INTEGRATED CIRCUITS
MAX8877/MAX8878-XX
Very low noise, very low dropout,
150 mA linear regulator, CMOS process
technology
Product data
Supersedes data of 2003 May 14
2003 Aug 08
Philips
Semiconductors
Philips Semiconductors
Product data
Very low noise, very low dropout, 150 mA
linear regulator, CMOS process technology
MAX8877/MAX8878-XX
GENERAL DESCRIPTION
The MAX8877/MAX8878-XX family are very low-noise, very
low-dropout, low quiescent-current linear regulators designed for
battery-powered applications, although they can also be used for
devices powered by AC-DC converters. The parts are available in a
range of preset output voltages from 2.5 V to 4.5 V. Typical dropout
voltages are only 165 mV at 150 mA, and 41 mV at 50 mA. Reverse
battery current is extremely low, 0.5
µA
typ.
For demanding applications, output noise voltage of typically
30
µV
rms
is achieved with a 0.01
µF
capacitor on the bypass pin.
The input voltage can vary from 2.5 V
DC
to 6.5 V
DC
, providing up to
150 mA output current.
An internal P-channel FET pass transistor maintains an 85
µA
typical supply current, independent of the load current and dropout
voltage. Other features include a 0.01
µA
logic-controlled shutdown,
short circuit and thermal shutdown protection, and reverse battery
protection. The MAX8878 also includes an auto-discharge function
which actively discharges the output voltage to ground when the
device is placed in shutdown.
To accommodate high density layouts, it is packaged in the 5-pin
SOT23-5 and wafer-level chip-scale package (WL-CSP).
SO5 (SOT23-5)
WL-CSP5
(bottom view)
FEATURES
•
Low output noise: 30
µV
rms
•
Low dropout voltages: 165 mV at 150 mA; 41 mV at 50 mA
•
Thermal overload and short circuit protection
•
Reverse battery protection
•
Output current limit
•
85
µA
no-load supply current
•
100
µA
typical operating supply current at I
OUT
= 150 mA
•
Preset output voltage of 2.5 V, 2.6 V, 2.7 V, 2.8 V, 3.0 V, 3.3 V,
3.6 V, 4.2 V and 4.5 V; other voltages upon request in 100 mV
increments
APPLICATIONS
•
Cordless, PCS, and cellular telephones
•
PCMCIA cards and modems
•
Handheld and portable instruments
•
Palmtop computers and electronic planners
SIMPLIFIED SYSTEM DIAGRAM
TOP VIEW
(Wafer-Level CSP pin assignments using JEDEC standard matrix)
(SOT23-5 package pin assignments in
parentheses.)
V
OUT
BYPASS
A3 (5)
(2)
PRESET OUTPUT VOLTAGES:
2.5 V TO 4.5 V
R
LOAD
C
OUT
1
µF
A1 (1)
B2
(3) C1
GND
SHDN
C
BYPASS
(OPTIONAL)
(4) C3
V
IN
DC
2.5 to 6.5 V
C
IN
1
µF
ON
OFF
SL02009
Figure 1. Simplified system diagram.
2003 Aug 08
2
Philips Semiconductors
Product data
Very low noise, very low dropout, 150 mA linear
regulator, CMOS process technology
MAX8877/MAX8878-XX
ORDERING INFORMATION
PACKAGE
TYPE NUMBER
MAX8877-XXD
MAX8878-XXD
MAX8877-XXUK
MAX8878-XXUK
NAME
SO5 (SOT23-5)
WL-CSP5
DESCRIPTION
plastic small outline package; 5 leads; body width 1.6 mm
wafer-level, chip-scale package; 5 bumps
TEMPERATURE
RANGE
–40
°C
to +85
°C
–40
°C
to +85
°C
NOTE:
The device has nine (9) voltage options, indicated by the
XX
on the Type Number.
DEVICE
PACKAGE
PRESET
OUTPUT
VOLTAGE
2.5 V
2.6 V
2.7 V
2.8 V
3.0 V
3.3 V
3.6 V
4.2 V
4.5 V
DEVICE
PACKAGE
PRESET
OUTPUT
VOLTAGE
2.5 V
2.6 V
2.7 V
2.8 V
3.0 V
3.3 V
3.6 V
4.2 V
4.5 V
MAX8877-25
MAX8877-26
MAX8877-27
MAX8877-28
MAX8877-30
MAX8877-33
MAX8877-36
MAX8877-42
MAX8877-45
SO5 (SOT23-5), WL-CSP5
SO5 (SOT23-5), WL-CSP5
SO5 (SOT23-5), WL-CSP5
SO5 (SOT23-5), WL-CSP5
SO5 (SOT23-5), WL-CSP5
SO5 (SOT23-5), WL-CSP5
SO5 (SOT23-5), WL-CSP5
SO5 (SOT23-5), WL-CSP5
SO5 (SOT23-5), WL-CSP5
MAX8878-25
MAX8878-26
MAX8878-27
MAX8878-28
MAX8878-30
MAX8878-33
MAX8878-36
MAX8878-42
MAX8878-45
SO5 (SOT23-5), WL-CSP5
SO5 (SOT23-5), WL-CSP5
SO5 (SOT23-5), WL-CSP5
SO5 (SOT23-5), WL-CSP5
SO5 (SOT23-5), WL-CSP5
SO5 (SOT23-5), WL-CSP5
SO5 (SOT23-5), WL-CSP5
SO5 (SOT23-5), WL-CSP5
SO5 (SOT23-5), WL-CSP5
Marking code
Each device is marked with a four letter code. The first three letters designate the product. The fourth, represented by an ‘x’, designates the
date tracking code.
Part
MAX8877
MAX8877-25D, UK
MAX8877-26D
MAX8877-27D
MAX8877-28D, UK
MAX8877-30D, UK
MAX8877-33D, UK
MAX8877-36D, UK
MAX8877-42D, UK
MAX8877-45D, UK
AMGx
APBx
ANKx
AMHx
AMJx
AMKx
AMLx
AMMx
AMNx
Marking
Part
MAX8878
MAX8878-25D, UK
MAX8878-26D, UK
MAX8878-27D, UK
MAX8878-28D, UK
MAX8878-30D, UK
MAX8878-33D, UK
MAX8878-36D, UK
MAX8878-42D, UK
MAX8878-45D, UK
APNx
APPx
APJx
APRx
APSx
APTx
APUx
APVx
APWx
Marking
2003 Aug 08
3
Philips Semiconductors
Product data
Very low noise, very low dropout, 150 mA linear
regulator, CMOS process technology
MAX8877/MAX8878-XX
PIN CONFIGURATION
D Package
V
IN
1
5
V
OUT
PIN DESCRIPTION
BALL
A1
PIN
1
SYMBOL
V
IN
DESCRIPTION
Regulator Input. Supply voltage
ranges from 2.5 V to 6.5 V. Bypass
with a 1
µF
capacitor to GND.
Ground. The bump may also serve as
heat spreader by soldering it to a large
PCB pad or circuit board ground plane
to maximize power dissipation.
Active-LOW Shutdown input. This pin
must be actively terminated. Tie to V
IN
if this function is not used.
Noise bypass pin. Low noise of
typically 30
µV
rms
with optional
0.01
µF
bypass capacitor. Larger
bypass capacitor further reduces
noise.
Regulator output. Sources up to 150
mA. Minimum output capacitor is 1
µF.
GND
2
MAX8877-XX
MAX8878-XX
4
BYPASS
B2
2
GND
SHDN
3
C1
3
SHDN
UK Package
V
OUT
A3
B2
A1
GND
C1
C3
BYPASS
C3
4
BYPASS
A3
SHDN
5
V
OUT
V
IN
TOP VIEW
SL02010
Figure 2. Pin configurations.
MAXIMUM RATINGS
SYMBOL
V
IN
V
SHDN
V
SHDN
–V
IN
V
OUT
, V
BYPASS
T
stg
T
j
T
amb
P
D
PARAMETER
Input voltage
SHDN to GND voltage
SHDN to V
IN
voltage
V
OUT
and BYPASS to GND voltage
Storage temperature range
Junction temperature range
Ambient temperature range
Power dissipation
T
amb
= 25
°C
(derating factor above 25
°C
= 5.1 mW/°C)
CONDITIONS
MIN.
–6.5
–6.5
–6.5
–0.3
–65
–55
–40
–
MAX.
+6.5
+6.5
+0.3
V
IN
+ 0.3
+150
+140
+85
637
UNIT
V
DC
V
DC
V
DC
V
DC
°C
°C
°C
mW
NOTES:
1. Maximum Ratings are those values beyond which damage to the device may occur. Exposure to these conditions or conditions beyond
those indicated may adversely affect device reliability. Functional operation under absolute maximum-rated condition is not implied.
2003 Aug 08
4
Philips Semiconductors
Product data
Very low noise, very low dropout, 150 mA linear
regulator, CMOS process technology
MAX8877/MAX8878-XX
ELECTRICAL CHARACTERISTICS
V
IN
= V
OUT(nom)
+ 0.5 V; –40
°C ≤
T
amb
≤
+85
°C
unless otherwise noted. Typical values are at T
amb
= +25
°C.
(See Note 1.)
SYMBOL
V
IN
PARAMETER
Input voltage
Output voltage accuracy
I
OUT
= 0.1 mA; T
amb
= +25
°C;
V
OUT
≥
2.5 V
I
OUT
= 0.1 mA to 150 mA; –40
°C ≤
T
amb
≤
+85
°C;
V
OUT
≥
2.5 V
I
OUT
= 0.1 mA; T
amb
= +25
°C;
V
OUT
< 2.5 V
I
OUT
= 1 mA to 150 mA; –40
°C ≤
T
amb
≤
+85
°C;
V
OUT
< 2.5 V
I
OUT(max)
I
LIM
I
Q
I
RBC
∆V
lnr
∆V
ldr
Maximum output current
Current limit
Ground pin current
Reverse battery current
Line regulation
Load regulation
Dropout voltage (note 2)
2.5 V or (V
OUT
+ 0.1 V)
≤
V
IN
≤
6.5 V; I
OUT
= 1 mA
0.1 mA
≤
I
OUT
; C
OUT
= 1.0
µF
I
OUT
= 1 mA
I
OUT
= 50 mA
I
OUT
= 150 mA
V
n(o)
( )
Output voltage noise
C
OUT
= 10
µF
C
OUT
= 100
µF
f = 10 Hz to 100 kHz;
C
BYPASS
= 0.1
µF
01 F
Shutdown
V
IH
V
IL
I
SHDN
I
Q(SHDN)
t
SHDN–Delay
y
RSD
HIGH-level SHDN input
threshold
LOW–level SHDN input
threshold
SHDN input bias current
SHDN supply current
Shutdown exit delay
( t 3)
(note
Resistance Shutdown
Discharge
Thermal shutdown
junction temperature
Thermal shutdown
hysteresis
2.5
≤
V
IN
≤
6.5 V
2.5
≤
V
IN
≤
6.5 V
V
SHDN
= V
IN
V
OUT
= 0 V
C
BYPASS
= 0.01
µF;
C
OUT
= 1.0
µF;
no l d
10 F
load
MAX8878-XX only
T
amb
= +25
°C
T
amb
= +25
°C
T
amb
= +25
°C
–40
°C ≤
T
amb
≤
+85
°C
2.0
–
–
–
–
–
–
–
–
–
0.01
30
–
300
–
0.4
100
1
150
300
–
V
V
µA
µA
µs
µs
Ω
C
OUT
= 10
µF
C
OUT
= 100
µF
I
OUT
= 0 mA
I
OUT
= 150 mA
CONDITIONS
MIN.
2.5
–1.4
–3.0
–3.0
–3.5
150
160
–
–
–
–0.125
–
–
–
–
–
–
–
–
TYP.
–
–
–
–
–
–
390
85
100
0.5
0
0.01
1.0
41
165
28
20
13
12
MAX.
6.5
1.4
2.0
3.0
3.5
–
–
180
–
–
0.125
0.02
–
90
–
–
–
–
–
UNIT
V
%
%
%
%
mA
mA
µA
µA
µA
%/V
%/mA
mV
mV
mV
µV
rms
µV
rms
µV
rms
µV
rms
Thermal protection
T
SHDN
∆T
SHDN
–
–
140
15
–
–
°C
°C
NOTES:
1. Limits are 100% production tested at T
amb
= +25
°C.
Limits over the operating temperature range are guaranteed through correlation using
Statistical Quality Control (SQC) methods.
2. The dropout voltage is defined as V
IN
– V
OUT
, when V
OUT
is 100 mV below the value of V
OUT
for V
IN
= V
OUT
+ 0.5 V.
(Only applicable for V
OUT
= +2.5 V to +4.5 V.)
3. Time needed for V
OUT
to reach 95% of final value.
2003 Aug 08
5
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