Rainbow Electronics MAX15030 User Manual
General Description
The MAX15029/MAX15030 low-dropout linear regulators operate from input voltages as low as 1.425V and
deliver up to 500mA of continuous output current with a
typical dropout voltage of only 40mV. The output voltage is adjustable from 0.5V to VINand is ±2% accurate
over load and line variations, from -40°C to +125°C.
The MAX15030 features a BIAS input of 3V to 5.5V from
an always-on power supply. The BIAS input current is
reduced down to less than 2µA during the shutdown.
These regulators use small, 1µF ceramic input capacitors and 2.2µF ceramic output capacitors to deliver
500mA output current. High bandwidth provides excellent transient response and limits the output voltage deviation to 10mV for a 100mA to 500mA load step, with only
a 2.2µF ceramic output capacitor, and the voltage deviations can be reduced further by increasing the output
capacitor.
These devices offer a logic-controlled shutdown input
to reduce input current (I
IN
) consumption down to less
than 5.5µA in standby mode. Other features include a
soft-start to reduce inrush current, short-circuit protection, and thermal-overload protection.
The MAX15030 features a BIAS input allowing a secondary supply to keep the LDO’s internal circuitry alive
if the voltage on IN goes to 0. Both devices are fully
specified from -40°C to +125°C and are available in a
10-pin thermally enhanced TDFN package (3mm x
3mm) that includes an exposed pad for optimal power
dissipation. For a 1A version of these LDOs, refer to the
MAX15027/MAX15028 data sheet.
Applications
Automotive (Dead-Man LDO)
Servers
Storage
Networking
Base Stations
Optical Modules
ATE
Features
o 1.425V to 3.6V Input Voltage Range
o Output Voltage Programmable from 0.5V to V
IN
o Guaranteed Maximum 150mV Dropout at 500mA
Output Current
o 2% Output Accuracy Over Load, Line, and
Temperature
o Stable with Ceramic Capacitors
o Fast Transient Response
o 60µA Operating Bias Supply Current
o 1.2µA Shutdown Bias Supply Current
o Short-Circuit and Thermal Protection
o -40°C to +125°C Operating Temperature Range
o Soft-Start Limits Inrush Current
o Thermally Enhanced 3mm x 3mm TDFN Package
MAX15029/MAX15030
1.425V to 3.6V Input, 500mA Low-Dropout
Regulators with BIAS Input
________________________________________________________________
Maxim Integrated Products
1
Pin Configurations
Ordering Information
19-4586; Rev 0; 4/09
For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642,
or visit Maxim’s website at www.maxim-ic.com.
Pin Configurations continued at end of data sheet.
PART
TEMP RANGE
PIN-
TOP
MARK
MAX15029ATB+
+AUF
MAX15030ATB+
+AUG
+
Denotes a lead(Pb)-free/RoHS-compliant package.
For tape-and-reel orders, add a “T” after the “+.”
*
EP = Exposed pad.
Typical Operating Circuits appear at end of data sheet.
PACKAGE
- 40°C to + 125°C 10 TDFN-EP*
- 40°C to + 125°C 10 TDFN-EP*
TOP VIEW
+
IN
1
29
IN
3
I.C.
4
56
MAX15029
TDFN
(3mm x 3mm)
OUT
10
OUTIN
GND
8
FB
7
SSEN
MAX15029/MAX15030
1.425V to 3.6V Input, 500mA Low-Dropout
Regulators with BIAS Input
2 _______________________________________________________________________________________
ABSOLUTE MAXIMUM RATINGS
ELECTRICAL CHARACTERISTICS
(Circuit of Figure 1; VIN= 1.8V, V
OUT
= 1.2V, EN = IN for MAX15029, EN = BIAS for MAX15030, I
OUT
= 100mA, T
A
=
T
J
= -40°C to
+125°C. Typical values are at T
A
= +25°C, unless otherwise noted.) (Note 2)
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.
IN, FB, SS, I.C. to GND..........................................-0.3V to +4.0V
BIAS to GND.............................................................-0.3V to +6V
EN to GND ................-0.3V to the lower of (V
BIAS
+ 0.3V) or +6V
OUT to GND ................................................-0.3V to (V
IN
+ 0.3V)
Output Short-Circuit Duration.....................................Continuous
Continuous Power Dissipation (T
A
= +70°C)
10-Pin TDFN, Multilayer Board
(derate 24.4mW/°C above +70°C)..............................1951mW
Junction-to-Case Thermal Resistance, θ
JC
(Note 1)..........9°C/W
Junction-to-Ambient Thermal Resistance, θ
JA
(Note 1)...41°C/W
Operating Junction Temperature Range...........-40°C to +125°C
Maximum Junction Temperature .....................................+150°C
Storage Temperature Range .............................-65°C to +150°C
Lead Temperature (soldering, 10s) .................................+300°C
Note 1: Package thermal resistances were obtained using the method described in JEDEC specification JESD51-7, using a four-
layer board. For detailed information on package thermal considerations, refer to www.maxim-ic.com/thermal-tutorial
.
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
IN
Input Voltage Range V
Undervoltage Lockout V
Undervoltage Lockout Hysteresis V
Quiescent GND Current I
Input Supply Current in Shutdown I
BIAS (MAX15030)
Input Voltage Range V
Undervoltage Lockout V
Undervoltage Lockout Hysteresis I
Quiescent Input Supply Current I
Input Supply Current in Shutdown I
MAX15029 1.425 3.600
V
IN
UVLO
UVLO_HYSTIOUT
MAX15030
VIN rising
VIN = 1.425V to 3.6V, V
I
GND
OUT
VIN = 3.6V, V
VIN = 3.3V, V
IN_SD
BIAS
BIAS_UVLOVBIAS
BIAS
BIAS_SD
VEN = 0 (TA = -40°C to 85°C) 0.1 5.5 µA
OUT
VEN = V
EN = GND
= 2mA 50 mV
= 1mA, V
BIAS
OUT
OUT
= 3.3V, I
= 3.3V, I
rising 2.3 2.5 2.7 V
= 2mA 110 mV
BIAS
= 3V to 5.5V 1.425 3.600
BIAS
BIAS = IN 3.000 3.600
MAX15029 1.275 1.325 1.375
MAX15030 1.04 1.09 1.14
= 1.2V,
OUT
= 3.3V
= 100mA 180 325 560
OUT
= 500mA 170 315 470
OUT
VIN = 0, V
V
BIAS
V
I N
V
B I AS
V
I N
V
B I AS
OUT
= 3.3V
= 3.3V , V
= 3.3V
= 3.3V , V
= 5V
= 0,
OU T
OU T
= 0,
= 0,
160 275 410
3 5.5 V
20 60 120 µA
1.2 2
1.2 2
1.5 3
V
V
µA
µA
MAX15029/MAX15030
1.425V to 3.6V Input, 500mA Low-Dropout
Regulators with BIAS Input
_______________________________________________________________________________________ 3
ELECTRICAL CHARACTERISTICS (continued)
(Circuit of Figure 1; VIN= 1.8V, V
OUT
= 1.2V, EN = IN for MAX15029, EN = BIAS for MAX15030, I
OUT
= 100mA, T
A
=
T
J
= -40°C to
+125°C. Typical values are at T
A
= +25°C, unless otherwise noted.) (Note 2)
Note 2: All devices are production tested at T
A
= +25°C. Limits over the operating temperature range are guaranteed by design
and characterization.
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
OUT
Output Voltage Range V
Load Regulation I
Line Regulation
Dropout Voltage (VIN - V
(Note 3)
Output Current Limit I
FB
Threshold Accuracy V
Input Current I
EN/SOFT-START
Enable Input Threshold
(MAX15030)
Enable Input Threshold
(MAX15029)
Soft-Start Charging Current I
Soft-Start Reference Voltage V
THERMAL SHUTDOWN
Thermal Shutdown Threshold TJ rising 165 °C
Thermal Shutdown Hysteresis 15 °C
OUT
)
OUT
= 1mA to 500mA 0.01 mV/mA
OUT
V
V
LIM
V
V
V
V
DO
FB
FB
IH
IL
IH
IL
SS
SS
= 1.425V to 3.6V, V
IN
= 1mA
I
OUT
I
= 500mA, V
OUT
VFB = 300mV 0.7 0.85 1.0 A
= 1.125V to 3.3V, V
V
OUT
0.3V) to 3.6V, I
VFB = 0.488V 0.1 0.2 µA
V
= 5V
BIAS
VIN = 1.8V
OUT
= 1mA to 500mA
OUT
= 1.2V,
OUT
= 1.2V, V
= (V
IN
IN
0.5 3.3 V
4mV
= 1.5V 40 150 mV
+
OUT
0.489 0.499 0.509 V
1.05
1.05
5µA
0.499 V
0.4
0.4
V
V
Loading...