MAX1686HEUA Maxim Integrated Products, MAX1686HEUA Datasheet - Page 5

• Manufacturer Part Number: MAX1686HEUA
• Description: IC CHRG PUMP FOR SIM CARD 8-UMAX
• Manufacturer: Maxim Integrated Products

Specifications of MAX1686HEUA

• Applications: Charge Pump, SIM Cards
• Voltage - Input: 2.7 ~ 4.2 V
• Number Of Outputs: 1
• Voltage - Output: 5V
• Operating Temperature: -40°C ~ 85°C
• Mounting Type: Surface Mount
• Package / Case: 8-MSOP, Micro8™, 8-uMAX, 8-uSOP,
• Function: Step Up
• Output Voltage: 5 V
• Output Current: 12 mA
• Maximum Operating Temperature: + 85 C
• Minimum Operating Temperature: - 40 C
• Mounting Style: SMD/SMT
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant

The MAX1686/MAX1686H charge pumps provide two
modes of operation: 3V mode or 5V mode. The devices
consist of an error amplifier, a 1.23V bandgap refer-
ence, an internal resistive feedback network, a 1MHz
oscillator, high-current MOSFET drivers and switches,
and a power-management block as shown in the
Functional Diagram (Figure 1). In 3V mode (3/5 = IN),
the input is connected to the output through a 2.5Ω
switch. In 5V mode (3/5 = GND), the MAX1686’s output
Figure 1. Functional Diagram
_______________Detailed Description
PIN
1
2
3
4
5
6
7
8
NAME
SHDN
PGND
GND
CXN
OUT
CXP
3/5
SHDN
PGND
IN
3/5
IN
_______________________________________________________________________________________
3V/5V Select Input. When low, the output is regulated at 4.75V for MAX1686, 5.00V for MAX1686H. When
high, the output is shorted to the input.
Active-Low Shutdown Input. SHDN = GND is off. Output is actively pulled low in shutdown.
Supply Input Pin. Can range from 2.7V to 4.2V. Bypass to ground with a ceramic capacitor.
Ground Pin
Power Ground. Connect to GND through a short trace.
Negative Terminal of the Charge-Pump Transfer Capacitor
Positive Terminal of the Charge-Pump Transfer Capacitor
Power Output. Bypass to GND with an output filter capacitor.
S1
CXN
C
X
SS
CXP
MANAGEMENT
OSC
S2
Charge Pumps for SIM Cards
POWER
EN
PWROK
DIS
voltage is regulated at 4.75V (5.00V for the MAX1686H)
with a 2.7V to 4.2V input and can deliver more than
12mA of load current.
Designed specifically for compact applications, these
regulators require only three small external capacitors.
The Skip Mode control scheme provides high efficiency
over a wide output current range. The devices offer a
shutdown feature which actively discharges the output
to ground and reduces the supply current to less than
FUNCTION
3V to 5V Regulating
1.23V
MAX1686H
MAX1686
Pin Description
OUT
GND
5