AP1621B-33WLA [ICT]
Dual Switching Controller, 0.1A, 360kHz Switching Freq-Max, PDSO5, LEAD FREE, SOT-23, 5 LEAD;型号: | AP1621B-33WLA |
厂家: | InnoChips Technology |
描述: | Dual Switching Controller, 0.1A, 360kHz Switching Freq-Max, PDSO5, LEAD FREE, SOT-23, 5 LEAD 光电二极管 |
文件: | 总5页 (文件大小:180K) |
中文: | 中文翻译 | 下载: | 下载PDF数据表文档文件 |
AP1621
PWM/PFM Dual Mode Step-down DC/DC Controller
Features
General Descriptions
The AP1621 series are multi-functional step-down
DC/DC converters with built-in speed, low ON
resistance drivers. A more than 1A output current is
possible using an externally connected transistor,
coil, diode and capacitor.
- Input voltage range:2.2V~7V(VOUT type)
- Adjustable version(±2.5%)
- Oscillator frequency: 300KHz(±20%)
- High Efficiency: 92%(typ .)
- Stand-by capability: ISTB=2µA.(Max .)
- Output voltage type possible(FB)
- Package: SOT23-5
Output voltage is set-up by external resistor(. ±2.5%
accuracy).
With a 300KHz switching frequency, the size of the
external components can be reduced.
Control switches from PWM to PFM during light
loads with the AP1621(PWM/PFM switchable)and
the series is highly efficient from light loads to large
output currents.
Applications
● Electronic Information Organizers
● Palmtops
● Cellular and portable phones
● Portable Audio Systems
● Various Multi-function Power Supplies
During stand-by time (CE pin “LOW”),current
consumption is reduced to less than 2µA.
With U.V.L.O internal, the external MOSFET. Will
be forcibly switched off if used below the stipulated
voltage.
Pin Assignment
Pin Descriptions
Pin No.
Pin
Function
Name
A
B
(Top View)
1
4
V OUT External PMOSFET Connection
FB
5
CE
4
VDD
5
VOUT
4
2
3
2
5
GND Ground
V DD Power Supply
Chip Enable:
AP1621A
AP1621B
4
5
1
3
CE
H: Enable
L: Disable
FB
Feedback pin
1
2
3
1
2
3
VOUT
CE
GND
GND FB
VDD
SOT23-5
This datasheet contains new product information. Anachip 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.
Rev.1.2 Dec. 23, 2004
1/5
AP1621
PWM/PFM Dual Mode Step-down DC/DC Controller
Ordering Information
AP1621X X X X X
Version
A : A version Blank: Adjustable
B : B version -33: 3.3V
Vout
Package
Packing
A : Taping
Lead Free
Blank : Normal
W : SOT23-5
L : Lead Free Package
Block Diagrams
VDD
FB
Phase
Compensation
+
-
+
Buffer,
Vout
Driver
-
PWM
Comparator
Ramp Wave
Vref with
CE
PWM/PFM
Controller
CE
Generator,
OSC
GND
Absolute Maximum Ratings
Ta=25°C
Parameter
Symbol
Rating
Unit
VIN Pin Voltage
VDD
VOUT
VFB
-0.3 ~ 8
V
V
VOUT Pin Voltage
FB Pin Voltage
-0.3
~
~
~
VIN+0.3
VIN+0.3
VIN+0.3
-0.3
-0.3
V
CE Pin Voltage
VOUT Pin Current
Continuous Total
Power Dissipation
Operating Ambient
Temperature
VCE
V
mA
±100
VOUT
Pd
250
mW
Topr
Tstg
-30 ~ +80
°C
°C
Storage Temperature
-40 ~ +125
Anachip Corp.
www.anachip.com.tw
Rev. 1.2 Dec 23, 2004
2/5
AP1621
PWM/PFM Dual Mode Step-down DC/DC Controller
Electrical Characteristics
AP1621
(VOUT=3.3V, FOSC=300kHz)
Ta=25°C
Conditions
Parameter
Symbol
Min.
Typ.
Max. Unit
FB Voltage
VFB
VOUT
VIN
1.1625
3.2
1.2
3.3
-
1.2375
V
V
V
Output Voltage
AP1621-33 only
3.4
-
Maximum Input Voltage
UVLO Voltage(Min.
Operating Voltage)
7
Same as IDD, voltage required to
maintain H at VOUT
VUVLO
-
-
2.2
V
No external components,
Supply Current
IDD
-
-
35
-
102
2
µA
µA
CE=VIN, VOUT=0V
No external components,
CE=VIN, VOUT=0V
Stand-by Current
ISTB
Measuring of EXT/waveform,
VIN=output voltage+0.3V
Oscillator Frequency
Fosc
240
300
360
KHz
Maximum Duty Ratio
PFM Duty Ratio
MAXDTY
100
15
-
-
%
%
PFMDTY No load (AP1621 only)
25
35
No external components, VFB=0V,
CE ”High” Voltage
VCEH
apply 0.65V (min.) to CE, determine 0.65
-
-
*Vcc
V
OUT”Low”
Same as VCEH, determine
EXT/”High”
CE ”Low” Voltage
Efficiency
VCEL
-
-
-
0.20
-
*Vcc
%
EFFI
92
Measuring conditions: Unless otherwise specified, connect external components. VIN=5.0V,LOUT=220mA
Series Amendment:
AP1621
External Components: CCE =0.1µF, RCE=100kΩ
Anachip Corp.
www.anachip.com.tw
Rev. 1.2 Dec 23, 2004
3/5
AP1621
PWM/PFM Dual Mode Step-down DC/DC Controller
Typical Application Circuit
(1) AP1621-Adj
PMOS
OUT
L
C FB
RA
R
VCC
VOUT
FB
+
-
RB
=~200K
V
CC
D1
C
VCC
AP1621
RCE
100K
CE
VSS
CCE
0.1uF
R
A
Vo = Vref × (1+
)
RB
(2) AP1621-33 Only
PMOS
VOUT
OUT
L
R
VCC
FB
+
-
V
CC
D1
C
VCC
AP1621
RCE
100K
CE
VSS
CCE
0.1uF
Marking Information
5
4
XX : Identification code
(See Appendix)
Y : Year: 0-9
Appendix
Output
Part Number
XX Y M X
version
AP1621A
EX
AP1621B
EU
M : Month: A~L
ADJ
3.3V
EZ
ET
X : Blank: normal
1
2
3
L: Lead Free Package
SOT23-5L
Anachip Corp.
www.anachip.com.tw
Rev. 1.2 Dec 23, 2004
4/5
AP1621
PWM/PFM Dual Mode Step-down DC/DC Controller
Package Information
Package Type: SOT23-5L
D
e1
1(4x)
θ
4
5
1
C
0.10
A2
A
5x
E1
E
Seating Plane
A1
2(4x)
θ
2
3
b
e
With
Plating
b1
C
C1
Gauge Plane
0.25 mm
θ
Base
Metal
L
b
L1
Dimensions In Millimeters
Dimensions In Inches
Symbol
Min.
1.05
0.05
1.00
0.25
0.25
0.08
0.08
2.70
2.60
1.50
0.35
Nom.
1.20
0.10
1.10
-
Max.
1.35
0.15
1.20
0.55
0.45
0.20
0.15
3.00
3.00
1.70
0.55
Min.
Nom.
0.047
0.004
0.043
-
Max.
A
A1
A2
b
0.041
0.002
0.039
0.010
0.010
0.003
0.003
0.106
0.102
0.059
0.014
0.053
0.006
0.047
0.022
0.018
0.008
0.006
0.118
0.118
0.067
0.022
b1
c
0.40
-
0.016
-
c1
D
0.11
2.85
2.80
1.60
0.45
0.60 Ref.
0.95 Bsc.
1.90 Bsc.
5o
0.004
0.112
0.110
0.063
0.018
0.024 Ref.
0.037 Bsc.
0.075 Bsc.
5o
E
E1
L
L1
e
e1
θ
0o
3o
6o
10o
7o
0o
3o
6o
10o
7o
θ1
θ2
5o
5o
8o
10o
8o
10o
Anachip Corp.
www.anachip.com.tw
Rev. 1.2 Dec 23, 2004
5/5
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