RT8202AGQW Richtek USA Inc, RT8202AGQW Datasheet - Page 2

• Manufacturer Part Number: RT8202AGQW
• Description: IC PWM CTRLR SYNC BUCK 16WQFN
• Manufacturer: Richtek USA Inc

Specifications of RT8202AGQW

• Pwm Type: Current Mode
• Number Of Outputs: 1
• Voltage - Supply: 4.5 V ~ 5.5 V
• Buck: Yes
• Boost: No
• Flyback: No
• Inverting: No
• Doubler: No
• Divider: No
• Cuk: No
• Isolated: No
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 16-WFQFN Exposed Pad
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Duty Cycle: -

RT8202/A/B
Functional Pin Description
www.richtek.com
2
Typical Application Circuit
Exposed Pad
RT8202/A
5, 14
(17)
10
11
12
13
15
16
6,
1
2
3
4
7
8
9
Pin No.
Exposed Pad
RT8202B
(15)
10
11
12
13
14
7,
--
3
4
5
6
8
9
1
2
Pin Name
VOUT
VDD
FB
PGOOD
NC
GND
PGND
LGATE
VDDP
OC
PHASE
UGATE
BOOT
EN/DEM
TON
VOUT Sense Input. Connect to the output of PWM converter. VOUT is an
input of the PWM controller.
Analog Supply Voltage Input for the internal analog integrated circuit.
Bypass to GND with a 1μF ceramic capacitor.
VOUT Feedback Input. Connect FB to a resistor voltage divider from
VOUT to GND to adjust the output from 0.75V to 3.3V.
Power Good Signal Open-Drain Output of PWM Converter. This pin will
be pulled high when the output voltage is within the target range.
No Internal Connection.
Ground for Analog Circuitry. The exposed pad must be soldered to a large
PCB and connected to GND for maximum power dissipation.
Power Ground.
Low side N-MOSFET Gate-Drive Output for PWM. This pin swings
between GND and VDDP.
VDDP is the gate driver supply for the external MOSFETs. Bypass to
GND with a 1μF ceramic capacitor.
PWM Current Limit Setting and sense. Connect a resistor between OC to
PHASE for current limit setting.
Inductor Connection. This pin is not only the zero-current-sense input for
the PWM converter, but also the UGATE high side gate driver return.
High Side N-MOSFET Floating Gate-Driver Output for the PWM
converter. This pin swings between PHASE and BOOT.
Boost Capacitor Connection for PWM Converter. Connect an external
ceramic capacitor to PHASE and an external diode to VDDP.
PWM Enable and Operation Mode Selection Input. Connect to VDD for
diode-emulation mode, connect to GND for shutdown mode and floating
the pin for CCM mode.
VIN Sense Input. Connect to VIN through a resistor. TON is an input of
the PWM controller.
Pin Function
DS8202/A/B-04 March 2011