MAX1819EBL33+T Maxim Integrated Products, MAX1819EBL33+T Datasheet - Page 8

• Manufacturer Part Number: MAX1819EBL33+T
• Description: IC REG LDO 3.3V/ADJ 500MA 6-UCSP
• Manufacturer: Maxim Integrated Products

Specifications of MAX1819EBL33+T

• Regulator Topology: Positive Fixed or Adjustable
• Voltage - Output: 3.3V, 1.25 ~ 5 V
• Voltage - Input: 2.5 ~ 5.5 V
• Voltage - Dropout (typical): 0.133V @ 500mA, -
• Number Of Regulators: 1
• Current - Output: 500mA (Min)
• Operating Temperature: -40°C ~ 85°C
• Mounting Type: Surface Mount
• Package / Case: 6-UCSP®
• Number Of Outputs: 1
• Polarity: Positive
• Input Voltage Max: 5.5 V
• Output Voltage: 1.25 V to 5 V, 3.3 V
• Output Type: Adjustable, Fixed
• Dropout Voltage (max): 0.232 V at 500 mA
• Output Current: 500 mA
• Line Regulation: 0 %
• Load Regulation: 0.4 %
• Voltage Regulation Accuracy: 1 %
• Maximum Power Dissipation: 0.84 W
• Maximum Operating Temperature: + 85 C
• Mounting Style: SMD/SMT
• Minimum Operating Temperature: - 40 C
• Reference Voltage: 1.25 V
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Current - Limit (min): -
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant

Capacitors are required at the MAX1819’s input and
output for stable operation over the full temperature
range and with load currents up to 500mA. Connect a
1µF capacitor between IN and ground and a 3.3µF low-
ESR capacitor between OUT and ground. For output
voltages less than 2V, use a 4.7µF low-ESR output
capacitor. The input capacitor (C
impedance of the input supply. Reduce noise and
improve load-transient response, stability, and power-
supply rejection by using larger output capacitors, such
as 10µF.
The output capacitor’s (C
tance (ESR) affects stability and output noise. Use out-
put capacitors with an ESR of 0.1Ω or less to ensure
stability and optimum transient response. Surface-
mount ceramic capacitors have very low ESR and are
commonly available in values up to 10µF. C
C
The MAX1819 is designed to operate with low dropout
voltages and low quiescent currents in battery-powered
systems 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.
500mA Low-Dropout Linear Regulator in UCSP
8
OUT
_______________________________________________________________________________________
use short traces to connect to the MAX1819.
Noise, PSRR, and Transient Response
Applications Information
Capacitor Selection and
OUT
) equivalent series resis-
Regulator Stability
IN
) lowers the source
IN
and
The MAX1819 load-transient response (see the Typical
Operating Characteristics) shows two components of
the output response: a DC shift from the output imped-
ance due to the load current change, and the transient
response. Increasing the output capacitor’s value and
decreasing the ESR attenuates the overshoot.
A regulator’s minimum input-to-output voltage differential
(dropout voltage) determines the lowest usable supply
voltage. In battery-powered systems, this determines the
useful end-of-life battery voltage. Because the MAX1819
uses a P-channel MOSFET pass transistor, its dropout
voltage is a function of drain-to-source on-resistance
(R
Operating Characteristics).
The MAX1819 ground current remains at approximately
150µA in dropout.
TRANSISTOR COUNT: 845
DS(ON)
V
DROPOUT
) multiplied by the load current (see the Typical
Input-Output (Dropout) Voltage
= V
IN
- V
OUT
Chip Information
= R
DS(ON)
× I
OUT