MAX8860EUA33 Maxim Integrated Products, MAX8860EUA33 Datasheet - Page 5

• Manufacturer Part Number: MAX8860EUA33
• Description: Low Dropout (LDO) Regulators 300mA Linear Regulator
• Manufacturer: Maxim Integrated Products

Specifications of MAX8860EUA33

• Number Of Outputs: 1
• Polarity: Positive
• Input Voltage Max: 6.5 V
• Output Voltage: 1.25 V to 6.5 V or 3.3 V
• Output Type: Adjustable, Fixed
• Dropout Voltage (max): 0.22 V at 200 mA
• Output Current: 300 mA
• Line Regulation: 0.1 % / V
• Load Regulation: 0.0006 % / mA
• Voltage Regulation Accuracy: 1.4 %
• Maximum Power Dissipation: 0.33 W
• Maximum Operating Temperature: + 85 C
• Mounting Style: SMD/SMT
• Package / Case: uMAX
• Minimum Operating Temperature: - 40 C

The MAX8860 is a low-dropout, low-quiescent-current
linear regulator designed primarily for battery-powered
applications. It supplies an adjustable 1.25V to
6.5V output voltage or a fixed-voltage output of 1.8V
(MAX8860EUA18), 2.5V (MAX8860EUA25), 2.77V
(MAX8860EUA27), 2.82V (MAX8860EUA28), 3.0V
(MAX8860EUA30), or 3.3V (MAX8860EUA33) for load
currents up to 300mA. The devices with 2.77V and
2.82V nominal outputs are designed to guarantee mini-
mum output voltages of 2.70V and 2.75V, respectively.
The device consists of a 1.25V reference, error amplifi-
er, MOSFET driver, P-channel pass transistor, Dual
Mode comparator, fault detector, and internal-feedback
voltage divider (Figure 1).
The 1.25V bandgap reference is connected to the error
amplifier’s inverting input. The error amplifier compares
(V
IN
4V
2V
4V
3V
2V
1V
0
0
PIN
1, 4
2
3
5
6
7
8
= V
OUT
FAULT
FAULT
NAME
SHDN
POWER-UP RESPONSE
+ 0.5V, C
GND
OUT
SET
CC
IN
5ms/div
_______________________________________________________________________________________
IN
Regulator Output. Bypass with 2.2µF, low-ESR capacitor to GND for stable operation.
Supply Input. Connect to power source (2.5V to 6.5V). Bypass with 2.2µF capacitor to GND.
Ground
Output Voltage Set. Connect to GND for internally set threshold. Connect to resistor-divider for adjustable
output voltages. See the Output Voltage Selection section for more information.
Compensation Capacitor. Connect a 0.033µF capacitor from CC to GND.
Shutdown Input. Connect to IN for normal operation. Drive SHDN low to turn off the regulator.
Fault Output. A high-impedance, open-drain output. When the MAX8860 is out of regulation, FAULT goes
low. In shutdown, the FAULT pin is high impedance. Connect to GND if unused.
= C
Detailed Description
V
OUT
V
OUT
IN
= 2.2µF, C
CC
= 33nF, T
4V
2V
4V
3V
2V
1V
Typical Operating Characteristics (continued)
0
0
V
A
OUT
POWER-DOWN RESPONSE
V
= +25°C, unless otherwise noted.)
IN
Linear Regulator in µMAX
2ms/div
this reference to the selected feedback voltage and
amplifies the difference. The MOSFET driver reads the
error signal and applies the appropriate drive to the P-
channel pass transistor. If the feedback voltage is lower
than the reference voltage, the pass-transistor gate is
pulled lower, allowing more current to pass and
increasing the output voltage. If the feedback voltage
is higher than the reference voltage, the pass-transistor
gate is driven higher, allowing less current to pass to
the output. The output voltage is fed back through
either an internal resistor voltage divider connected to
OUT, or an external resistor network connected to SET.
The Dual Mode comparator examines V
the feedback path. If V
feedback is used and the output voltage is regulated to
the preset output voltage. Additional blocks include an
output current limiter, reverse battery protection, a ther-
mal sensor, a fault detector, and shutdown logic.
FAULT
FUNCTION
Low-Dropout, 300mA
SHDN
V
OUT
4V
2V
3V
2V
1V
0
0
SET
SHUTDOWN/POWER-UP
is below 60mV, internal
Pin Description
400µs/div
SET
and selects
5