MAX1589AEZT180+ [MAXIM]

Fixed Positive LDO Regulator, 1.8V, 0.35V Dropout, BICMOS, PDSO6, 1.10 MM HEIGHT, LEAD FREE, MO-193, TSOT-23, 6 PIN;
MAX1589AEZT180+
型号: MAX1589AEZT180+
厂家: MAXIM INTEGRATED PRODUCTS    MAXIM INTEGRATED PRODUCTS
描述:

Fixed Positive LDO Regulator, 1.8V, 0.35V Dropout, BICMOS, PDSO6, 1.10 MM HEIGHT, LEAD FREE, MO-193, TSOT-23, 6 PIN

信息通信管理 光电二极管
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19-3664; Rev 0; 4/05  
Low-Input-Voltage, 500mA LDO Regulator  
RESET  
with  
in SOT and TDFN  
General Description  
Features  
o Low 1.62V Minimum Input Voltage  
o Guaranteed 500mA Output Current  
The MAX1589A low-dropout linear regulator operates  
from a +1.62V to +3.6V supply and delivers a guaran-  
teed 500mA continuous load current with a low 175mV  
dropout. The high-accuracy ( 0.5%) output voltage is  
preset to internally trimmed voltages from +0.75V to  
+3.0V. An active-low, open-drain reset output remains  
asserted for at least 70ms after the output voltage reach-  
es regulation. This device is offered in 6-pin thin SOT23  
and 6-pin, 3mm x 3mm thin DFN packages.  
o
0.5ꢀ Initial Accuracy  
o Low 175mV Dropout at 500mA Load  
o 70ms RESET Output Flag  
o Supply Current Independent of Load and Dropout  
Voltage  
o Logic-Controlled Shutdown  
o Thermal-Overload and Short-Circuit Protection  
o Preset Output Voltages (0.75V, 1.0V, 1.3V, 1.5V,  
An internal pMOS pass transistor maintains low supply  
current, independent of load and dropout voltage, making  
the MAX1589A ideal for portable battery-powered equip-  
ment such as personal digital assistants (PDAs), digital  
still cameras, cell phones, cordless phones, and note-  
book computers. Other features include logic-controlled  
shutdown, short-circuit protection, and thermal-overload  
protection.  
1.8V, 2.5V, and 3.0V)  
o Tiny 6-Pin Thin SOT23 Package (<1.1mm High)  
o Thin 6-Pin TDFN Package (<0.8mm High)  
Ordering Information  
PART*  
MAX1589AEZT_ _ _+T -40°C to +85°C 6 Thin SOT23-6  
MAX1589AETT_ _ _ + -40°C to +85°C 6 TDFN  
TEMP RANGE PIN-PACKAGE  
*Insert the desired three-digit suffix (see the Selector Guide) into  
the blanks to complete the part number. Contact the factory for  
other output voltages.  
Applications  
+Denotes lead-free packaging.  
Notebook Computers  
Cellular and PCS Phones  
Personal Digital Assistants (PDAs)  
Handheld Computers  
Digital Still Cameras  
Selector Guide  
MAX1589A  
TOP MARK  
V
OUT  
(V)  
SUFFIX  
SOT  
TDFN  
ALG  
ALH  
ALI  
0.75  
1.00  
1.30  
1.50  
1.80  
2.50  
3.00  
075  
100  
130  
150  
180  
250  
300  
AACC  
AACD  
AACE  
AACF  
AACG  
AACH  
AACI  
PCMCIA Cards  
CD and MP3 Players  
ALJ  
ALK  
ALF  
ALL  
Typical Operating Circuit  
Pin Configurations  
TOP VIEW  
INPUT  
OUTPUT  
1.62V TO 3.6V  
0.75V TO 3.0V  
500mA  
IN  
OUT  
6
1
5
4
C
C
OUT  
4.7 F  
IN  
1 F  
1
2
3
6
IN  
GND  
OUT  
I.C.  
LOGIC  
SUPPLY  
MAX1589A  
MAX1589A  
MAX1589A  
100k  
5
4
ON  
SHDN  
TO C  
RESET  
2
3
SHDN  
RESET  
OFF  
GND  
TDFN  
3mm x 3mm  
THIN SOT23  
________________________________________________________________ Maxim Integrated Products  
1
For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at  
1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com.  
Low-Input-Voltage, 500mA LDO Regulator  
RESET  
with  
in SOT and TDFN  
ABSOLUTE MAXIMUM RATINGS  
IN, SHDN, RESET to GND.....................................-0.3V to +4.0V  
OUT to GND ................................................-0.3V to (V + 0.3V)  
Output Short-Circuit Duration.....................................Continuous  
Operating Temperature Range ...........................-40°C to +85°C  
Junction Temperature..................................................... +150°C  
Storage Temperature Range.............................-65°C to +150°C  
Lead Temperature (soldering, 10s) .................................+300°C  
IN  
Continuous Power Dissipation (T = +70°C)  
A
6-Pin Thin SOT23 (derate 9.1mW/°C above +70°C)....727mW  
6-Pin TDFN (derate 24.4mW/°C above +70°C) .........1951mW  
Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional  
operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to  
absolute maximum rating conditions for extended periods may affect device reliability.  
ELECTRICAL CHARACTERISTICS  
(V = (V  
+ 0.5V) or 1.8V, whichever is greater; SHDN = IN, C = 1µF, C  
= 4.7µF, T = -40°C to +85°C, unless otherwise  
OUT A  
IN  
OUT  
IN  
noted. Typical values are at T = +25°C.) (Note 1)  
A
PARAMETER  
Input Voltage  
SYMBOL  
CONDITIONS  
MIN  
1.62  
1.30  
-0.5  
TYP  
MAX  
3.60  
1.60  
+0.5  
UNITS  
V
V
V
IN  
Input Undervoltage Lockout  
V
V
rising (180mV typical hysteresis)  
UVLO  
IN  
I
= 150mA, T = +25°C  
OUT  
A
Output Voltage Accuracy  
%
I
V
= 1mA to 500mA,  
OUT  
-1.5  
+1.5  
= (V  
+ 0.5V) to +3.6V  
OUT  
IN  
Maximum Output Current  
Current Limit  
I
Continuous  
= 96% of nominal value  
500  
550  
mA  
RMS  
OUT  
I
V
850  
70  
1150  
140  
mA  
LIM  
OUT  
No load  
= 500mA  
Ground Current  
I
µA  
I
90  
Q
OUT  
Dropout (Note 2)  
70  
Dropout Voltage  
Load Regulation  
Line Regulation  
Output Noise  
PSRR  
V
- V  
I
I
= 500mA, V  
OUT  
1.8V (Note 2)  
175  
0.02  
350  
0.5  
mV  
%
IN  
OUT  
OUT  
OUT  
V
LDR  
= 1mA to 500mA  
+ 0.5V) to +3.6V, I  
V
LNR  
V
= (V  
= 100mA  
-0.15 +0.01 +0.15  
%/V  
IN  
OUT  
OUT  
10Hz to 100kHz, I  
= 10mA  
86  
70  
µV  
RMS  
OUT  
f < 1kHz, I  
= 10mA  
dB  
OUT  
SHUTDOWN  
T
T
= +25°C  
= +85°C  
0.001  
0.01  
1
A
Shutdown Supply Current  
SHDN Input Logic Levels  
SHDN Input Bias Current  
I
SHDN = GND  
µA  
V
OFF  
A
V
V
V
= 1.62V to 3.6V  
1.4  
IH  
IN  
IN  
V
= 1.62V to 3.6V  
0.6  
IL  
T
T
= +25°C  
= +85°C  
1
5
300  
A
I
V
= 0V or 3.6V  
nA  
µs  
SHDN  
SHDN  
A
Turn-On Delay  
From SHDN high to OUT high, V  
= 1.5V  
90  
OUT  
RESET OUTPUT  
Reset Threshold Accuracy  
V
falling (1.7% typical hysteresis)  
80  
82.5  
1.5  
3
85  
%V  
OUT  
OUT  
I
= 100µA  
100  
100  
RESET  
RESET Output Low Voltage  
V
mV  
OL  
V
= +1.0V, I  
= 100µA  
RESET  
IN  
2
_______________________________________________________________________________________  
Low-Input-Voltage, 500mA LDO Regulator  
RESET  
with  
in SOT and TDFN  
ELECTRICAL CHARACTERISTICS (continued)  
(V = (V  
+ 0.5V) or 1.8V, whichever is greater; SHDN = IN, C = 1µF, C  
= 4.7µF, T = -40°C to +85°C, unless otherwise  
OUT A  
IN  
OUT  
IN  
noted. Typical values are at T = +25°C.) (Note 1)  
A
PARAMETER  
RESET Output High  
SYMBOL  
CONDITIONS  
MIN  
TYP  
0.001  
0.01  
100  
MAX  
UNITS  
µA  
T
A
T
A
= +25°C  
= +85°C  
1
V
= 3.6V,  
RESET  
I
OH  
Leakage Current  
RESET not asserted  
Reset Delay  
t
From V  
high to RESET rising  
OUT  
70  
160  
ms  
RP  
THERMAL PROTECTION  
Thermal-Shutdown Temperature  
Thermal-Shutdown Hysteresis  
T
+165  
15  
°C  
°C  
SHDN  
T
SHDN  
Note 1: Limits are 100% production tested at T = +25°C. Limits over the operating temperature range are guaranteed by design.  
A
Note 2: The dropout voltage is defined as V - V  
, when V  
is 4% lower than the value of V  
when V = V  
+ 0.5V.  
OUT  
IN  
OUT  
OUT  
IN  
OUT  
Typical Operating Characteristics  
(V = (V  
IN  
+ 0.5V) or 1.8V, whichever is greater; SHDN = IN, C = 1µF, C  
= 4.7µF, T = +25°C, unless otherwise noted.)  
OUT  
IN  
OUT  
A
OUTPUT VOLTAGE ACCURACY  
vs. LOAD CURRENT  
OUTPUT VOLTAGE ACCURACY  
vs. INPUT VOLTAGE  
OUTPUT VOLTAGE ACCURACY  
vs. TEMPERATURE  
0.2  
0.1  
0
0.50  
0.25  
0
1.5  
V
= +1.5V  
V
= +1.5V  
OUT  
OUT  
1.0  
0.5  
0
I
= 0mA  
OUT  
I
= 0mA, 100mA, 500mA  
OUT  
V
= +1.5V  
OUT  
I
= 100mA  
OUT  
-0.5  
-1.0  
-1.5  
V
= +3.0V  
OUT  
-0.1  
-0.25  
-0.50  
I
= 500mA  
OUT  
V
= +0.75V  
OUT  
-0.2  
0
100  
200  
300  
400  
500  
1.4  
1.8  
2.2  
2.6  
3.0  
3.4  
-40  
-15  
10  
35  
60  
85  
LOAD CURRENT (mA)  
INPUT VOLTAGE (V)  
TEMPERATURE ( C)  
GROUND-PIN CURRENT  
vs. LOAD CURRENT  
GROUND-PIN CURRENT  
vs. INPUT VOLTAGE  
GROUND-PIN CURRENT  
vs. TEMPERATURE  
120  
110  
100  
90  
120  
100  
80  
60  
40  
20  
0
100  
90  
80  
70  
60  
50  
I
= 100mA  
OUT  
V
= +1.5V  
OUT  
V
= +3.0V  
OUT  
I
= 500mA  
OUT  
I
= 1mA TO 500mA  
OUT  
V
= +1.5V  
OUT  
V
= +0.75V  
OUT  
I
= 0mA  
OUT  
80  
I
= 0mA  
OUT  
70  
V
= +1.5V  
OUT  
60  
0.01  
0.1  
1
10  
100  
1000  
1.2  
1.6  
2.0  
2.4  
2.8  
3.2  
3.6  
-40  
-15  
10  
35  
60  
85  
LOAD CURRENT (mA)  
INPUT VOLTAGE (V)  
TEMPERATURE ( C)  
_______________________________________________________________________________________  
3
Low-Input-Voltage, 500mA LDO Regulator  
RESET  
with  
in SOT and TDFN  
Typical Operating Characteristics (continued)  
(V = (V  
IN  
+ 0.5V) or 1.8V, whichever is greater; SHDN = IN, C = 1µF, C  
= 4.7µF, T = +25°C, unless otherwise noted.)  
OUT  
IN  
OUT  
A
DROPOUT VOLTAGE  
vs. LOAD CURRENT  
POWER-SUPPLY REJECTION RATIO  
vs. FREQUENCY  
200  
160  
120  
80  
80  
V
= +1.5V  
OUT  
70  
60  
50  
40  
30  
20  
10  
0
V
= +0.75V  
OUT  
V
= +3.0V  
OUT  
V
= +1.8V  
OUT  
V
= +3.0V  
OUT  
40  
I
= 10mA  
1
OUT  
0
0
100  
200  
300  
400  
500  
0.1  
10  
FREQUENCY (kHz)  
100  
1000  
LOAD CURRENT (mA)  
LINE-TRANSIENT RESPONSE  
NEAR DROPOUT  
LINE-TRANSIENT RESPONSE  
MAX1589A toc09  
MAX1589A toc10  
2.5V  
1.8V  
4V  
V
IN  
V
500mV/div  
IN  
500mV/div  
3.5V  
V
V
1.5V  
OUT  
1.5V  
OUT  
I
= 100mA  
= 1.5V  
I
= 100mA  
= 1.5V  
LOAD  
LOAD  
10mV/div  
AC-COUPLED  
10mV/div  
AC-COUPLED  
V
V
OUT  
OUT  
40 s/div  
40 s/div  
LOAD-TRANSIENT RESPONSE  
LOAD-TRANSIENT RESPONSE  
MAX1589A toc12  
MAX1589A toc11  
200mA  
500mA  
OUT  
100mA  
200mA/div  
I
I
OUT  
500mA/div  
20mA  
20mV/div  
AC-COUPLED  
50mV/div  
AC-COUPLED  
0
V
V
OUT  
OUT  
20 s/div  
20 s/div  
V
V
= 3.6V  
OUT  
V
V
= 1.8V  
OUT  
IN  
IN  
= 1.5V  
= 1.5V  
4
_______________________________________________________________________________________  
Low-Input-Voltage, 500mA LDO Regulator  
RESET  
with  
in SOT and TDFN  
Typical Operating Characteristics (continued)  
(V = (V  
IN  
+ 0.5V) or 1.8V, whichever is greater; SHDN = IN, C = 1µF, C  
= 4.7µF, T = +25°C, unless otherwise noted.)  
OUT  
IN  
OUT  
A
SHUTDOWN RESPONSE  
SHUTDOWN/RESET RESPONSE  
MAX1589A toc13  
MAX1589A toc14  
R = 25  
OUT  
R = 25  
L
OUT  
L
V
= 1.5V  
V
= 1.5V  
1V/div  
1V/div  
V
V
SHDN  
SHDN  
0
0
0
0
0
V
OUT  
1V/div  
1V/div  
V
OUT  
V
RESET  
500mV/div  
100 s/div  
40ms/div  
LINE/RESET RESPONSE  
MAX1589A toc15  
R = 25  
OUT  
L
V
= 1.5V  
2V/div  
1V/div  
1V/div  
V
IN  
0
0
0
V
OUT  
V
RESET  
200ms/div  
_______________________________________________________________________________________  
5
Low-Input-Voltage, 500mA LDO Regulator  
RESET  
with  
in SOT and TDFN  
Pin Description  
PIN  
NAME  
FUNCTION  
SOT23  
TDFN  
Regulator Input. Supply voltage can range from +1.62V to +3.6V. Bypass IN with at least a  
1µF ceramic capacitor to GND (see the Capacitor Selection and Regulator Stability  
section).  
1
6
IN  
Ground. GND also functions as a heatsink. Solder GND to a large pad or circuit-board  
ground plane to maximize SOT23 power dissipation.  
2
3
4
GND  
GND  
Ground  
Active-Low Shutdown Input. A logic-low reduces supply current to below 1µA. Connect to  
IN or logic-high for normal operation.  
5
SHDN  
Active-Low, Open-Drain Reset Output. RESET rises 100ms after the output has achieved  
4
3
RESET  
regulation. RESET falls immediately if V  
drops below 82.5% of its nominal voltage, or if  
OUT  
the MAX1589A is shut down.  
5
6
2
1
I.C.  
Internally Connected. Leave floating or connect to GND.  
Regulator Output. Sources up to 500mA. Bypass with a 4.7µF low-ESR ceramic capacitor  
to GND.  
OUT  
Exposed  
Pad  
Ground. EP also functions as a heatsink. Solder EP to a large pad or circuit-board ground  
plane to maximize TDFN power dissipation.  
EP  
MAX1589A does not suffer from these problems and  
consumes only 90µA (typ) of quiescent current under  
heavy loads, as well as in dropout.  
Detailed Description  
The MAX1589A is a low-dropout, low-quiescent-current,  
high-accuracy linear regulator designed primarily for  
battery-powered applications. The device supplies  
loads up to 500mA and is available with preset output  
voltages from +0.75V to +3.0V. As illustrated in Figure 1,  
the MAX1589A contains a reference, an error amplifier,  
a p-channel pass transistor, an internal feedback volt-  
age-divider, and a power-good comparator.  
Shutdown  
Pull SHDN low to enter shutdown. During shutdown, the  
output is disconnected from the input, an internal 1.5k  
resistor pulls OUT to GND, RESET is actively pulled  
low, and supply current drops below 1µA.  
RESET  
Output  
The error amplifier compares the reference with the  
feedback voltage and amplifies the difference. If the  
feedback voltage is lower than the reference voltage,  
the pass-transistor gate is pulled lower, allowing more  
current to pass to the output and increasing the output  
voltage. If the feedback voltage is too high, the pass-  
transistor gate is pulled up, allowing less current to  
pass to the output.  
The MAX1589As microprocessor (µP) supervisory cir-  
cuitry asserts a guaranteed logic-low reset during  
power-up, power-down, and brownout conditions down  
to +1V. RESET asserts when V  
is below the reset  
OUT  
threshold and remains asserted for at least 70ms (t  
)
RP  
after V  
rises above the reset threshold.  
OUT  
Current Limit  
The MAX1589A monitors and controls the pass transis-  
Internal p-Channel Pass Transistor  
tors gate voltage, limiting the output current to 850mA  
The MAX1589A features a 0.33 (R  
) p-channel  
DS(ON)  
(typ). If the output current exceeds I , the MAX1589A  
LIM  
MOSFET pass transistor. Unlike similar designs using  
pnp pass transistors, p-channel MOSFETs require no  
base drive, which reduces quiescent current. pnp-  
based regulators also waste considerable current in  
dropout when the pass transistor saturates and use  
high base-drive currents under large loads. The  
output voltage drops.  
Thermal-Overload Protection  
Thermal-overload protection limits total power dissipa-  
tion in the MAX1589A. When the junction temperature  
exceeds +165°C, a thermal sensor turns off the pass  
6
_______________________________________________________________________________________  
Low-Input-Voltage, 500mA LDO Regulator  
RESET  
with  
in SOT and TDFN  
IN  
SHDN  
MOS DRIVER  
P
ERROR  
AMP  
SHUTDOWN  
LOGIC  
WITH I  
LIMIT  
OUT  
MAX1589A  
POWER-GOOD  
COMPARATOR  
RESET  
82.5%  
REF  
THERMAL  
SENSOR  
REF  
100ms  
TIMER  
GND  
Figure 1. Functional Diagram  
transistor, allowing the IC to cool. The thermal sensor  
turns the pass transistor on again after the junction tem-  
perature cools by 15°C, resulting in a pulsed output  
during continuous thermal-overload conditions. Thermal-  
overload protection safeguards the MAX1589A in the  
event of fault conditions. For continuous operation, do not  
exceed the absolute maximum junction-temperature  
rating of +150°C.  
41°C/W for the 3mm x 3mm TDFN package, and  
110°C/W for the 6-pin thin SOT23 package. For best  
heatsinking, expand the copper connected to GND, or  
the exposed paddle.  
The MAX1589A delivers up to 500mA and operates  
with an input voltage up to +3.6V. However, when using  
the 6-pin SOT23 version, high output currents can only  
be sustained when the input-output differential voltage  
is low, as shown in Figure 2.  
Operating Region and Power Dissipation  
The MAX1589As maximum power dissipation depends  
on the thermal resistance of the IC package and circuit  
board, the temperature difference between the die  
junction and ambient air, and the rate of airflow. The  
The maximum allowed power dissipation for the 6-pin  
TDFN is 1.951W at T = +70°C. Figure 3 shows that the  
A
maximum input-output differential voltage is not limited  
by the TDFN package power rating.  
power dissipated in the device is P = I  
OUT  
(V  
-
IN  
OUT  
Applications Information  
V
). The maximum allowed power dissipation is:  
Capacitor Selection and  
Regulator Stability  
P
= (T  
- T ) / (  
+
)
CA  
MAX  
J(MAX)  
A
JC  
Capacitors are required at the MAX1589As input and  
output for stable operation over the full temperature  
range and with load currents up to 500mA. Connect a  
1µF ceramic capacitor between IN and GND and a  
4.7µF low-ESR ceramic capacitor between OUT and  
where T  
- T is the temperature difference between  
A
J(MAX)  
the MAX1589A die junction and the surrounding air,  
JC  
is the thermal resistance of the junction to the case, and  
is the thermal resistance from the case through the  
CA  
PC board, copper traces, and other materials to the sur-  
rounding air. Typical thermal resistance ( ) for a  
device mounted to a 1in square, 1oz copper pad is  
GND. The input capacitor (C ) lowers the source  
IN  
+
JC  
JA  
impedance of the input supply. Use larger output  
_______________________________________________________________________________________  
7
Low-Input-Voltage, 500mA LDO Regulator  
RESET  
with  
in SOT and TDFN  
MAXIMUM OUTPUT CURRENT  
MAXIMUM OUTPUT CURRENT  
vs. INPUT VOLTAGE  
vs. INPUT VOLTAGE  
(POWER DISSIPATION LIMIT)  
(POWER DISSIPATION LIMIT)  
600  
500  
400  
300  
200  
100  
0
600  
500  
400  
300  
200  
100  
0
T
T
= +85 C  
= +70 C  
T = +85 C  
A
A
A
MAXIMUM RECOMMENDED  
OUTPUT CURRENT 6-PIN SOT23  
MAXIMUM RECOMMENDED  
OUTPUT CURRENT 6-PIN TDFN  
0
0.5  
1.0  
1.5  
2.0  
2.5  
3.0  
0
0.5  
1.0  
1.5  
2.0  
2.5  
3.0  
(V - V ) (V)  
(V - V ) (V)  
IN  
OUT  
IN  
OUT  
Figure 2. Power Operating Regions for 6-Pin SOT23: Maximum  
Output Current vs. Input Voltage  
Figure 3. Power Operating Region for 6-Pin TDFN: Maximum  
Output Current vs. Input Voltage  
capacitors to reduce noise and improve load-transient  
response, stability, and power-supply rejection.  
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 capacitors value  
and decreasing the ESR attenuates the overshoot.  
The output capacitors equivalent series resistance  
(ESR) affects stability and output noise. Use output  
capacitors with an ESR of 30m or less to ensure sta-  
bility and optimize transient response. Surface-mount  
ceramic capacitors have very low ESR and are com-  
Input-Output (Dropout) Voltage  
A regulators 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-  
monly available in values up to 10µF. Connect C and  
IN  
C
as close to the MAX1589A as possible to mini-  
OUT  
mize the impact of PC board trace inductance.  
Noise, PSRR, and Transient Response  
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.  
tance (R  
= 0.33 ) multiplied by the load current  
DS(ON)  
(see the Typical Operating Characteristics):  
= V - V = 0.33 I  
OUT  
V
DROPOUT  
IN  
OUT  
The MAX1589A ground current reduces to 70µA in  
dropout.  
Chip Information  
TRANSISTOR COUNT: 2556  
The MAX1589A load-transient response (see the  
Typical Operating Characteristics) shows two compo-  
PROCESS: BiCMOS  
8
_______________________________________________________________________________________  
Low-Input-Voltage, 500mA LDO Regulator  
RESET  
with  
in SOT and TDFN  
Package Information  
(The package drawing(s) in this data sheet may not reflect the most current specifications. For the latest package outline information,  
go to www.maxim-ic.com/packages.)  
_______________________________________________________________________________________  
9
Low-Input-Voltage, 500mA LDO Regulator  
RESET  
with  
in SOT and TDFN  
Package Information (continued)  
(The package drawing(s) in this data sheet may not reflect the most current specifications. For the latest package outline information,  
go to www.maxim-ic.com/packages.)  
10 ______________________________________________________________________________________  
Low-Input-Voltage, 500mA LDO Regulator  
RESET  
with  
in SOT and TDFN  
Package Information (continued)  
(The package drawing(s) in this data sheet may not reflect the most current specifications. For the latest package outline information,  
go to www.maxim-ic.com/packages.)  
D2  
D
A2  
PIN 1 ID  
N
0.35x0.35  
b
[(N/2)-1] x e  
REF.  
PIN 1  
INDEX  
AREA  
E
E2  
DETAIL A  
e
A1  
k
C
C
L
L
A
L
L
e
e
PACKAGE OUTLINE, 6,8,10 & 14L,  
TDFN, EXPOSED PAD, 3x3x0.80 mm  
1
-DRAWING NOT TO SCALE-  
21-0137  
G
2
______________________________________________________________________________________ 11  
Low-Input-Voltage, 500mA LDO Regulator  
RESET  
with  
in SOT and TDFN  
Package Information (continued)  
(The package drawing(s) in this data sheet may not reflect the most current specifications. For the latest package outline information,  
go to www.maxim-ic.com/packages.)  
COMMON DIMENSIONS  
SYMBOL  
MIN.  
0.70  
2.90  
2.90  
0.00  
0.20  
MAX.  
0.80  
3.10  
3.10  
0.05  
0.40  
A
D
E
A1  
L
k
0.25 MIN.  
0.20 REF.  
A2  
PACKAGE VARIATIONS  
DOWNBONDS  
ALLOWED  
PKG. CODE  
T633-1  
N
6
D2  
E2  
e
JEDEC SPEC  
MO229 / WEEA  
MO229 / WEEA  
MO229 / WEEC  
MO229 / WEEC  
MO229 / WEEC  
b
[(N/2)-1] x e  
1.90 REF  
1.90 REF  
1.95 REF  
1.95 REF  
1.95 REF  
2.00 REF  
2.40 REF  
2.40 REF  
1.500.10 2.300.10 0.95 BSC  
1.500.10 2.300.10 0.95 BSC  
1.500.10 2.300.10 0.65 BSC  
1.500.10 2.300.10 0.65 BSC  
1.500.10 2.300.10 0.65 BSC  
0.400.05  
0.400.05  
0.300.05  
0.300.05  
0.300.05  
NO  
NO  
T633-2  
6
T833-1  
8
NO  
T833-2  
8
NO  
T833-3  
8
YES  
NO  
T1033-1  
T1433-1  
T1433-2  
10  
14  
14  
1.500.10 2.300.10 0.50 BSC MO229 / WEED-3 0.250.05  
1.700.10 2.300.10 0.40 BSC  
1.700.10 2.300.10 0.40 BSC  
- - - -  
- - - -  
0.200.05  
0.200.05  
YES  
NO  
PACKAGE OUTLINE, 6,8,10 & 14L,  
TDFN, EXPOSED PAD, 3x3x0.80 mm  
2
-DRAWING NOT TO SCALE-  
21-0137  
G
2
Maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim product. No circuit patent licenses are  
implied. Maxim reserves the right to change the circuitry and specifications without notice at any time.  
12 ____________________Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600  
© 2005 Maxim Integrated Products  
Printed USA  
is a registered trademark of Maxim Integrated Products, Inc.  

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