of contents

Page 1

... Analog Gain Block for Linear-Regulator or Low- Battery Comparator ♦ Adjustable Current Limit and Soft-Start ♦ 1.5W TSSOP Package Available ________________________Applications Digital Cordless Phones PCS Phones Wireless Handsets PART MAX1763EEE MAX1763EUE *EP = Exposed pad Idle Mode is a trademark of Maxim Integrated Products. TOP VIEW OUT LX 3.3V AT 1.5A POUT OUT ...

Page 2

Low-Noise, 1MHz, Step-Up DC-DC Converter ABSOLUTE MAXIMUM RATINGS ONA, ONB, AO, OUT to GND.......................................0.3V, +6V PGND to GND.....................................................................±0. PGND ............................................-0. CLK/SEL, REF, FB, ISET, POUT, AIN to GND.........................................-0. POUT to OUT ......................................................................±0.3V Stresses ...

Page 3

ELECTRICAL CHARACTERISTICS (continued) (CLK/SEL = ONB = FB = PGND = GND, ISET = REF, OUT = POUT, V wise noted. Typical values are +25°C.) A PARAMETER DC-DC SWITCHES POUT Leakage Current V LX Leakage Current V ...

Page 4

Low-Noise, 1MHz, Step-Up DC-DC Converter ELECTRICAL CHARACTERISTICS (CLK/SEL = ONB = FB = PGND = GND, ISET = REF, OUT = POUT, V wise noted.) (Note 8) PARAMETER DC-DC CONVERTER Input Voltage Range (Note ...

Page 5

ELECTRICAL CHARACTERISTICS (continued) (CLK/SEL = ONB = FB = PGND = GND, ISET = REF, OUT = POUT, V wise noted.) (Note 8) PARAMETER LOGIC INPUTS Gain-Block Enable Threshold ( (Note 6) OUT AIN Gain-Block Disable Threshold ...

Page 6

Low-Noise, 1MHz, Step-Up DC-DC Converter (Circuit of Figure +3.6V +5V OUT EFFICIENCY vs. OUTPUT CURRENT (V = 3.3V) OUT 100 ...

Page 7

Figure +3.6V OUT LIGHT-LOAD SWITCHING WAVEFORMS 200ns/div V = 1.1V 3.3V 20mA IN OUT OUT A: LX NODE, 5V/div B: INDUCTOR CURRENT, 0.1A/div, AC COUPLED C: ...

Page 8

Low-Noise, 1MHz, Step-Up DC-DC Converter PIN NAME On Control Input. When ONA = high or ONB = low, the IC turns on. Connect ONA to OUT for normal 1 ONA operation (Table 3). N-Channel Current Limit Control. For maximum ...

Page 9

UNDERVOLTAGE LOCKOUT OUT IC POWER 2.15V ONA ON ONB REFERENCE 1.25V REF REF GND CLK/SEL FB ISET AIN Figure 1. Functional Diagram Table 1. Typical Available Output Current INPUT OUTPUT NUMBER VOLTAGE VOLTAGE OF CELLS (V) 1 NiCd/NiMH 1.2 2.4 ...

Page 10

Low-Noise, 1MHz, Step-Up DC-DC Converter Table 2. Selecting the Operating Mode CLK/SEL MODE Normal 0 operation 1 Forced PWM External clock S ynchr oni zed 500kHz to 1.2MHz P WM block can also function as a voltage-monitoring com- parator. ...

Page 11

Table 3. On/Off Logic Control ONB ONA OUT POUT R3 MAX1763 AIN AO R4 Figure 3. Using the Gain Block as a Power-OK Comparator V IN 1.8V ...

Page 12

Low-Noise, 1MHz, Step-Up DC-DC Converter in dropout, the MOSFET on-resistance will determine the dropout voltage ( DROPOUT lower R PFET is used, increase the linear-regula- DS(ON) tor output filter capacitance to maintain stability. The output capacitance can ...

Page 13

Table 4. Component Selection Guide INDUCTORS CAPACITORS AVX TPS series Coilcraft LPT3305 Kemet T510 series Sanyo POSCAP series Sumida Panasonic SP/CB resistance of the package from +115°C/W for QSOP to +53°C/W for the TSSOP-EP ambient temperature of +70°C, ...

Page 14

Low-Noise, 1MHz, Step-Up DC-DC Converter electrolytic capacitors; their high ESR typically results in higher output ripple voltage. Bypass Components A few ceramic bypass capacitors are required for prop- er operation. Bypass REF to GND with 0.22µF. Also, bypass OUT ...

Page 15

... Note: The MAX1763EEE is a 16-pin QSOP and does not have a heat slug. Use the MAX1763EUE for higher power dissipation. ______________________________________________________________________________________ 1.5A, Low-Noise, 1MHz, Step-Up DC-DC Converter Package Information 15 ...

Page 16

... 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. 16 ____________________Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600 © 2001 Maxim Integrated Products Package Information (continued) Printed USA is a registered trademark of Maxim Integrated Products ...

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