RT8023GQW Richtek USA Inc, RT8023GQW Datasheet - Page 3

• Manufacturer Part Number: RT8023GQW
• Description: IC CONV STP-DWN W/2 LDO 24WQFN
• Manufacturer: Richtek USA Inc

Specifications of RT8023GQW

• Topology: Step-Down (Buck) Synchronous (1), Linear (LDO) (2)
• Function: Any Function
• Number Of Outputs: 3
• Frequency - Switching: 1.2MHz
• Voltage/current - Output 1: 0.8 V ~ 5 V, 1.5A
• Voltage/current - Output 2: 0.8 V ~ 5 V, 700mA
• Voltage/current - Output 3: 0.8 V ~ 5 V, 350mA
• W/led Driver: No
• W/supervisor: No
• W/sequencer: Yes
• Voltage - Supply: 2.4 V ~ 5.5 V
• Operating Temperature: -40°C ~ 85°C
• Mounting Type: Surface Mount
• Package / Case: 24-WFQFN Exposed Pad
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

Functional Pin Description
DS8023-02 February 2011
25 (Exposed Pad)
7, 10, 22
Pin No.
3, 4, 5
8, 9
11
12
13
14
15
16
17
18
19
20
21
23
24
6,
1
2
PGOOD1
VDD1
VIN1
PGND
PHASE1
VIN2
VOUT2
FB2
PGOOD2
EN2
EN3
PGOOD3
FB3
AGND
VOUT3
VIN3
NC
FB1
EN1
Pin Name
Power Good Indicator of step-down converter. Open-drain logic output that is
opened when the output voltage exceeds 90% of the regulation point.
Signal Input Supply. Decouple this pin to GND with a capacitor. Normally VIN1 is
equal to VDD1. Keep the voltage difference between VDD1 and VIN1 less than
0.5V.
Power Input Supply of step-down converter. Decouple this pin to GND with a
capacitor.
Power Ground. Must be soldered to PCB ground for electrical contact and
optimum thermal performance. The exposed pad must be soldered to a large
PCB and connected to PGND for maximum power dissipation.
Internal Power MOSFET Switches Output of step-down converter. Connect this
pin to the inductor.
Power Input Supply of LDO1. Decouple this pin to GND with a 1Uf or greater
capacitor.
Output of LDO1. A 1Uf or greater output low-ESR ceramic capacitor is required
for stability..
Feedback Pin of LDO1. Receives the feedback voltage from a resistive divider
connected across the output.
Power Good Indicator of LDO1. Open-drain logic output that is opened when the
output voltage exceeds 90% of the regulation point.
LDO1 Enable. A logical high level at this pin enables LDO1, while a logical low
level causes LDO1 to shut down.
LDO2 Enable. A logic high level at this pin enables LDO2, while a logic low level
causes LDO2 to shut down.
Power Good Indicator of LDO2. Open-drain logic output that is opened when the
output voltage exceed 90% of regulation point.
Feedback Pin of LDO2. Receives the feedback voltage from a resistive divider
connected across the output.
Analog Grand. All small-signal of the IC should connect to this ground, which
connects to PGND at one point for away exposed pad.
Output of LDO2. A 1uF or greater output low-ESR ceramic capacitor is required
for stability.
Power Input Supply of LDO2. Decouple this pin to GND with a 1uF or greater
capacitor.
No Internal Connection.
Feedback Pin of step-down converter. Receives the feedback voltage from a
resistive divider connected across the output.
Step-down converter Enable. A logic high level at this pin enables step-down
converter, while a logic low level causes step-down converter to shut down.
Pin Function
RT8023
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