MAX1686EUA+ Maxim Integrated Products, MAX1686EUA+ Datasheet

IC CHARGE PUMP SIM CARD 8UMAX

MAX1686EUA+

Manufacturer Part Number
MAX1686EUA+
Description
IC CHARGE PUMP SIM CARD 8UMAX
Manufacturer
Maxim Integrated Products
Datasheet
1.MAX1686EUA.pdf (8 pages)

Specifications of MAX1686EUA+

Applications
Charge Pump, SIM Cards
Voltage - Input
2.7 ~ 4.2 V
Number Of Outputs
1
Voltage - Output
4.75V
Operating Temperature
-40°C ~ 85°C
Mounting Type
Surface Mount
Package / Case
8-MSOP, Micro8™, 8-uMAX, 8-uSOP,
Function
Step Up
Output Voltage
4.75 V
Output Current
12 mA
Maximum Operating Temperature
+ 85 C
Minimum Operating Temperature
- 40 C
Mounting Style
SMD/SMT
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
The MAX1686 provides power for dual-voltage sub-
scriber ID module (SIM) cards in portable applications
such as GSM cellular phones. Designed to reside in the
portable unit (cellular phone handset), the 1MHz charge
pump converts a 2.7V to 4.2V input to regulated 5V out-
put. The MAX1686H has a nominal output voltage of
5.0V, while the MAX1686 is set to 4.75V to reduce SIM-
card current drain. The charge pump has only 45µA qui-
escent supply current, which reduces to 3µA when a
3V-capable SIM card is being powered and the charge
pump is disabled. An internal input/output shorting
switch provides power for 3V SIM cards.
The MAX1686/MAX1686H require only three external
capacitors around their space-saving, thin (1mm) 8-pin
µMAX packages.
19-1376; Rev 1; 12/98
For free samples & the latest literature: http://www.maxim-ic.com, or phone 1-800-998-8800.
For small orders, phone 1-800-835-8769.
2.7V TO 4.2V
INPUT
C
IN
GSM Cellular Phones
PCS Phones
Portable POS Terminals
Personal Communicators
Typical Operating Circuit
________________________________________________________________ Maxim Integrated Products
IN
SHDN
3/5
CXN
GND
General Description
MAX1686H
MAX1686
C
X
PGND
CXP
OUT
Applications
V
C
IN
OUT
OR 5V/20mA
OUTPUT
Charge Pumps for SIM Cards
MAX1686EUA
MAX1686HEUA
12mA min Charge-Pump Output Current
45µA Quiescent Supply Current
0.1µA Supply Current in Shutdown Mode
5.0V Regulated Charge-Pump Output (MAX1686H)
4.75V Regulated Charge-Pump Output (MAX1686)
Input-Output Shorting Switch for 3V Cards
Small External Components
(Uses a 0.047µF, 0.1µF, and a 2.2µF Capacitor)
Output Driven to Ground in Shutdown Mode
Super-Small 8-Pin µMAX Package
Soft-Start and Short-Circuit Protection
2.7V to 4.2V Input Range
TOP VIEW
PART
3V to 5V Regulating
SHDN
GND
3/5
IN
1
2
3
4
TEMP. RANGE
-40°C to +85°C
-40°C to +85°C
Ordering Information
MAX1686H
MAX1686
MAX
Pin Configuration
7
6
5
8
PIN-PACKAGE
OUT
CXP
CXN
PGND
8 µMAX
8 µMAX
Features
1

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MAX1686EUA+ Summary of contents

Page 1

... MAX1686 MAX1686H SHDN 3/5 GND PGND ________________________________________________________________ Maxim Integrated Products For free samples & the latest literature: http://www.maxim-ic.com, or phone 1-800-998-8800. For small orders, phone 1-800-835-8769 Regulating Charge Pumps for SIM Cards 2.7V to 4.2V Input Range 12mA min Charge-Pump Output Current 45µ ...

Page 2

Regulating Charge Pumps for SIM Cards ABSOLUTE MAXIMUM RATINGS IN, OUT, SHDN, 3/5 to GND.....................................-0.3V to +6V CXP to GND..............................................-0. CXN to GND ................................................-0. PGND to GND ......................................................-0. 0.3V OUT Short ...

Page 3

Typical Operating Circuit , C = 0.47µ EFFICIENCY vs. LOAD CURRENT (5V MODE 0.1 ...

Page 4

Regulating Charge Pumps for SIM Cards (See Typical Operating Circuit , C = 0.47µ OUTPUT WAVEFORM (I = 1mA) LOAD V OUT (20mV/div) 25µs/div 5V MODE, AC COUPLED 0.1 F OUT ...

Page 5

PIN NAME 3V/5V Select Input. When low, the output is regulated at 4.75V for MAX1686, 5.00V for MAX1686H. When 1 3/5 high, the output is shorted to the input. SHDN Active-Low Shutdown Input. SHDN = GND is off. Output is ...

Page 6

Regulating Charge Pumps for SIM Cards 1µA. Other features include soft-start, undervoltage lockout, and short-circuit protection. Charge-Pump Control Figure 2 shows an idealized, unregulated charge-pump voltage doubler. The oscillator runs at a 50% duty cycle. During one ...

Page 7

The extra 0.1µF capacitor improves start-up capability under full load and reduces output ripple for high input voltages. Table 2 lists the recommended capacitor manufacturers. Low-ESR ...

Page 8

... Maxim reserves the right to change the circuitry and specifications without notice at any time. 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 _____________________Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600 © 1998 Maxim Integrated Products © ...

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