Power APE1910 Step-up pfm dc/dc converter Datasheet

Advanced Power
Electronics Corp.
APE1910
STEP-UP PFM DC/DC CONVERTER
FEATURES
DESCRIPTION
Input Voltage : 1.2V to 12V
Low Quiescent Current : 17uA (typ.)
Low Saturation Voltage : 200mV Typical at 300mA
350mA Typical Switching Current Limiting
High Output Voltage : up to 34V
Low Profile SOT-23-5L Pb-Free Packaging
Halogen Free Product
The APE1910 is a Pulse Frequency Modulation (PFM)
DC/DC converter. It is Low quiescent current 30uA and
shutdown current less 1uA. The APE1910 feature a wide
input voltage. The operating voltage is ranged from 1.2V to
12V. It also feature low quiescent current, switching current
limiting, low temperature coefficient.
Smaller package size and fewer tiny external
components are required in the application to save space
and lower cost. APE1910 is available in SOT-23-5L
TYPICAL APPLICATION
L1
VIN=5V
1
2
1
Vout=30V
2
22uH'
D1
B140
R3
4.7M
C1
VIN
SW
GND
FB
4.7uF/25V
EN
R1
100K
C3
4.7u/50V
APE1910
C2
R2
200K
option
Vout= VFB x (1 + R3/R2)
VFB=1.23V, R2 suggest 100K~300K
Figure 1. VCC=5V/ VOUT=30V for LCE.OLED Bias Supply
L1
VIN=1.2V~2.5V
1
2
10uH
1
Vout=3.3V
2
D1
B140
R3
202K
C1
4.7uF/25V
VIN
EN
R1
100K
SW
GND
FB
C4
10pF
C3
4.7u/50V
APE1910
C2
Option
R2
120K
Vout=VFB x (1 + R3/R2)
VFB=1.23V, R2 Suggest 100K~300K
Figure 2. VCC=1.2~2.5V/ VOUT=3.3V for 1 or 2 cells to 3.3V boost converter
Data and specifications subject to change without notice
1
20130108V1.1
Advanced Power
Electronics Corp.
APE1910
ABSOLUTE MAXIMUM RATINGS
VIN Pin Voltage(VIN) ---------------------------------------- 15V
SW Voltage(VSW ) ------------------------------------------- 36V
Feedback Pin Voltage(VFB) ------------------------------ VIN
EN Pin Voltage(VEN) --------------------------------------- 15V
Maximum Junction Temperature(T J) ------------------ 150°C
Storage Temperature Range(T ST) --------------------- -40°C To 150°C
Operating Temperature Range(T OP) ------------------ -40°C To 125°C
Power Dissipation(PD) ------------------------------------- 0.4W
Thermal Resistance from Junction to Case(Rth JC)
110°C/W
Thermal Resistance from Junction to Ambient(Rth JA)Note
250°C/W
Note. RthJA is measured with the PCB copper area of approximately 1 in2 (Multi-layer) that need connect to GND pin of the APE1910
PACKAGE / ORDERING INFORMATION
Top View
VIN
EN
4
5
APE1910X
Package Type
1
Y5 : SOT-23-5L
2
3
SW GND FB
SOT-23-5L
ELECTRICAL SPECIFICATIONS
(VIN=5V, VOUT=12V, TA=25℃, unless otherwise specified)
Parameter
SYM
TEST CONDITION
MIN
TYP
MAX
UNITS
Input Voltage
VIN
1.2
-
12
V
Quiesceint Current
ICCQ
VFB=1.5V, Not Switching
-
17
30
uA
Shutdown Current
VEN=0V
-
-
1
uA
Feedback Voltage
ISD
VFB
1.205
1.23
1.255
V
Feedback Bias Current
IFB
VFB=1.23V
-
30
80
nA
1.2V<VIN<12V, Load=10mA
-
0.05
0.1
%/V
Line Regulation
VLine
Switching Saturation Voltage
VCESAT
-
200
300
mV
300
350
400
mA
Switch-off, VSW =5V
-
0.01
5
uA
VENH
High (regulator ON)
0.9
-
-
VENL
Low (regulator ON)
-
-
0.25
VEN=1.2V
-
2
3
VEN=5V
-
8
12
Switch Current Limit
ISW
Switch Leakage Current
ILEAK
EN Pin Logic Input Threshold Voltage
EN Pin Input Current
IEN
ISW =300mA
V
uA
PIN DESCRIPTIONS
PIN SYMBOL
VIN
PIN DESCRIPITON
IC Power Supply Pin
SW
Switch pin. Connect external inductor & diode here
FB
Feedback Pin
Shutdown Pin
EN
H : normal operation
L : operation stopped
GND
Ground Pin
2
Advanced Power
Electronics Corp.
APE1910
BLOCK DIAGRAM
1 SW
Driver
Feedback
Comparator
RC
-
A1
+
CC
400nS
One Shot
-
VREF
1.23V
+
Current-Limit
Comparator
FB 3
VIN 5
Q1
2 GND
EN 4
Shutdown
Current-Limit
Reference
APPLICATION INFORMATION
Capacitor Selection
The small size of ceramic capacitors makes them ideal for APE1910
applications. X5R and X7R types are recommended because they retain their
capacitance over wider voltage and temperature ranges than other types such as Y5V
or Z5U. A 4.7uF input capacitor and a 4.7uF output capacitor are sufficient for most
APE1910 applications.
Inductor Selection
A 10uH inductor is recommended for most APE1910 applications. Although small
size and high efficiency are major concerns, the inductor should have low core losses
and low DCR (copper wire resistance).
Diode Selection
Schottky diodes with higher current ratings usually have lower forward voltage
drop, larger diode capacitance and fast reverse recovery, it is the ideal choices for
APE1910 applications. The forward voltage drop of a Schottky diode represents the
conduction losses in the system, while the diode capacitance (CT or CD) represents the
switching losses. For diode selection, both forward voltage drop and diode capacitance
need to be considered.
PCB Layout Guide
When laying out the PC board, the following suggestions should be taken to ensure
proper operation of the APE1910. These items are also illustrated graphically in below.
1. The power traces, including the GND trace, the SW trace and the VCC trace should be
kept short, direct and wide to allow large current flow. Put enough multiply-layer pads
when they need to change the trace layer.
2. Connect the input capacitor C1 to the VCC pin as closely as possible to get good power
filter effect.
3. Do not trace signal line under inductor.
3
Advanced Power
Electronics Corp.
APE1910
TYPICAL PERFORMANCE CHARACTERISTICS
Temperature VS Quiescent Current
25
24
24
23
23
Quiescent Current (uA)
Quiescent Current (uA)
VIN VS Quiescent Current
25
22
21
20
19
18
17
16
VIN=12V
22
21
20
VIN=5V
19
18
VIN=1.2V
17
16
15
15
1
3
5
7
9
11
13
-50
-25
0
VIN (V)
Shutdown Pin Voltage VS Shutdwon Pin Current
50
75
100
Temperature VS Feedback Voltage
40
1.255
1.25
35
1.245
30
Feedback Voltage (V)
Shutdown Pin Current (uA)
25
Temperature (℃)
25
20
15
10
1.24
1.235
1.23
1.225
1.22
1.215
5
1.21
0
1.205
0
2
4
6
8
10
12
-50
-25
0
25
50
75
100
Temperature (℃)
Shutdown Pin Voltage (V)
90
VIN=4.2V
80
Efficiency (% )
70
60
VIN=2.5V
VIN=3.3V
50
40
30
20
10
0
0
5
10
15
20
25
30
35
Load Current (mA)
4
Advanced Power
Electronics Corp.
APE1910
MARKING INFORMATION
SOT-23-5L
B1YWS
Part Number : B1
Week:
A~Z : 01~26
a~z : 27~52
ID Code : Internal
Year :
A = 2010
1 = 2011
:
:
5
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