MAX1589AETT150+T Maxim Integrated Products, MAX1589AETT150+T Datasheet - Page 8

• Manufacturer Part Number: MAX1589AETT150+T
• Description: IC REG LDO 1.5V 500MA 6TDFN
• Manufacturer: Maxim Integrated Products

Specifications of MAX1589AETT150+T

• Regulator Topology: Positive Fixed
• Voltage - Output: 1.5V
• Voltage - Input: 1.62 ~ 3.6 V
• Number Of Regulators: 1
• Current - Output: 500mA (Min)
• Current - Limit (min): 550mA
• Operating Temperature: -40°C ~ 85°C
• Mounting Type: Surface Mount
• Package / Case: 6-TDFN Exposed Pad
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Voltage - Dropout (typical): -
• Lead Free Status / Rohs Status: Details

Figure 2. Power Operating Regions for 6-Pin SOT23: Maximum
Output Current vs. Input Voltage
capacitors to reduce noise and improve load-transient
response, stability, and power-supply rejection.
The output capacitor’s equivalent series resistance
(ESR) affects stability and output noise. Use output
capacitors with an ESR of 30mΩ or less to ensure sta-
bility and optimize transient response. Surface-mount
ceramic capacitors have very low ESR and are com-
monly available in values up to 10µF. Connect C
C
mize the impact of PC board trace inductance.
The MAX1589A 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.
The MAX1589A load-transient response (see the
Typical Operating Characteristics) shows two compo-
Low-Input-Voltage, 500mA LDO Regulator
with R R E E S S E E T T in SOT and TDFN
8
OUT
_______________________________________________________________________________________
as close to the MAX1589A as possible to mini-
Noise, PSRR, and Transient Response
600
500
400
300
200
100
0
0
MAXIMUM RECOMMENDED
OUTPUT CURRENT 6-PIN SOT23
MAXIMUM OUTPUT CURRENT
(POWER DISSIPATION LIMIT)
0.5
vs. INPUT VOLTAGE
1.0
(V
IN
- V
1.5
OUT
) (V)
2.0
T
T
A
A
2.5
= +85°C
= +70°C
3.0
IN
and
nents of the output response: a near-zero DC shift from
the output impedance due to the load-current change,
and the transient response. A typical transient response
for a step change in the load current from 100mA to
500mA is 35mV. Increasing the output capacitor’s value
and decreasing the ESR attenuates the overshoot.
A regulator’s minimum input-output voltage difference
(dropout voltage) determines the lowest usable supply
voltage. In battery-powered systems, this determines
the useful end-of-life battery voltage. Because the
MAX1589A uses a p-channel MOSFET pass transistor, its
dropout voltage is a function of drain-to-source on-resis-
tance (R
(see the Typical Operating Characteristics):
The MAX1589A ground current reduces to 70µA in
dropout.
TRANSISTOR COUNT: 2556
PROCESS: BiCMOS
Figure 3. Power Operating Region for 6-Pin TDFN: Maximum
Output Current vs. Input Voltage
V
DS(ON)
DROPOUT
600
500
400
300
200
100
0
Input-Output (Dropout) Voltage
0
= 0.33Ω) multiplied by the load current
MAXIMUM RECOMMENDED
OUTPUT CURRENT 6-PIN TDFN
= V
MAXIMUM OUTPUT CURRENT
(POWER DISSIPATION LIMIT)
0.5
IN
vs. INPUT VOLTAGE
1.0
- V
(V
IN
OUT
- V
Chip Information
1.5
OUT
) (V)
= 0.33Ω
2.0
T
A
2.5
= +85°C
✕
I
OUT
3.0