Advanced Power
Electronics Corp.
APU8850
150mA ULTRA LOW DROPOUT POSITIVE
ADJUSTABLE AND FIXED REGULATORS
DESCRIPTION
FEATURES
The APU8850 device is an efficient linear voltage
regulator with better than 2% initial voltage accuracy, very
low dropout voltage and very low ground current designed
especially for hand held, battery powered applications.
Other features of the device are: TTL compatible
enable/shutdown control input, current limiting and thermal
shutdown.
The APU8850 is available in fixed and adjustable
output voltage versions in a small SOT-23-5L, TSOT-23-5L,
J-lead 2021-8, ESOP-8 & SOT-89 package.
Stable with 2.2uF Low ESR Ceramic Capacitor
2% Voltage Reference Accuracy
Wide Operating Range: 4.5V ~ 25V
5uA Quiescent Current in Shutdown
Current Limit and Thermal Shutdown
Logic Input Enable Pin
RoHS Compliant & Halogen Free
SOT-89, ESOP-8, J-lead 2021-8, SOT-23-5L
& TSOT-23-5L Package
APPLICATIONS
Laptop, Notebook & Palmtop Computers
Battery Powered Equipments
PCMCIA Vcc & Vpp Regulator
Consumer Electronics
High Efficiency Linear Power Supplies
TYPICAL APPLICATION
VIN
VIN
C1
2.2uF
VOUT
R1
+
.
GND
Enable
+
EN
C2
2.2uF
VOUT
Vo= 1.25 x (1+R1/R2)
R2
ADJ
Figure 1 - Typical application of the APU8850 adjustable voltage regulator.
VIN
VIN
C1
2.2uF
VOUT=3.3V
VOUT
+
Enable
+
GND
EN
CBYP
+
C2
2.2uF
C3
1000pF
Figure 2 - Typical application of the APU8850-33 fixed voltage regulator.
ORDERING INFORMATION
APU8850X-XX
Package
Y5 : SOT-23-5L
TY5 : TSOT-23-5L
U : J-lead 2021-8
G : SOT-89
MP : ESOP-8
Output Voltage
Blank : ADJ
15 : 1.5V
18 : 1.8V
25 : 2.5V
28 : 2.8V
30 : 3.0V
33 : 3.3V
50 : 5.0V
Data and specifications subject to change without notice
1
20130705V9.1
Advanced Power
Electronics Corp.
APU8850
ABSOLUTE MAXIMUM RATINGS (TA=25oC, unless otherwise specified.)
Input Voltage (VIN) ----------------------------------------- 27V
Enable Input Voltage (VEN) ------------------------------ 27V
Storage Temperature Range (T ST) -------------------- -65 to 150oC
Operating Junction Temperature Range (T J) ------- -40 to 85oC
Thermal Resistance Junction to Ambient (R thja)
SOT-23-5L/TSOT-23-5L
o
256 C/W
SOT-89
250oC/W
ESOP-8
150oC/W
300oC/W
J-lead 2021-8
PACKAGE INFORMATION
ESOP-8 (MP) ADJ
Fixed
ADJ
TOP VIEW
TOP VIEW
EN GND VIN
EN GND VIN
1
8
2
7
GND
3
6
4
5
VOUT
SOT-23-5L
TSOT-23-5L
ADJ
VOUT
SOT-23-5L
TSOT-23-5L
CBYP
VOUT
NC
NC
ADJ
SOT-89
ESOP-8 (MP) Fixed
(Top View)
( Top View )
(Top View)
VIN
VOUT
NC
GND
NC
CBYP
.EN
NC
TAB is VIN
1
8
2
7
GND
3
6
4
5
VIN
GND
NC
J-lead 2021-8
( Top View )
EN 1
8 GND
ADJ 2
7 GND
VOUT 3
6 GND
VIN 4
5 GND
1
2
GND
VIN
EN
3
VOUT
ELECTRICAL SPECIFICATIONS
Unless otherwise specified, these specifications apply over C IN=CO=2.2F, IO=100uA, VIN(MIN)=4.5V, CBYP=470pF
(for fixed voltage devices), V EN=2V and TA=25oC. Typical values refer to TA=25oC. Low duty cycle pulse testing is used
which keeps junction and case temperatures equal to the ambient temperature.
Parameter
Reference Voltage
Line Regulation
Load Regulation (Note 1)
SYM
Vo
∆VI
∆VL
Dropout Voltage (Note 2)
VDROP
Ground Current (Note 3)
IQ
Ground Current-SD Activated
IQ(SD)
Adjust Pin Current
IADJ
Current Limit
ICL
Short Current
IZ
Enable Pin Input LO Voltage
Enable Pin Input HI Voltage
VEN(L)
VEN(H)
TEST CONDITION
VO + 2V<VIN<25V, IO=1mA
MIN
UNITS
TYP
MAX
-2
-
2
%
-
0.1
-
%/V
%
VIN=VO+2V
-
0.5
-
IO=100uA
-
1
-
IO=100mA
-
1.2
-
VEN=2V, IO=100uA
-
250
-
uA
VEN=0V or Open
-
1
-
uA
VIN=4.5V, VO=VADJ
-
0.1
-
uA
VO=0V
V
200
-
-
mA
-
175
-
mA
Regulator OFF
-
-
0.8
V
Regulator ON
2
-
-
V
2
Advanced Power
Electronics Corp.
APU8850
ELECTRICAL SPECIFICATIONS (Cont.)
Unless otherwise specified, these specifications apply over C IN=CO=2.2F, IO=100uA, VIN(MIN)=4.5V, CBYP=470pF
(for fixed voltage devices), V EN=2V and TA=25oC. Typical values refer to TA=25oC. Low duty cycle pulse testing is used
which keeps junction and case temperatures equal to the ambient temperature.
MIN
TYP
MAX
UNITS
VEN(L) =0V
-
0.01
-
uA
VEN(H)=2V
-
10
-
uA
CBYP=1nF, COUT=2.2uF, fRIPPLE = 1kHz
-
70
-
dB
Over Temperature Shutdown
-
150
-
o
Over Temperature Shutdown Hysteresis
-
10
-
o
Parameter
SYM
Enable Pin Input LO Current
Enable Pin Input HI Current
Ripple Rejection
PSRR
TEST CONDITION
C
C
Note 1: Low duty cycle pulse testing with Kelvin connections is required in order to maintain accurate data.
Note 2: Dropout voltage is defined as the minimum differential voltage between VIN and VOUT required to maintain regulation at VOUT.
It is measured when the output voltage drops 1% below its nominal value.
Note 3: Ground current is the regulator quiescent current plus the pass transistor current. The total current from the supply is the sum
of the load current plus the ground pin current.
PIN DESCRIPTIONS
PIN SYMBOL
PIN DESCRIPTION
The input pin of the regulator. Typically a large storage capacitor is connected from
this pin to ground to insure that the input voltage does not sag below the minimum
VIN
drop out voltage during the load transient response. This pin must always be higher
than VOUT by at least the amount of the dropout voltage and some margin in order
.
for the device to regulate properly.
GND
EN
Adj (Adjustable only)
CBYP (Fixed only)
VOUT
Ground pin. This pin must be connected to the lowest potential in the system and
all other pins must be at higher potential with respect to this pin.
Enable pin. A low signal or left open on this pin shuts down the output. This pin
must be tied HI or to VIN for normal operation.
A resistor divider from this pin to the VOUT pin and ground sets the output voltage.
A 470 to 1000pF bypass capacitor connected to this pin reduces the output noise.
The output of the regulator. A minimum of 2.2uF with max ESR of 1Ω capacitor
must be connected from this pin to ground to insure stability.
3
Advanced Power
Electronics Corp.
APU8850
BLOCK DIAGRAM
VIN
1
ADJ
4
VOUT
5
+
+
Thermal
Shutdown
2
GND
Current
Limit
3
EN
Figure 3 - APU8850Y5 Adjustable output block diagram.
VIN
1
VOUT
5
+
CBYP
-
4
+
Thermal
Shutdown
GND
2
Current
Limit
.
3
EN
Figure 4 - APU8850Y5 Fixed Mode output block diagram.
TYPICAL PERFORMANCE CHARACTERISTICS
PSRR (CBYP=1nF, COUT=2.2uF, fRIPPLE = 1kHz)
4
Advanced Power
Electronics Corp.
APU8850
TYPICAL PERFORMANCE CHARACTERISTICS
VIN=5V，VEN=5V，VOUT=3.3V
Output Voltage VS. Temperature
3.37
Output Voltage
3.36
3.35
3.34
3.33
3.32
3.31
Iout=0mA
Iout=10mA
Iout=20mA
3.3
-40
-20
0
20
40
60
80
100
Temperature(℃ )
VIN=5V，VEN=5V，VOUT=3.3V
ADJ Voltage VS. Temperature
1.264
.
ADJ Voltage
1.26
1.256
1.252
1.248
1.244
Iout=0mA
Iout=10mA
Iout=20mA
1.24
-40
-20
0
20
40
60
80
100
Temperature(℃ )
VIN=4.5V ,VOUT=3.3V IOUT=10mA~200mA
Load Transient
IOUT
VOUT
5
Advanced Power
Electronics Corp.
APU8850
TYPICAL PERFORMANCE CHARACTERISTICS
Quiescent Current vs. Input Voltage
Quiescent Current vs. Temperature
VIN=4.5V , VOUT=3.3V , IOUT=10mA
VIN=4.5V~20V , VOUT=3.3V
300
350
300
Q u iescen t Cu rren t(u A)
Quiescent Current(uA)
250
200
150
100
250
200
150
100
50
50
0
0
-40
-20
0
20
40
60
80
100
4.5
125
5
6
7
8
9
Output Voltage vs. Output Current
11
12
13
14
15
16
17
18
19
20
Output Voltage vs. Input Voltage
VIN=4.5V , VOUT=3.3V , IOUT=10mA~200mA
VIN=4.5V~20V , VOUT=3.3V
3.312
3.32
3.31
3.311
3.3
3.31
3.29
.
3.28
Output Voltage(V)
O u t p u t V o lt a g e ( V )
10
Input Voltage(V)
Temperature('C)
3.309
3.308
3.27
3.307
3.26
3.306
Iout=0m A
3.25
20
40
60
80
100
120
140
160
180
200
Iout=10m A
Iout=20m A
3.305
4.5
5
6
7
8
9
Output Current(mA)
10
11
12
13
14
15
16
17
18
19
20
Input Voltage(V)
Dropout Voltage vs. Temperature
Dropout Voltage vs. Output Current
VIN=4.5V , VOUT=3.3V
VIN=4.5V , VOUT=3.3V , IOUT=10mA~200mA
1.2
0.9
0.8
1
D r o p o u t V o l t a g e (V )
Dropout V oltage(V )
0.7
0.6
0.5
0.4
0.3
0.8
0.6
0.4
0.2
0.2
0.1
Iout=0mA
Iout=10mA
0
0
0
-40
-20
0
20
40
Temperature('C)
60
80
100
20
40
60
80
100
120
140
160
180
200
125
Output Current(mA)
6
Advanced Power
Electronics Corp.
APU8850
MARKING INFORMATION
ESOP-8
8850MP-&&
Part Number
Package Code
Output Voltage :
Identification
Code
VOUT
Identification
Code
VOUT
Blank
ADJ
28
2.8V
15
1.5V
30
3.0V
18
1.8V
33
3.3V
25
2.5V
50
5.0V
YWWSSS
Date Code (YWWSSS)
Y：Last Digit Of The Year
WW：Week
SSS：Sequence
SOT-23-5L / TSOT-23-5L
Part Number : RZ
RZ&SS
Output Voltage :
Date Code
SS:2004,2008,2012…
SS:2003,2007,2011…
SS:2002,2006,2010…
SS:2001,2005,2009…
Identification
Code
VOUT
Identification
Code
VOUT
Blank
ADJ
G
2.8V
C
1.5V
H
3.0V
D
1.8V
I
3.3V
F
2.5V
J
5.0V
Identification
Code
VOUT
Identification
Code
VOUT
Blank
ADJ
G
2.8V
C
1.5V
H
3.0V
D
1.8V
I
3.3V
F
2.5V
J
5.0V
.
J-lead 2021-8
Part Number : RZ
RZ&SS
Output Voltage :
Date Code
SS:2004,2008,2012…
SS:2003,2007,2011…
SS:2002,2006,2010…
SS:2001,2005,2009…
SOT-89
Part Number
Output Voltage :
8850&
YWWS
Date Code (YWWS)
Y:Year
WW：Week
S：Sequence
Identification
Code
VOUT
Identification
Code
VOUT
Blank
ADJ
G
2.8V
C
1.5V
H
3.0V
D
1.8V
I
3.3V
F
2.5V
J
5.0V
7