rt8059 Richtek Technology Corporation, rt8059 Datasheet - Page 2

• Manufacturer Part Number: rt8059
• Description: 1.5mhz, 1a, High Efficiency Pwm Step-down Dc/dc Converter
• Manufacturer: Richtek Technology Corporation

RT8059
Typical Application Circuit
with R2 = 60kΩ to 300kΩ , I
and (R1 x C1) should be in the range between 3x10
Functional Pin Description
Function Block Diagram
www.richtek.com
2
V
OUT
FB
Pin No.
=
1
2
3
4
5
V
REF
x
⎛
⎜
⎝
1
Compensation
EN
GND
LX
VIN
FB
+
Amplifier
Pin Name
R2
R1
Slope
Error
⎞
⎟
⎠
COMP
2.8V to 5.5V
RC
R2
= 2μA to 10μA,
V
IN
Chip Enable (Active High). Do not leave the EN pin floating.
Ground.
Switch Node.
Power Input.
Feedback Input Pin.
Comparator
UVLO
Shutdown
4.7µF
Current
C
OSC &
Control
Sense
PWM
IN
EN
4
1
EN
VIN
−6
V
RT8059
REF
GND
and 6x10
2
FB
LX
Detector
Detector
3
5
−6
Current
Control
Logic
Limit
Zero
for component selection.
2.2µH
Pin Function
L
I
R2
C1
Driver
R1
R2
10µF
C
OUT
V
OUT
VIN
DS8059-03 April 2011
R
R
S1
S2
LX
GND