Low noise charge pump DC/DC converter that produces a
regulated 4.5V and 5V output. No external inductor is required for operation. Using
three small capacitors, the
APE1602A/B
can deliver up to 100mA to the voltage
regulated output. The
APE1602A/B
features very low quiescent current and high
efficiency over a large portion of its load range, making this device ideal for
battery-powered applications.
APE1602A/B has over current protection, short circuit protection and thermal
shutdown protection capability. Internal soft-start circuitry effectively reduces the
in-rush current while start-up.
The APE1602A/B is available in a
SOT23-6
package.
FEATURES
-
-
-
-
-
-
-
Input Voltage Range : 2.8V to VOUT
Fixed 5V/4.5V±4% Output Voltage
High Frequency 1MHz Operation
Internal Soft Start Function
Short Circuit and Thermal shutdown Protection
≤
1µA Shutdown Current
6-pin, SOT-23
Pb-Free
package
Block Diagram
CP
CN
VIN
Charge Pump
x2
1 MHz
Oscillation
+
`
VOUT
OSC
-
EN
Bangap
SCP and OCP
Thermal
Shutdown
V
REF
GND
This datasheet contains new product information. Advanced Power Electronics Corp. reserves the rights to modify the product specification without notice. No liability is
assumed as a result of the use of this product. No rights under any patent accompany the sale of the product.
200815071pre-1/5
Advanced Power
Electronics Corp.
Low Noise, Regulated Charge Pump
PIN ASSIGNMET
Name
APE1602
Description
Regulated output pin. Bypass this pin
to ground with a 2.2µF (min) low
equivalent series resistance (ESR)
capacitor.
Ground pin
Shutdown input pin
H：normal operation
L：disable converter
Flying Capacitor Negative Terminal
CP
6
VIN
5
CN
4
VOUT
( Top View)
SOT23-6L
1
2
3
EN
GND
EN
VOUT GND
CN
VIN
CP
IC power supply pin
Flying Capacitor Positive Terminal
ORDER/MARKING INFORMATION
Order Information
Top Marking
APE1602XX
Output
A : 5V
B : 4.5V
Package Type
Y : SOT23-6L
E1X X
WW : 01~26(A~Z)
27~52(A~Z)
Year: 6 = 2006
A = 2010
Part number : E1 APE1602A
E2 APE1602B
2/5
Advanced Power
Electronics Corp.
Low Noise, Regulated Charge Pump
Absolute Maximum Ratings
(at Ta=25℃)
Characteristics
VIN Pin Voltage
VOUT Pin Voltage
Other Pin Voltage
Storage Temperature Range
Junction Temperature
Thermal Resistance from Junction to ambient
Power Dissipation[ PD=( T
J
-T
A
) /
θ
JA
]
T
ST
T
J
θ
JA
PD
Symbol
V
IN
V
OUT
Rating
APE1602
Unit
V
V
V
℃
℃
℃
/W
- 0.3 to 6V
- 0.3 to 6V
- 0.3 to 6V
-65 to +150
-40 to 125
250
0.4
W
Note :
θ
JA
is measured in the natural convection at T
A
= 25°C on a low effective thermal conductivity
test board of JEDEC 51-3 thermal measurement standard.
Recommended Operating Conditions
Characteristics
Operating Temperature Range
Symbol
T
OP
Rating
-40 to +85
Unit
℃
Electrical Characteristics
(V
IN
= 3.7V, Ta=25°C, unless otherwise specified)
Characteristics
Input Voltage Range
Quiescent Current
Shutdown Current
Output Voltage
Symbol
V
IN
I
Q
I
SD
V
OUT
I
OUT
= 0
Conditions
Min Typ Max Units
2.8
-
-
-
2
-
5
4.5
-
-
350
180
1.0
40
-
-
-
-
140
V
OUT
4
1
5.2
4.68
-
-
500
250
1.2
-
-
0.4
0.1
0.11
-
V
mA
uA
V
mA
mA
mA
mA
MHz
mV
V
uA
uA
℃
APE1602A,
VIN>3.2V, I
OUT
<110mA
APE1602B,
VIN>3.2V, I
OUT
<150mA
APE1602A,
VIN>3.2V, C
PUMP
= 1uF
APE1602B,
VIN>3.2V, C
PUMP
= 1uF
4.8
4.32
110
150
300
-
0.8
Maximum Output Current
Input Current Limit
Short circuit current
Oscillator Frequency
Vout Ripple
EN Pin Logic input threshold
voltage
EN Pin Input Current
Thermal shutdown Temp
I
OUT
I
OC
I
SC
F
OSC
I
OUT
=60mA, C
OUT
=2.2uF(X7R,X5R)
V
IH
V
IL
I
IH
I
IL
TSD
V
EN
=V
IN
(ON)
V
EN
=GND (OFF)
-
1.5
-
-
-
-
3/5
Advanced Power
Electronics Corp.
Low Noise, Regulated Charge Pump
Application Circuit
C1
APE1602
U1
4
5
3
CN
VIN
EN
CP
VOUT
GND
6
1
2
R1
R
R2
R
R3
R
VOUT
APE1602A/B
VIN
2.8 to VOUT
+
C2
-
C3
LED
D1
LED
D2
LED
D3
ILED
VOUT-VLED
ILED= ------------
R
APE1602A --> VOUT=5V
APE1602B --> VOUT=4.5V
DEVICE
APE1602A
Application Condition
IOUT<60mA @ VIN>3.2V
IOUT<110mA @ VIN>3.2V
IOUT<80mA @ VIN>3.2V
IOUT<150mA @ VIN>3.2V
C1 (uF)
0.22
1
0.22
1
C2 (uF)
2.2
10
2.2
10
C3 (uF)
2.2
10
2.2
10
APE1602B
* C1, C2 and C3 must be used Low ESR capacitors, X7R or X5R dielectrics are recommended.
Application Information
Capacitor Selection
Careful selection of the three external capacitors C1, C2 and C3 is very important
because they will affect ramp up time, output ripple and transient performance. Optimum
performance will be obtained when low ESR (<100mΩ) ceramic capacitors are used for C1
and C2 and C3. In general, low ESR may be defined as less than 100mΩ. In all cases,
X7R or X5R dielectric are recommended. For particular application, low ESR Tantalum
capacitors may be substituted; however optimum output ripple performance may not be
realized. Aluminum electrolytic capacitors are not recommended for using with the
APE1602A/B due to there are high ESR characteristic.
In general, lower values for C1, C2 and C3 may be utilized for light load current
applications (<60mA). Drawing a load current of 60mA or less may use a C2 and C3
4/5
Advanced Power
Electronics Corp.
Low Noise, Regulated Charge Pump
APE1602
capacitor value as low as 2.2µF and a C1 value of 0.22µF. C2 and C3 may range from
2.2µF for light loads to 10µF for heavy output load conditions (<110mA). C1 may range
from 0.22µF for light loads to 1µF for heavy output load conditions. If C1 is increased, C3
should also be increased by the same ratio to minimize output ripple. As a basic rule, the
ratio between C2, C3 and C1 should be approximately 10 to 1. Lowering the C2, C3 and
C1 value can decrease the ramp-up time of VOUT, but it will increase the output ripple
oppositely.
Efficiency
The efficiency of the charge pump regulator varies with the output voltage version,
the applied input voltage, the load current, and the internal operation mode of the device.
The approximate efficiency is given by:
Efficiency (%) =
=
P
OUT
P
IN
V
OUT
2V
IN
X100% =
V
OUT
X
I
OUT
V
IN
X
2I
OUT
X100%
X100% (2X mode Charge Pump Operating)
For a charge pump with an output of 5V and a nominal input of 3V, the theoretical
efficiency is 83.33%. Due to internal switching losses and IC quiescent current
consumption, the actual efficiency can be measured as 82.41%.
PCB Board Layout
The APE1602A/B is a high-frequency switched-capacitor converter. For best
performance and minimize vout ripple, place all of the components as close to IC as
possible. Besides a solid ground plane is recommended on the bottom layer of the PCB.
The ground should be connected C2 and C3 together and as close to the IC as possible.
