MAX1935ETA15+T Maxim Integrated Products, MAX1935ETA15+T Datasheet - Page 8

• Manufacturer Part Number: MAX1935ETA15+T
• Description: IC REG LINEAR 500MA 8-TDFN
• Manufacturer: Maxim Integrated Products

Specifications of MAX1935ETA15+T

• Regulator Topology: Positive Fixed
• Voltage - Output: 1.5V
• Voltage - Input: 2.25 ~ 5.5 V
• Number Of Regulators: 1
• Current - Output: 500mA (Min)
• Operating Temperature: -40°C ~ 85°C
• Mounting Type: Surface Mount
• Package / Case: 8-TDFN Exposed Pad
• Number Of Outputs: 1
• Polarity: Positive
• Input Voltage Max: 5.5 V
• Output Voltage: 1.5 V
• Output Type: Fixed
• Output Current: 500 mA
• Line Regulation: 0 % / V
• Voltage Regulation Accuracy: 2.5 %
• Maximum Power Dissipation: 1.95 W
• Maximum Operating Temperature: + 85 C
• Mounting Style: SMD/SMT
• Minimum Operating Temperature: - 40 C
• Reference Voltage: 0.8 V
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Voltage - Dropout (typical): -
• Current - Limit (min): -
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant

500mA, Low-Voltage Linear Regulator
in Tiny QFN
Figure 1. Functional Diagram
a direct heat conduction path from the die to the PC
board. Connect the exposed backside pad and GND to
the system ground using a large pad or ground plane,
or multiple vias to the ground plane layer.
The MAX1935 delivers up to 0.5A(RMS) and operates
with input voltages up to 5.5V, but not simultaneously.
High output currents can only be sustained when input-
output differential is within the limits outlined.
Connect a 1µF capacitor between IN and ground and a
10µF low equivalent series-resistance (ESR) capacitor
between OUT and ground. The input capacitor (C
lowers the source impedance of the input supply.
Reduce noise and improve load-transient response,
stability, and power-supply rejection by using larger
8
VOLTAGE (V
_______________________________________________________________________________________
ON
LOGIC SUPPLY
1µF
C
2.25V TO 5.5V
IN
OFF
V
IN
OUT
Capacitor Selection and Regulator
µC
TO
)
100kΩ
Applications Information
R
POK
SHDN
IN
IN
POK
MAX1935
SHUTDOWN
LOGIC
Stability
AMPLIFIER
93% V
ERROR
IN
DRIVER WITH
REF
)
MOSFET
I
LIM
output capacitors. The output capacitor’s (C
affects stability and output noise. Use output capacitors
with an ESR of 0.1Ω or less to ensure stability and opti-
mum transient response. Surface-mount ceramic
capacitors have very low ESR and are commonly avail-
able in values up to 10µF. Connect C
close to the MAX1935 as possible.
The MAX1935 is designed to operate with low dropout
voltages and low quiescent currents, while still
maintaining good noise, transient response, and AC
rejection. See the Typical Operating Characteristics for
a plot of Power-Supply Rejection Ratio (PSRR) vs.
Frequency. When operating from noisy sources,
improved supply-noise rejection and transient response
can be achieved by increasing the values of the input
and output bypass capacitors and through passive-
filtering techniques. The MAX1935 load-transient
0.8V
V
REF
Noise, PSRR, and Transient Response
THERMAL
SENSOR
80mV
GND
OUT
OUT
SET
PRESET MODE
0.8V TO 3.3V
V
IN
OUT
and C
OUT
C
10µF
OUT
OUT
) ESR
as