19-2733; Rev 1; 2/12
KIT
ATION
EVALU
BLE
AVAILA
Low-Noise, Low-Dropout,
200mA Linear Regulator in UCSP
General Description
Features
♦
Guaranteed 200mA Output Current
♦
Low 100mV (typ) Dropout at 100mA
♦
Low 40µV
RMS
Output Noise
♦
Low 80µA Operating Supply Current
♦
62dB PSRR
♦
< 1µA Shutdown Current
♦
Thermal-Overload and Short-Circuit Protection
♦
Output Current Limit
♦
Tiny 1.16mm x 1.57mm x 0.66mm UCSP
(3 x 2 Grid)
MAX8532
The MAX8532 offers the benefits of low-dropout voltage
and ultra-low power regulation in a subminiaturized
UCSP, making it ideal for space-restricted portable
equipment. The device operates from a 2.5V to 6.5V
input and delivers up to 200mA, with low dropout of
100mV (typ) at 100mA. Designed with an internal
P-channel MOSFET pass transistor, the supply current
is kept at a low 80µA, independent of the load current
and dropout voltage. Other features include short-circuit
protection and thermal-shutdown protection.
The MAX8532 includes a reference bypass pin for low
output noise (40µV
RMS
) and a logic-controlled shutdown
input. The device is available in a tiny 6-pin UCSP.
Ordering Information
Applications
Cellular and Cordless Phones
PDAs and Palmtop Computers
Notebook Computers
Digital Cameras
PCMCIA Cards
Wireless LAN Cards
Hand-Held Instruments
PART
MAX8532EBT_*
TEMP RANGE
-40°C to +85°C
OUT
VOLTAGE
1.5V to 3.3V
PIN-
PACKAGE
6 UCSP
*“_”
= Output voltage code (see the Output Voltage Selector
Guide).
Note:
Devices are also available in a lead(Pb)-free/RoHS-com-
pliant package. Specify lead-free by adding “+” to the part num-
ber when ordering.
Output Voltage Selector Guide
PART
MAX8532EBTJ
MAX8532EBTG
V
OUT
(V)
2.85
3
TOP MARK
ACP
ACU
MAX8532EBT2
1.8
ACV
Note:
Contact the factory for other output voltages between
1.5V and 3.3V. The minimum order quantity is 25,000 units.
Typical Operating Circuit
TOP VIEW
INPUT
2.5V TO 6.5V
C
IN
2.2µF
IN
OUT
OUTPUT
1.5V TO 3.3V
AT 200mA
2.2µF
A1
GND
Bump Configuration
SHDN
A2
BP
A3
MAX8532
B1
SHDN
GND
BP
10nF
OUT
MAX8532EBT
B2
IN
B3
N.C.
ON
OFF
UCSP
________________________________________________________________
Maxim Integrated Products
1
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.
Low-Noise, Low-Dropout,
200mA Linear Regulator in UCSP
MAX8532
ABSOLUTE MAXIMUM RATINGS
IN,
SHDN,
BP to GND ..............................................-0.3V to +7V
OUT to GND ................................................-0.3V to (VIN + 0.3V)
Output Short-Circuit Duration ........................................Indefinite
Continuous Power Dissipation (TA = +70°C)
6-Pin UCSP (derate 3.9mW/°C above +70°C) ..............308mW
Operating Temperature Range ...........................-40°C to +85°C
Junction Temperature ......................................................+150°C
Storage Temperature Range .............................-65°C to +150°C
6-Pin UCSP Solder Profile ............................................(Note 1)
Soldering Temperature (reflow)
Lead(Pb)-Free Packages..............................................+260°C
Packages Containing Lead(Pb)....................................+240°C
Note 1:
For UCSP solder profile information, visit www.maxim-ic.com/1st_pages/UCSP.html.
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
(IN = 3.8V,
SHDN
= IN, C
BP
= 10nF, T
A
=
-40°C to +85°C,
unless otherwise noted. Typical values are at T
A
= +25°C.) (Note 2)
PARAMETER
Input Voltage
Undervoltage Lockout Threshold
Output Voltage Accuracy
Maximum Output Current
Current Limit
Ground Current
Dropout Voltage
Line Regulation
Output Voltage Noise
Ripple Rejection
SHUTDOWN
SHDN
Supply Current
SHDN
Input Threshold
SHDN
Input Bias Current
THERMAL PROTECTION
Thermal-Shutdown Temperature
Thermal-Shutdown Hysteresis
T
SHDN
∆T
SHDN
T
J
rising
160
10
°C
°C
I
OFF
V
IH
V
IL
I
SHDN
SHDN
= 0, T
A
= +25°C
SHDN
= 0, T
A
= +85°C
Input high voltage
Input low voltage
SHDN
= IN or GND
T
A
= +25°C
T
A
= +85°C
0.7
0.8
1.6
0.4
100
0.01
0.1
1
µA
V
nA
PSRR
I
OUT
I
LIM
I
Q
V
OUT
- V
IN
∆V
LNR
No load
I
OUT
= 100mA
I
OUT
= 100mA (Note 3)
IN = (V
OUT
+ 0.1V) to 3.8V
10Hz to 100kHz, C
OUT
= 10µF, I
OUT
= 10mA
100Hz, I
OUT
= 30mA
-0.2
40
62
SYMBOL
V
IN
V
UVLO
IN rising, hysteresis is 40mV (typ)
T
A
= +25°C, I
OUT
= 1mA
T
A
= -40°C to +85°C, I
OUT
= 1mA
T
A
= -40°C to +85°C, I
OUT
= 0.1mA to 200mA
CONDITIONS
MIN
2.5
2.15
-1
-2
-3
200
210
330
80
100
100
200
+0.2
550
150
2.25
TYP
MAX
6.5
2.42
+1
+2
+3
mA
mA
µA
mV
%/V
µV
RMS
dB
%
UNITS
V
V
Note 2:
All units are 100% production tested at T
A
= +25°C. Limits over the operating temperature range are guaranteed by design.
Note 3:
The dropout voltage is defined as V
IN
- V
OUT
, when V
OUT
is 100mV below the value of V
OUT
for V
IN
= V
OUT
+ 0.5V.
Specification applies only when V
OUT
> = 2.5V.
2
_______________________________________________________________________________________
Low-Noise, Low-Dropout,
200mA Linear Regulator in UCSP
Typical Operating Characteristics
(V
OUT
= 2.85V, load = 80mA, V
IN
= 3.8V, C
OUT
= 2.2µF, C
BP
= 0.01µF, and C
IN
= 2.2µF. T
A
= +25°C, unless otherwise noted.)
SUPPLY CURRENT
vs. SUPPLY VOLTAGE
MAX8532 toc01
MAX8532
SUPPLY CURRENT
vs. LOAD CURRENT
MAX8532 toc02
SUPPLY CURRENT
vs. TEMPERATURE
MAX8532 toc03
140
120
SUPPLY CURRENT (µA)
100
80
60
40
20
0
140
120
SUPPLY CURRENT (µA)
100
80
60
40
20
0
140
120
SUPPLY CURRENT (µA)
80mA LOAD
100
80
60
40
20
0
0
1
2
3
4
5
6
SUPPLY VOLTAGE (V)
NO LOAD
0
10
20
30
40
50
60
70
80
-40
-15
10
35
60
85
LOAD CURRENT (mA)
TEMPERATURE (°C)
DROPOUT VOLTAGE
vs. LOAD CURRENT
MAX8532 toc04
LDO DROPOUT VOLTAGE
vs. V
OUT
MAX8532 toc05
OUTPUT VOLTAGE ACCURACY
vs. TEMPERATURE
MAX8532 toc06
250
120
100
DROPOUT VOLTAGE (mV)
80
60
40
20
0
0.6
0.4
OUTPUT VOLTAGE (%)
0.2
0
-0.2
-0.4
-0.6
DROPOUT VOLTAGE (mV)
200
150
I
OUT
= 80mA
100
50
0
0
20 40 60 80 100 120 140 160 180 200
LOAD CURRENT (mA)
2.5
2.6
2.7
2.8
2.9
V
OUT
(V)
3.0
3.1
3.2
3.3
-40
-15
10
35
60
85
TEMPERATURE (°C)
PSRR vs. FREQUENCY
MAX8532 toc07
OUTPUT NOISE SPECTRAL DENSITY
vs. FREQUENCY
MAX8532 toc08
OUTPUT NOISE (10Hz TO 100kHz)
MAX8532 toc09
70
100Ω LOAD
60
50
PSRR (dB)
40
30
20
10
0
0.01
0.1
1
10
100
10000
NOISE DENSITY (nV
RMS
/√Hz)
1000
V
OUT
100
500µV/div
10
1000
0.01
0.1
1
FREQUENCY (kHz)
10
100
1ms/div
FREQUENCY (kHz)
_______________________________________________________________________________________
3
Low-Noise, Low-Dropout,
200mA Linear Regulator in UCSP
MAX8532
Typical Operating Characteristics (continued)
(V
OUT
= 2.85V, load = 80mA, V
IN
= 3.8V, C
OUT
= 2.2µF, C
BP
= 0.01µF, and C
IN
= 2.2µF. T
A
= +25°C, unless otherwise noted.)
LOAD TRANSIENT
V
IN
= 3.35V, I
LOAD
= 1mA TO 80mA
4.5V
3.5V
1V/div
V
OUT
20mV/div
AC-COUPLED
LINE TRANSIENT
V
IN
MAX8532 toc10
MAX8532 toc11
V
OUT
20mV/div
AC-COUPLED
50mA/div
I
LOAD
0
40µs/div
10µs/div
LOAD TRANSIENT
NEAR DROPOUT
MAX8532 toc12
SHUTDOWN RESPONSE
MAX8532 toc13
V
OUT
20mV/div
AC-COUPLED
V
OUT
2V/div
0
V
IN
= V
OUT
+ 0.1V
50mA/div
I
LOAD
0
V
SHDN
1V/div
0
10µs/div
1ms/div
Bump Description
PIN
B3
B2
B1
A1
A2
A3
NAME
N.C.
IN
OUT
GND
SHDN
BP
Not Connected
Regulator Input
Regulator Output. Guaranteed 200mA output current.
Ground
Shutdown Input. A logic low shuts down the regulator. Connect to IN for normal operation.
Reference Noise Bypass. Bypass with a 0.01µF ceramic capacitor for reduced noise.
FUNCTION
4
_______________________________________________________________________________________
Low-Noise, Low-Dropout,
200mA Linear Regulator in UCSP
Functional Diagram
MAX8532
IN
SHDN
SHUTDOWN
AND
POWER-ON
CONTROL
ERROR
AMP
MOS
DRIVER
WITH I
LIMIT
OUT
MAX8532
THERMAL
SENSOR
1.25V
REF
GND
BP
Detailed Description
The MAX8532 is a low-power, low-dropout, low-quies-
cent current linear regulator designed primarily for bat-
tery-powered applications. For preset output voltages,
see the
Output Voltage Selector Guide.
The device
supplies up to 200mA for OUT. The MAX8532 consists
of a 1.25V reference, error amplifier, P-channel pass
transistor, reference bypass block, and internal feed-
back voltage divider.
The 1.25V bandgap reference is connected to the error
amplifier’s inverting input. The error amplifier compares
this 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
high, the pass-transistor gate is pulled up, allowing less
current to pass to the output. The output voltage is fed
back through an internal resistor voltage-divider con-
nected to the OUT pin.
Shutdown
The MAX8532 has a single shutdown control input
(SHDN). Drive
SHDN
low to shut down the output,
reducing supply current to 10nA. Connect
SHDN
to a
logic-high, or IN, for normal operation.
Internal P-Channel Pass Transistor
The MAX8532 features a 1Ω P-channel MOSFET pass
transistor. A P-channel MOSFET provides several advan-
tages over similar designs using PNP pass transistors,
including longer battery life. It requires no base drive,
reducing quiescent current. PNP-based regulators waste
considerable current in dropout when the pass transistor
saturates and also use high base-drive currents under
heavy loads. The MAX8532 does not suffer these prob-
lems and consumes only 90µA quiecent current whether
in dropout, light-load, or heavy-load applications (see the
Typical Operating Characteristics).
Whereas a PNP-
based regulator has dropout voltage independent of the
load, a P-channel MOSFET’s dropout voltage is propor-
tional to load current, providing for low dropout voltage
at heavy loads and extremely low dropout voltage at
lighter loads.
5
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