Anachip AP1624WA Pwm/pfm dual mode step-up dc/dc controller Datasheet

AP1624
PWM/PFM Dual Mode Step-up DC/DC Controller
„ Features
„ General Descriptions
- Input Voltage Range: 0.9~6V
- PWM/PFM Switching Control
- High Efficiency: 90%
- Oscillator Frequency: 300kHz(±15%)
- Stand-by Current: ISTB=3µA.(Typ.)
- Pb-Free Package: SOT23-5
The AP1624 is multi-functional step-up DC/DC
controllers. Large output current is possible using
an externally connected N channel MOSFET, coil,
and diode.
Output voltage (VOUT)is programmable with 1.23V
of standard voltage supply internal, and using
externally connected components, output voltage
(FB) can be set up at will.
„ Applications
With a 300KHz switching frequency, the size of the
external components can be reduced.
Control switches from PFM to PWM during light
loads with the AP1624(PFM/PWM switchable)and
the series is highly efficient from light loads to large
output currents.
- 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 3µA.
„ Pin Assignment
„ Pin Descriptions
(TOP VIEW)
EXT
GND
5
4
Pin
No.
1
2
3
1
2
3
FB
VCC
CE
4
5
Pin
Function
Name
FB
Feedback pin
VCC IC Power Supply pin
Chip Enable:
CE
H: Enable
L: Disable
GND GND pin
EXT External N-MOSFET Connection
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.1.1 Dec.23, 2004
1/7
AP1624
PWM/PFM Dual Mode Step-up DC/DC Controller
„ Ordering Information
AP1624 X X
Package
W : SOT23-5
Packing
A : Taping
„ Block Diagrams
FB
+
+
-
CE
VCC
Phase
Compensation
-
Vref with
CE
PWM/PFM
Controller
Buffer,
Driver
PWM
Comparator
Ramp Wave
Generator,
OSC
„ Absolute Maximum Ratings
Parameter
VIN Pin Voltage
FB Pin Voltage
CE Pin Voltage
EXT Pin Voltage
EXT Pin Current
Continuous Total
Power Dissipation
Operating Ambient
Temperature
Storage Temperature
EXT
GND
Ta=25oC
Units
V
V
V
V
mA
Symbol
VCC
VFB
VCE
VEXT
IEXT
Ratings
-0.3 ~ 7
-0.3 ~ VCC+0.3
-0.3 ~ VCC+0.3
-0.3 ~ VCC+0.3
±100
Pd
250
Topr
-30 ~ +80
o
-40 ~ +125
o
Tstg
mW
C
C
Anachip Corp.
www.anachip.com.tw
Rev.1.1 Dec.23, 2004
2/7
AP1624
PWM/PFM Dual Mode Step-up DC/DC Controller
„ Electrical Characteristics
AP1624
Parameter
Symbol
FB Voltage
Maximum Input Voltage
VFB
VCC
Supply Current 1
ICC1
Supply Current 2
ICC2
Stand-by Current
ISTB
Oscillator Frequency
Maximum Duty Ratio
PFM Duty Ratio
CE ”High” Voltage
CE ”Low” Voltage
EXT Source Current
EXT Sink Current
Efficiency
Ta=25 oC
(VIN=3.3V, VOUT=5V, Load=300mA)
Conditions
No external components,
CE=VIN, VFB=1.5V
No external components,
CE=VIN, VFB=0V
No external components,
CE=0V, VFB=0.5V
Fosc
No external components
MAXDTY
VCC=5V, VFB=0V
PFMDTY No load
Apply above 0.65Vcc (min.) to CE,
VCEH
Operating mode
Apply under 0.2Vcc (min.) to CE,
VCEL
Standby mode
ISOURCE VCE=VIN, VFB=0V, VEXT=VCC-0.4V
ISINK
VCE=VIN, VFB=2V, VEXT=0.4V
EFFI
Min.
Typ.
Max.
Units
1.205
6
1.23
-
1.255
-
V
V
-
50
100
µA
-
100
200
µA
-
3
-
µA
255
300
345
kHz
80
-
-
%
15
25
35
%
0.65
-
-
*Vcc
-
-
0.20
*Vcc
-
40
70
90
-
mA
mA
%
Anachip Corp.
www.anachip.com.tw
Rev.1.1 Dec.23, 2004
3/7
AP1624
PWM/PFM Dual Mode Step-up DC/DC Controller
„ Typical Application Circuit
(1) Normal Circuit
10 µH
2.5V~5.5V
VIN
SS240
VOUT
100
VCC
EXT
100K
R1
NMOS
AF2302
CE
470µ 0.1 µ
GND
470µ
FB
0.1µ
R2
0.1 µ
0.1µ
VOUT =1.23
× (1+
R1
R2
), R2=10K ~ 20K
(2) LV Circuit
L
0.9V~2.5V
VIN
Schottky Diode
3.3V
VOUT
CB
NPN
220K
VCC
EXT
RB
CP
100K
CE
GND
FB
47µ
47µ
0.1 µ
130K
RB=Adjust according to load and Tr.hFE levels
CB ≤ 1/(2π × RB × FOSC × 0.7)
(3) HV Circuit
10 µH
Above to 5V
VIN
24V/1A
SS240
VOUT
R
VCC
EXT
FDS6612
330K
100K
0.1 µ
470µ
CE
ZD
5V
GND
FB
0.1 µ
0.1µ
470 µ
18K
Anachip Corp.
www.anachip.com.tw
Rev.1.1 Dec.23, 2004
4/7
AP1624
PWM/PFM Dual Mode Step-up DC/DC Controller
„ Typical Performance Characteristics
AP1624 Load Regulation
AP1624 Load Regulation
12.5
5
Vcc=5V,Vout=12V
12.4
12.3
4.9
12.2
4.85
Vout (V)
12.1
Vout (V)
12
11.9
11.8
11.7
0
200
400
600
Load (mA)
800
0
1000
AP1624 Line Regulation
5.1
400
600
Load (mA)
800
1000
1200
Vcc=5V, Iout=300mA
Vout
(V)
Vout (V)
5.2
200
AP1624 Temperature v.s. Vout
10.0
9.8
9.6
9.4
9.2
9.0
8.8
8.6
8.4
8.2
8.0
Vcc=3.3V,Vout=5V
5.3
5
4.9
4.8
4.7
4.6
4.5
2.5
3
Vcc (V)
3.5
-50
4
0
25
50
o
75
100
AP1624 Vcc v.s. Frequency
410
Vcc = 3.3V
340
-25
Temperature ( C)
AP1624 Load v.s. Frequency
350
380
330
320
Frequency (KHz)
Frequency (KHz)
4.7
4.6
11.5
5.4
4.8
4.75
4.65
11.6
5.5
Vcc=3.3V,Vout=5V
4.95
310
300
290
280
270
350
320
290
260
230
260
250
200
0
0.2
0.4
0.6
0.8
1
1.2
2.5
Load (A)
3
3.5
4
Vcc (V)
4.5
5
5.5
Anachip Corp.
www.anachip.com.tw
Rev.1.1 Dec.23, 2004
5/7
AP1624
PWM/PFM Dual Mode Step-up DC/DC Controller
„ Typical Performance Characteristics (Continued)
500
Frequency (KHz)
Vcc=5V, Vout=12V
90
Efficiency (%)
AP1624 Temperature v.s. Frequency
AP1624 Load v.s. Efficiency
100
Vcc=3.3V, Vout=5V
80
70
210
0.2
0.4
0.6
Load (A)
0.8
1
300
200
100
0
-50
60
0
400
1.2
-25
0
25
50
75
100
Temperature (oC)
AP1624 Vcc v.s. Supply
100
No Outside Circuit, VFB=1.5V
AP1624 Temperature v.s. Efficiency
Vcc=5V,Vout=12V, Iout=300mA
90
150
Efficiency(%)
Supply Current (uA)
180
120
90
60
80
70
30
60
0
1.5
2.5
3.5
Vcc (V)
4.5
5.5
-50
-25
0
25
50
o
75
100
Temperature ( C)
„ Marking Information
Appendix
4
7
5
XX : Identification code
(See Appendix)
Y : Year: 0-9
M : Month: A~L
XX Y M
1
2
Part Number
Package
AP1624
SOT23-5
Identification
Code
EQ
3
SOT23-5L
Anachip Corp.
www.anachip.com.tw
Rev.1.1 Dec.23, 2004
6/7
AP1624
PWM/PFM Dual Mode Step-up DC/DC Controller
„ Package Information
Package Type: SOT23-5L
D
e1
θ1(4x)
4
5
E1
E
A
0.10 C
5x
A2
Seating Plane
A1
1
2
θ 2(4x)
3
b
e
With
Plating
b1
C
C1
Gauge Plane
0.25 mm
θ
Base
Metal
L
b
Symbol
A
A1
A2
b
b1
c
c1
D
E
E1
L
L1
e
e1
θ
θ1
θ2
L1
Dimensions In Millimeters
Min.
Nom.
Max.
1.05
1.20
1.35
0.05
0.10
0.15
1.00
1.10
1.20
0.25
0.55
0.25
0.40
0.45
0.08
0.20
0.08
0.11
0.15
2.70
2.85
3.00
2.60
2.80
3.00
1.50
1.60
1.70
0.35
0.45
0.55
0.60 Ref.
0.95 Bsc.
1.90 Bsc.
5o
10o
0o
o
o
3
5
7o
6o
8o
10o
Dimensions In Inches
Min.
Nom.
Max.
0.041
0.047
0.053
0.002
0.004
0.006
0.039
0.043
0.047
0.010
0.022
0.010
0.016
0.018
0.003
0.008
0.003
0.004
0.006
0.106
0.112
0.118
0.102
0.110
0.118
0.059
0.063
0.067
0.014
0.018
0.022
0.024 Ref.
0.037 Bsc.
0.075 Bsc.
0o
5o
10o
o
o
3
5
7o
6o
8o
10o
Anachip Corp.
www.anachip.com.tw
Rev.1.1 Dec.23, 2004
7/7
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