RT8055GQW Richtek USA Inc, RT8055GQW Datasheet - Page 12

• Manufacturer Part Number: RT8055GQW
• Description: IC DCDC CONV STP-DN SYNC 10WDFN
• Manufacturer: Richtek USA Inc
• Type: Step-Down (Buck), PWM - Current Moder

Specifications of RT8055GQW

• Internal Switch(s): Yes
• Synchronous Rectifier: Yes
• Number Of Outputs: 1
• Voltage - Output: 0.8 V ~ 5 V
• Current - Output: 3A
• Frequency - Switching: 300kHz ~ 2MHz
• Voltage - Input: 2.6 V ~ 5.5 V
• Operating Temperature: -40°C ~ 85°C
• Mounting Type: Surface Mount
• Package / Case: 10-WFDFN Exposed Pad
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

RT8055
www.richtek.com
12
Recommended component selection for Typical Application
Component Supplier
Component Supplier
TAIYO YUDEN
TAIYO YUDEN
TAIYO YUDEN
TAIYO YUDEN
Panasonic
Panasonic
TDK
TDK
LX should be
connected to Inductor
by wide and short
trace, keep sensitive
compontents away
from this trace
NR 8040
Series
C3225X5R0J226M
C2012X5R0J106M
LMK325BJ226ML
JMK316BJ226ML
JMK212BJ106ML
ECJ4YB1A106M
ECJ4YB0J226M
Inductance (μH) DCR (mΩ) Current Rating (mA) Dimensions (mm)
Table 2. Capacitors for C
V
Output capacitor must be
near RT8055
Part No.
OUT
R
L1
Figure 4. PCB Layout Guide
OSC
Connect the FB pin directly to feedback resistors. The
resistor divider must be connected between V
2
C
SHDN/RT
OUT
PGND
Table 1. Inductors
GND
LX
LX
1
2
3
4
5
GND
11
C
IN
C
and GND as closer as possible
10
9
9
8
7
6
IN
COMP
FB
VDD
PVDD
PVDD
must be placed between V
Capacitance (μF)
IN
and C
R
C
COMP
COMP
22
10
22
10
22
22
10
OUT
OUT
R2
7800
and GND.
R1
V
DD
OUT
V
IN
C
F
DS8055-03 March 2011
Case Size
1210
0805
1210
1210
1210
1206
0805
8x8x4