MAXIM MAX8532EBTJ

19-2733; Rev 1; 2/12
KIT
ATION
EVALU
LE
B
A
IL
A
AV
Low-Noise, Low-Dropout,
200mA Linear Regulator in UCSP
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 (40µVRMS) and a logic-controlled shutdown
input. The device is available in a tiny 6-pin UCSP.
Features
♦ Guaranteed 200mA Output Current
♦ Low 100mV (typ) Dropout at 100mA
♦ Low 40µVRMS 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)
Ordering Information
Applications
Cellular and Cordless Phones
PART
TEMP RANGE
OUT
VOLTAGE
PINPACKAGE
-40°C to +85°C
1.5V to 3.3V
6 UCSP
PDAs and Palmtop Computers
MAX8532EBT_*
Notebook Computers
*“_” = Output voltage code (see the Output Voltage Selector
Guide).
Note: Devices are also available in a lead(Pb)-free/RoHS-compliant package. Specify lead-free by adding “+” to the part number when ordering.
Digital Cameras
PCMCIA Cards
Wireless LAN Cards
Output Voltage Selector Guide
Hand-Held Instruments
PART
VOUT (V)
TOP MARK
MAX8532EBTJ
2.85
ACP
MAX8532EBTG
3
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.
Bump Configuration
Typical Operating Circuit
TOP VIEW
INPUT
2.5V TO 6.5V
CIN
2.2µF
IN
OUT
OUTPUT
1.5V TO 3.3V
AT 200mA
GND
SHDN
BP
A1
A2
A3
2.2µF
MAX8532
ON
SHDN
MAX8532EBT
B1
B2
B3
OUT
IN
N.C.
BP
OFF
10nF
GND
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.
MAX8532
General Description
MAX8532
Low-Noise, Low-Dropout,
200mA Linear Regulator in UCSP
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, CBP = 10nF, TA = -40°C to +85°C, unless otherwise noted. Typical values are at TA = +25°C.) (Note 2)
PARAMETER
Input Voltage
Undervoltage Lockout Threshold
SYMBOL
CONDITIONS
MIN
VIN
VUVLO
Output Voltage Accuracy
IN rising, hysteresis is 40mV (typ)
2.15
+2
TA = -40°C to +85°C, IOUT = 0.1mA to 200mA
-3
+3
200
210
VOUT - VIN
Line Regulation
∆VLNR
Output Voltage Noise
Ripple Rejection
PSRR
V
-2
ILIM
Dropout Voltage
V
2.42
-1
IOUT
+1
%
mA
330
550
No load
80
150
IOUT = 100mA
100
IOUT = 100mA (Note 3)
100
IN = (VOUT + 0.1V) to 3.8V
UNITS
6.5
TA = -40°C to +85°C, IOUT = 1mA
Current Limit
IQ
2.25
MAX
TA = +25°C, IOUT = 1mA
Maximum Output Current
Ground Current
TYP
2.5
-0.2
200
+0.2
mA
µA
mV
%/V
10Hz to 100kHz, COUT = 10µF, IOUT = 10mA
40
µVRMS
100Hz, IOUT = 30mA
62
dB
SHUTDOWN
SHDN Supply Current
SHDN Input Threshold
SHDN Input Bias Current
IOFF
SHDN = 0, TA = +25°C
0.01
SHDN = 0, TA = +85°C
0.1
VIH
Input high voltage
VIL
Input low voltage
ISHDN
SHDN = IN or GND
TSHDN
TJ rising
1
1.6
0.4
TA = +25°C
0.7
TA = +85°C
0.8
100
µA
V
nA
THERMAL PROTECTION
Thermal-Shutdown Temperature
Thermal-Shutdown Hysteresis
∆TSHDN
160
°C
10
°C
Note 2: All units are 100% production tested at TA = +25°C. Limits over the operating temperature range are guaranteed by design.
Note 3: The dropout voltage is defined as VIN - VOUT, when VOUT is 100mV below the value of VOUT for VIN = VOUT + 0.5V.
Specification applies only when VOUT > = 2.5V.
2
_______________________________________________________________________________________
Low-Noise, Low-Dropout,
200mA Linear Regulator in UCSP
(VOUT = 2.85V, load = 80mA, VIN = 3.8V, COUT = 2.2µF, CBP = 0.01µF, and CIN = 2.2µF. TA = +25°C, unless otherwise noted.)
SUPPLY CURRENT
vs. SUPPLY VOLTAGE
80
NO LOAD
40
0
80
60
40
2
3
4
5
6
MAX8532 toc03
60
40
10
20
30
40
50
60
70
-40
80
-15
10
35
60
SUPPLY VOLTAGE (V)
LOAD CURRENT (mA)
TEMPERATURE (°C)
DROPOUT VOLTAGE
vs. LOAD CURRENT
LDO DROPOUT VOLTAGE
vs. VOUT
OUTPUT VOLTAGE ACCURACY
vs. TEMPERATURE
150
100
50
80
IOUT = 80mA
60
40
20
0.2
0
-0.2
-0.6
2.5
20 40 60 80 100 120 140 160 180 200
0.4
-0.4
0
0
0.6
OUTPUT VOLTAGE (%)
100
DROPOUT VOLTAGE (mV)
200
2.6
2.7
2.8
2.9
3.0
3.1
3.2
3.3
-40
-15
10
35
60
VOUT (V)
TEMPERATURE (°C)
PSRR vs. FREQUENCY
OUTPUT NOISE SPECTRAL DENSITY
vs. FREQUENCY
OUTPUT NOISE (10Hz TO 100kHz)
50
40
30
20
85
MAX8532 toc09
MAX8532 toc08
10000
NOISE DENSITY (nVRMS/√Hz)
100Ω LOAD
60
MAX8532 toc07
LOAD CURRENT (mA)
70
85
MAX8532 toc06
120
MAX8532 toc04
250
0
80
0
0
MAX8532 toc05
1
100
20
0
0
DROPOUT VOLTAGE (mV)
100
20
20
PSRR (dB)
120
SUPPLY CURRENT (µA)
120
SUPPLY CURRENT (µA)
80mA LOAD
100
140
MAX8532 toc02
120
SUPPLY CURRENT (µA)
140
MAX8532 toc01
140
60
SUPPLY CURRENT
vs. TEMPERATURE
SUPPLY CURRENT
vs. LOAD CURRENT
1000
VOUT
500µV/div
100
10
0
10
0.01
0.1
1
10
FREQUENCY (kHz)
100
1000
MAX8532
Typical Operating Characteristics
0.01
0.1
1
10
100
1ms/div
FREQUENCY (kHz)
_______________________________________________________________________________________
3
MAX8532
Low-Noise, Low-Dropout,
200mA Linear Regulator in UCSP
Typical Operating Characteristics (continued)
(VOUT = 2.85V, load = 80mA, VIN = 3.8V, COUT = 2.2µF, CBP = 0.01µF, and CIN = 2.2µF. TA = +25°C, unless otherwise noted.)
LINE TRANSIENT
LOAD TRANSIENT
VIN = 3.35V, ILOAD = 1mA TO 80mA
MAX8532 toc10
MAX8532 toc11
4.5V
VIN
3.5V
20mV/div
AC-COUPLED
VOUT
1V/div
20mV/div
AC-COUPLED
VOUT
50mA/div
ILOAD
0
40µs/div
10µs/div
LOAD TRANSIENT
NEAR DROPOUT
SHUTDOWN RESPONSE
MAX8532 toc12
MAX8532 toc13
20mV/div
AC-COUPLED
VOUT
2V/div
VOUT
0
VIN = VOUT + 0.1V
1V/div
50mA/div
VSHDN
ILOAD
0
0
10µs/div
1ms/div
Bump Description
4
PIN
NAME
FUNCTION
B3
N.C.
Not Connected
B2
IN
Regulator Input
B1
OUT
Regulator Output. Guaranteed 200mA output current.
A1
GND
Ground
A2
SHDN
A3
BP
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.
_______________________________________________________________________________________
Low-Noise, Low-Dropout,
200mA Linear Regulator in UCSP
IN
SHDN
SHUTDOWN
AND
POWER-ON
CONTROL
MOS
DRIVER
WITH ILIMIT
ERROR
AMP
OUT
MAX8532
THERMAL
SENSOR
1.25V
REF
GND
BP
Detailed Description
The MAX8532 is a low-power, low-dropout, low-quiescent current linear regulator designed primarily for battery-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 feedback 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 connected 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 advantages 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 problems and consumes only 90µA quiecent current whether
in dropout, light-load, or heavy-load applications (see the
Typical Operating Characteristics). Whereas a PNPbased regulator has dropout voltage independent of the
load, a P-channel MOSFET’s dropout voltage is proportional to load current, providing for low dropout voltage
at heavy loads and extremely low dropout voltage at
lighter loads.
_______________________________________________________________________________________
5
MAX8532
Functional Diagram
MAX8532
Low-Noise, Low-Dropout,
200mA Linear Regulator in UCSP
Current Limit
Low-Noise Operation
The MAX8532 contains an independent current limiter,
which monitors and controls the pass transistor’s gate
voltage, limiting the output current to 210mA (min). The
output can be shorted to ground indefinitely without
damaging the part.
An external 0.01µF bypass capacitor at BP, in conjunction with an internal resistor, creates a lowpass filter.
The MAX8532 exhibits 40µVRMS output voltage noise
with CBP = 0.01µF and COUT = 2.2µF (see the Output
Noise Spectral Density vs. Frequency graph in the
Typical Operating Characteristics).
Thermal-Overload Protection
Thermal-overload protection limits total power dissipation in the MAX8532. When the junction temperature
exceeds TJ = +160°C, the thermal sensor signals the
shutdown logic, turning off the pass transistor and allowing the IC to cool. The thermal sensor turns the pass
transistor on again after the IC’s junction temperature
cools by 10°C, resulting in a pulsed output during continuous thermal-overload conditions.
Thermal-overload protection is designed to protect the
MAX8532 in the event of fault conditions. For continual
operation, do not exceed the absolute maximum junction temperature rating of TJ = +150°C.
Operating Region and Power Dissipation
The MAX8532’s maximum power dissipation depends
on the thermal resistance of the case and circuit board,
the temperature difference between the die junction
and ambient air, and the airflow rate. The power dissipation across the device is P = I OUT (V IN - V OUT ).
Maximum power dissipation:
PMAX = (TJ - TA)/(θJB + θBA)
where TJ - TA is the temperature difference between the
MAX8532 die junction and the surrounding air, θJB (or
θJC) is the thermal resistance of the package, and θBA is
the thermal resistance through the printed circuit board,
copper traces, and other materials, to the surrounding air.
Applications Information
Capacitor Selection
and Regulator Stability
Use a 2.2µF capacitor on the MAX8532’s input. Larger
input capacitor values with lower ESR provide better
supply-noise rejection and line-transient response. To
reduce noise and improve load transients, use large
output capacitors up to 10µF. For stable operation over
the full temperature range and with rated maximum
load currents, use a minimum of 2.2µF (or 1µF for
<150mA loading) for OUT.
Note that some ceramic dielectrics exhibit large capacitance and ESR variation with temperature. With
dielectrics such as Z5U and Y5V, use 4.7µF or more to
ensure stability at temperatures below -10°C. With X7R
or X5R dielectrics, 2.2µF is sufficient at all operating
temperatures. These regulators are optimized for
ceramic capacitors. Tantalum capacitors are not recommended.
PSRR and Operation from
Sources Other than Batteries
The MAX8532 is designed to deliver low dropout voltages and low quiescent currents in battery-powered systems. Power-supply rejection is 62dB at low frequencies
(see the Power-Supply Rejection Ratio vs. Frequency
graph in the Typical Operating Characteristics).
When operating from sources other than batteries,
improve supply-noise rejection and transient response
by increasing the values of the input and output bypass
capacitors and through passive filtering techniques.
6
_______________________________________________________________________________________
Low-Noise, Low-Dropout,
200mA Linear Regulator in UCSP
Input/Output (Dropout Voltage)
A regulator’s minimum input/output voltage differential
(or dropout voltage) determines the lowest usable supply
voltage. In battery-powered systems, this determines
the useful end-of-life battery voltage. Because the
MAX8532 uses a P-channel MOSFET pass transistor, its
dropout voltage is a function of drain-to-source onresistance (RDS(ON)) multiplied by the load current (see
the Typical Operating Characteristics).
Calculating the Maximum
Output Power in UCSP
The maximum output power of the MAX8532 can be limited by the maximum power dissipation of the package.
Ascertain the maximum power dissipation by calculating the power dissipation of the package as a function
of the input voltage, output voltage, and output current.
The maximum power dissipation should not exceed the
package’s maximum power rating:
P = (VIN(MAX) - VOUT) x IOUT
where:
VIN(MAX) = Maximum input voltage
PMAX = Maximum power dissipation of the package
(308mW for UCSP)
VOUT = Output voltage of OUT
IOUT = Maximum output current of OUT
P should be less than PMAX.
Chip Information
PROCESS: BiCMOS
Package Information
For the latest package outline information and land patterns
(footprints), go to www.maxim-ic.com/packages. Note that a
“+”, “#”, or “-” in the package code indicates RoHS status only.
Package drawings may show a different suffix character, but
the drawing pertains to the package regardless of RoHS status.
PACKAGE
TYPE
6 UCSP
PACKAGE
CODE
OUTLINE
NO.
LAND
PATTERN NO.
B6-6
21-0097
—
_______________________________________________________________________________________
7
MAX8532
Load-Transient Considerations
The MAX8532 load-transient response graphs (see the
Typical Operating Characteristics) show two components of the output response: a DC shift in the output
voltage due to the different load currents, and the transient response. Increase the output capacitor’s value
and decrease its ESR to attenuate transient spikes.
MAX8532
Low-Noise, Low-Dropout,
200mA Linear Regulator in UCSP
Revision History
REVISION
NUMBER
REVISION
DATE
0
3/07
Initial release
1
2/12
Added MAX8532EBT2 to Ordering Information, updated lead-free and soldering
information
DESCRIPTION
PAGES
CHANGED
—
1, 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. The parametric values (min and max limits) shown in
the Electrical Characteristics table are guaranteed. Other parametric values quoted in this data sheet are provided for guidance.
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Maxim is a registered trademark of Maxim Integrated Products, Inc.