datasheet for APE8837-HF by Advanced Power Electronics Corp.

datasheet for APE8837-HF by Advanced Power Electronics Corp.
Advanced Power
Electronics Corp.
APE8837
DUAL CHANNEL LDO REGULATORS WITH ENABLE
FEATURES
DESCRIPTION
The APE8837 is a high accurately, low noise, high
ripple rejection ratio, low dropout, dual CMOS LDO voltage
regulators with enable function. The EN function allows the
output of each regulator to be turned off independently,
resulting in greatly reduced power consumption.
The APE8837 has the soft start function to suppress
the inrush current. The current limit is over 250mA per
channel and also operates as a short protection for the
output current limiter. The output voltage for each regulator
is set independently by metal trimming.
The APE8837 is fully compatible with low ESR ceramic
capacitors, reducing cost and improving output stability. This
high level output stability is maintained even during frequent
load fluctuations, due to the excellent transient response
performance and high PSRR achieved across a broad range
of frequency. It is available in the SOT-26 and DFN 2x2
packages.
Input Voltage Range : 2.5V to 6V
Varied Fixed Output Voltage Combinations
150mV Dropout at 100mA Output
Current (Vout
2.8V)
Output Current: 200mA/channel (typ.)
Low Quiescent Current
Standby Current: 2uA (typ.)
Current Limit and Short Current Protections
Thermal Shutdown Protection
Fast Transient Response
Low ESR Capacitor Compatible (X7R, X5R)
Available in the 6-Pin Pb-Free SOT-26
and DFN 2x2 Packages
TYPICAL APPLICATION
VIN
C IN
1uF
V OUT1
VOUT2
COUT1
COUT2
1uF
1uF
ORDERING INFORMATION
Output Type Code : (VOUT1+VOUT2)
A : 1.5V+2.8V
APE8837 X X - HF
Halogen Free
Output Type
(Refer Table)
Package
Y : SOT-26
GN2 : DFN 2x2
H : 2.8+3.0V
R : 3.3V+1.8V
B : 1.8V+2.8V
J : 2.8+3.3V
T : 1.5V+3.3V
C : 1.8V+2.6V
K : 3.0+3.0V
V : 1.5V+3.0V
D : 1.8V+3.3V
L : 3.0V+3.3V
W : 1.2V+2.8V
E : 2.5V+2.8V
M : 3.3+3.3V
X : 1.2V+1.2V
F : 2.8V+1.2V
P : 1.8V+3.0V
Y : 2.8V+1.5V
G : 2.8V+1.8V
Q : 1.5V+2.5V
Table1.
Data and specifications subject to change without notice
1
201003171
Advanced Power
Electronics Corp.
APE8837
ABSOLUTE MAXIMUM RATINGS (at TA=25°C)
Input Voltage (VIN) -----------------------------------------
GND - 0.3 to + 6V
Output Current (IO1+IO2) -----------------------------------
500mA
Output Voltage (VOUT1/VOUT2) ----------------------- GND - 0.3 to VIN + 0.3
Enable Voltage (VEN1/VEN2) --------------------------- GND - 0.3 to VIN + 0.3
Power Dissipation (PD) ------------------------------------- 250mW
Storage Temperature Range (T ST) ---------------------
-40 to 150°C
Operating Temperature Range (T OP) ------------------
-40 to 85°C
Junction Temperature Range (T J) ----------------------
-40 to 125°C
Thermal Resistance from Junction to case (Rth jc)
180oC/W
Thermal Resistance from Junction to ambient (Rthja)
250oC/W
Note. Rthja is measured with the PCB copper area of approximately 1 in 2(Multi-layer). That need connect to GND pin.
PACKAGE INFORMATION
VOUT1 GND VOUT2
6
(Top View)
EN1
1
VIN
2
EN2
3
5
6 VOUT1
APE8837
4
GND
5 GND
2
1
4 VOUT2
3
EN1 VIN EN2
DFN 2x2 (6L)
SOT-26
(TOP VIEW)
APE8837
ELECTRICAL SPECIFICATIONS (TA=25
Parameter
Input Voltage
SYM
VIN
Output Voltage Accuracy
VOUT
Quiescent Current
ICC
Dropout Voltage
VDROP
, unless otherwise noted.)
TEST CONDITION
TYP
MAX
Note1.
2.5
-
5.5
V
IOUT =1mA, VIN=5V,VOUT >2.0V
-2
-
2
%
-0.04
-
0.04
V
uA
IOUT =1mA, VIN=5V,VOUT
2.0V
IOUT1,2=0mA, VIN=5V
-
60
100
IOUT=0.2A, VO=VO-2%, VOUT=1.5V
-
1000
1200
IOUT=0.2A, VO=VO-2%, VOUT=1.8V
-
700
900
IOUT=0.2A, VO=VO-2%, VOUT>2.5V
Current Limit (Note2)
ILIMIT
UNITS
MIN
VIN=VOUT (T) + 1.0V, VEN=VIN
-
300
400
250
-
-
mV
mA
Short Circuit Current
ISC
VOUT<1.0V, each channel
-
150
-
mA
Line Regulation
VLINE
IOUT =1mA, VIN=VOUT+1V to 6.0V
-
0.2
0.3
%/V
IOUT =1~100mA, VIN=VOUT+1V
-
0.01
0.03
%/mA
F=120Hz, IOUT= 30mA
-
60
-
dB
PPM/ºC
Load Regulation (Note 3)
Ripple Rejection
VLOAD
PSRR
-
+100
-
VENH
2
-
-
VENL
-
-
0.8
-
1
2
uA
-
IOUT=30mA (Note 4)
Output Voltage Temperature Coefficient
Enable Input Threshold
Enable Pull-high Current
Shutdown Current
IEN
VEN1,2 = 0V
ISD
IOUT1,2 =0mA, VIN=5V, VEN1,2=0V
V
2
4
uA
Thermal Shutdown Temperature
TST
-
150
-
ºC
Thermal Shutdown Hysterisis
TSH
-
40
-
ºC
2
Advanced Power
Electronics Corp.
APE8837
Note 1. VIN (min) =VOUT+VDROP
Note 2. Current limit is measured at constant junction temperature by using pulsed testing with a low ON time.
Note 3. Regulation is measured at constant junction temperature by using pulsed testing with a low ON time.
Note 4. Guaranteed by design.
PIN DESCRIPTIONS
PIN SYMBOL
VIN
PIN DESCRIPTION
Input Voltage
GND
Common Ground Pin
EN1
VOUT1 Enable Control Pin
EN2
VOUT2 Enable Control Pin
VOUT1
Output1 Voltage
VOUT2
Output2 Voltage
BLOCK DIAGRAM
VIN
Thermal
Shutdown
+
Bandgap
VOUT2
Error
Amp
Current
Limit1
- +
-
Current
Limit2
Error
Amp
Enable2
VOUT1
Enable1
GND
EN2
EN1
FUNCTION DESCRIPTION
The APE8837 is a highly accurate, dual, low noise, CMOS LDO voltage
regulators with enable function. The output voltage for each regulator is set
independently by fuse trimming. As illustrated in function block diagram, it consists of a
reference, error amplifier, a P-channel pass transistor, an ON/OFF control logic and an
internal feedback voltage divider. The band gap reference is connected to the error
amplifier, which compares the reference with the feedback voltage and amplifies the
voltage difference. If the feedback voltage is lower than the reference voltage, the
pass- transistor gate is pulled lower, which allows more current to pass to the VOUT pin
and increases the output voltage. If the feedback voltage is too high, the pass
transistor gate is pulled up to decrease the output voltage. The output voltage is feed
back through an internal resistive divider connected to VOUT pin. Additional blocks
include an output current limiter, thermal sensor, and shutdown logic.
3
Advanced Power
Electronics Corp.
APE8837
Enable Function
EN1 and EN2 pin start and stop the corresponding outputs independently. When
the EN pin is switched to the power off level, the operation of all internal circuit stops,
the build-in P-channel MOSFET output transistor between pins VIN and VOUT is
switched off, allowing current consumption to be drastically reduced.
Dropout Voltage
A regulator’s minimum input-output voltage differential, or dropout voltage,
determines the lowest usable supply voltage. The APE8837 use a P- channel
MOSFET pass transistor, its dropout voltage is function of drain-to-source onresistance RDS (ON) multiplied by the load current.
VDROPOUT = VIN-VOUT = RDS(ON) x IOUT
Current Limit
Each channel of APE8837 includes a fold back current limiter. It monitors and
controls the pass transistor’s gate voltage, estimates the output current, and limits the
output current within 250mA.
Thermal Shutdown Protection
Thermal Shutdown protection limits total power dissipation of APE8837. When
the junction temperature exceeds TJ = +150°C, a thermal sensor turns off the pass
transistor, allowing the IC to cool down. The thermal sensor turns the pass transistor
on again after the junction temperature cools down by 40°C, resulting in a pulsed
output during continuous thermal shutdown conditions.
Thermal shutdown protection is designed to protect the APE8837 in the event of fault
conditions. For continuous operation, the absolute maximum operating junction
temperature rating of TJ = +125°C should not be exceeded.
APPLICATION INFORMATION
Like any low-dropout regulator, the APE8837 requires input and output
decoupling capacitors. The device is specifically designed for portable applications
requiring minimum board space and smallest components. These capacitors must be
correctly selected for good performance (see Capacitor Characteristics Section).
Please note that linear regulators with a low dropout voltage have high internal loop
gains which require care in guarding against oscillation caused by insufficient
decoupling capacitance.
Input Capacitor
An input capacitance of 1µF is required between input pin and ground directly
(the amount of the capacitance may be increased without limit). The input capacitor
must be located less than 1cm from the device to assure input stability. A lower ESR
capacitor allows the use of less capacitance, while higher ESR type (like aluminum
electrolytic) requires more capacitance. Capacitor types (aluminum, ceramic and
tantalum) can be mixed in parallel, but the total equivalent input capacitance/ ESR
must be defined as above to stable operation. There are no requirements for the ESR
on the input capacitor, but tolerance and temperature coefficient must be considered
when selecting the capacitor to ensure the capacitance will be 1µF over the entire
operating temperature range.
4
Advanced Power
Electronics Corp.
APE8837
Output Capacitor
The APE8837 is designed specifically to work with very small ceramic output
capacitors. A ceramic capacitor (temperature characteristics X7R, X5R) in 1 F is
suitable for the APE8837 application. The recommended minimum capacitance for the
device is 1 F, X5R or X7R dielectric ceramic, between VOUT and GND for stability,
but it may be increased without limit. Higher capacitance values help to improve
transient. The output capacitor's ESR is critical because it forms a zero to provide
phase lead which is required for loop stability.
Thermal Considerations
The APE8837 series can deliver a current of up to 200mA/channel over the full
operating junction temperature range. However, the maximum output current must be
debated at higher ambient temperature to ensure the junction temperature does not
exceed 125°C. With all possible conditions, the junction temperature must be within
the range specified under operating conditions. Power dissipation can be calculated
based on the output current and the voltage drop across regulator.
PD = (VIN - VOUT) IOUT + VIN x IGND
The final operating junction temperature for any set of conditions can be
estimated by the following thermal equation:
PD (MAX) = (TJ (MAX) - TA) / JA
Where TJ (MAX) is the maximum junction temperature of the die (125°C) and TA is
the maximum ambient temperature. The junction to ambient thermal resistance ( JA)
SOT-26 package at recommended minimum footprint is 250°C/W.
5
ADVANCED POWER ELECTRONICS CORP.
Package Outline : SOT-26
G
L
L
Millimeters
C
A
SYMBOLS
MIN
NOM
MAX
A
2.70
2.90
3.10
B
2.60
2.80
3.00
C
1.40
1.60
1.80
D
0.30
0.43
0.55
E
0.00
0.05
0.10
B
D
H
1.20REF
G
1.90REF
I
0.12REF
J
0.37REF
L
0.95REF
H
E
I
1.All Dimension Are In Millimeters.
J
2.Dimension Does Not Include Mold Protrusions.
Part Marking Information & Packing : SOT-26
RP&YY
Part Number : RP
Vout Code
(see the table1.)
Date Code
YY:2004,2008,2012…
YY:2003,2007,2011…
YY:2002,2006,2010…
YY:2001,2005,2009…
ADVANCED POWER ELECTRONICS CORP.
Package Outline : DFN 2x2-6L
Millimeters
SYMBOLS
MIN
NOM
MAX
0.80
0.85
1.00
0.00
b
D
E
0.05
0.20
0.25
0.30
0.195
0.203
0.211
1.95
2.00
2.05
0.55
0.60
0.65
1.95
2.00
2.05
1.15
1.20
1.25
e
0.65 (ref)
0.3
0.35
0.4
1.All Dimension Are In Millimeters.
2.Dimension Does Not Include Mold Protrusions.
Part Marking Information & Packing : DFN 2x2-6L
Part Number : RP
Vout Code (see the table1.)
RP&
YWS
Date Code (YWS)
Y:Year
W Week
S Sequence
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