AP1609中文资料
PWM/PFM Dual Mode Step-up DC/DC Converter
Features
- Input Voltage Range: 2.5~6V
- Output Voltage Range: 3.0~17V （±2.5%） - PWM/PFM Switching Control
- Oscillator Frequency: 300KHz （±20%） - High Efficiency: 91%（Typ .）
- Stand-by Current: I STB ＝1μA.（Typ.） - Built-in internal N-Channel MOS
- Pb-Free Package: SOP-8L/TSSOP-8L
Applications
- Electronic Information Organizers - Palmtops
- Cellular and portable phones - Portable Audio Systems
- Various Multi-function Power Supplies
General Descriptions
The AP1609 is high efficient step-up DC/DC converter. Large output current is possible having a built in internal N channel MOSFET, and using an external coil and diode.
Output voltage is programmable with 1.23V of standard voltage supply internal, and using externally connected components, output voltage （FB ） can be set up at will.
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 AP1609（PWM/PFM switchable ）and the series is highly efficient from light loads to large output currents.
During stand-by time （CE pin “Low”）, current consumption is reduced to 1μA.
Pin Assignment
CE LX FB LX GND GND
PGND Vcc
SOP-8L
GND Vcc Vcc CE
LX PGND PGND FB
TSSOP-8L
Pin Descriptions
Pin No.
Pin Name SOP TSSOP
Description
FB 3 5 Feedback pin
CE 1 4 Chip Enable:
H: Enable
L: Disable
Vcc 2 2、3 IC signal power supply pin PGND 4 6、7 Power MOSFET GND
LX 5、6
8 Switch Pin. Connect external inductor/diode here. Minimize trace area at this pin to reduce EMI.
GND 7、8 1 GND Pin
PWM/PFM Dual Mode Step-up DC/DC Converter
Ordering Information
S : SOP-8L
TS: TSSOP-8L
A : Taping
Block Diagrams
FB
CE
LX
GND Vcc
Absolute Maximum Ratings
Ta=25o C
Parameter
Symbol Ratings Units V IN Pin Voltage V CC -0.3 ~ 7 V
FB Pin Voltage V FB -0.3 ~ V CC +0.3 V CE Pin Voltage
V CE -0.3 ~ V CC +0.3 V Switch Voltage (LX to GND) V SW -0.3 ~ 18 V Switch Current I LX -3 ~ 0.2 A
SOP-8L 1200
Continuous Total Power Dissipation Pd TSSOP-8L 700
mW
Operating Ambient Temperature
Topr -20 ~ +80 o C Storage Temperature Tstg
-20 ~ +125
o
C
PWM/PFM Dual Mode Step-up DC/DC Converter
Electrical Characteristics
AP1609 （F OSC ＝300kHz, V OUT ＝5V ） Ta=25 o C
Parameter Symbol
Conditions
Min.
Typ.
Max. Units
FB Voltage V FB 1.20 1.23 1.26 V Input Voltage V CC 2.5 - 6 V Output Voltage
V OUT 3.0 - 17 V Maximum Switching Output Current
I OUT 2.4 - - A
Drain-Source On-state Resistance
R DS(ON)
I D = 2.4A - 100 - m ?
Quiescent Current I CCQ No load, FB =2V, CE =High - 80 130 μA Shutdown Current
I SD No load, CE =
Low - 1 - μA
Oscillator Frequency Fosc Measuring of EXT waveform,
V IN =output voltage+0.3V 240 300 360 kHz
Maximum Duty Ratio MAXDTY 80 - - %
PFM Duty Ratio PFMDTY No load 15 25 35 %
CE ”High” Voltage V CEH
No external components, V FB =0V,
apply 0.65V CC (min.) to CE, Chip enable 0.65 - - *V CC CE ”Low” Voltage V CEL Same as V CEH ,
Chip disable
- - 0.20 *V CC
Efficiency EFFI - 91 - %
PWM/PFM Dual Mode Step-up DC/DC Converter
Typical Application Circuit
(1) Normal Circuit
SS340
Vout=1.23 (1+ ), R 2 =10K~100K R 1
R 2
×10uH
(2) HV Circuit
SS340
15V
Vout=1.23 (1+ ), R 2 =10K~100K R 1
R 2
×10uH
PWM/PFM Dual Mode Step-up DC/DC Converter Typical Performance Characteristics
PWM/PFM Dual Mode Step-up DC/DC Converter
Typical Performance Characteristics (Continued)
Marking Information
SOP-8L/TSSOP-8L
( Top View )
~
AP1609YY WW
PWM/PFM Dual Mode Step-up DC/DC Converter
Package Information
(1) Package Type: SOP-8L
VIEW "A"
Dimensions In Millimeters Dimensions In Inches
Symbol
Min. Nom. Max. Min. Nom. Max.
A 1.40 1.60 1.75 0.055 0.063 0.069 A1 0.10 - 0.25 0.040 - 0.100 A2 1.30 1.45 1.50 0.051 0.057 0.059
B 0.33 0.41 0.51 0.013 0.016 0.020
C 0.19 0.20 0.25 0.0075 0.008 0.010
D 4.80 5.05 5.30 0.189 0.199 0.209
E 3.70 3.90 4.10 0.146 0.154 0.162 e - 1.27 - - 0.050 - H 5.79 5.99 6.20 0.228 0.236 0.244 L 0.38 0.71 1.27 0.015 0.028 0.050 y - - 0.10 - - 0.004
θ
0o - 8o 0o - 8o
PWM/PFM Dual Mode Step-up DC/DC Converter
Package Information (Continued)
(2) Package Type: TSSOP-8L
PIN 1 INDICATOR ψ
Dimensions In Millimeters Dimensions In Inches
Symbol
Min. Nom. Max. Min. Nom. Max.
A 1.05 1.10 1.20 0.041 0.043 0.047
A1 0.05 0.10 0.15 0.002 0.004 0.006
A2 - 1.00 1.05 - 0.039 0.041
b 0.20 0.25 0.28 0.008 0.01 0.011
C - 0.13 - - 0.005 -
D 2.90 3.05 3.10 0.114 0.12 0.122
E 6.20 6.40 6.60 0.244 0.252 0.26
E1 4.30 4.40 4.50 0.169 0.173 0.177
e - 0.65 - - 0.026 -
L 0.50 0.60 0.70 0.02 0.024 0.028
L1 0.90 1.00 1.10 0.035 0.039 0.043
y - - 0.10 - - 0.004
θ0o4o8o0o4o8o