RT8202AGQW Richtek USA Inc, RT8202AGQW Datasheet - Page 5

• 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: -

DS8202/A/B-04 March 2011
FB Reference Voltage
FB Input Bias Current
Output Voltage Range
On-Time
Minimum Off-Time
V
Resistance
Current Sensing
ILIM Source Current
Current Comparator Offset
Current Limit Setting Range R
Zero Crossing Threshold
Fault Protection
Current Limit Sense
Voltage
Output UV Threshold
OVP Threshold
OV Fault Delay
VDD UVLO Threshold
Soft-Start Ramp Time
UV Blank Time
Thermal Shutdown
Thermal Shutdown
Hysteresis
Driver On-Resistance
UGATE Driver Pull Up
UGATE Driver Sink
LGATE Driver Pull Up
LGATE Driver Pull Down
UGATE Driver Source/Sink
Current
LGATE Driver Source
Current
LGATE Driver Sink Current
Dead Time
OUT
Shutdown Discharge
Parameter
V
V
V
R
Symbol
FB
OUT
ILIM
RILIM
UGATEsk
V
FB = 0.75V
V
EN/DEM = GND
LGATE = High
GND − OC
GND − PHASE, EN/DEM = 5V
GND − PHASE, R
GND − PHASE, R
With respect to error comparator
threshold
FB forced above OV threshold
Rising edge, Hysteresis = 20mV,
PWM disabled below this level
From EN high to internal V
0.71V (0 95%)
From EN signal going high
BOOT − PHASE = 5V
BOOT − PHASE = 5V
LGATE, High State (Source)
LGATE, Low State (Sink)
UGATE − PHASE = 2.5V,
BOOT − PHASE = 5V
LGATE forced to 2.5V
LGATE forced to 2.5V
LGATE Rising (PHASE = 1.5V)
UGATE Rising
DD
IN
= 15V, V
= 4.5 to 5.5V
Test Conditions
OUT
= 1.25V, R
ILIM
ILIM
= 2.5k
= 10k
REF
TON
reach
= 1M
0.742
0.75
Min
267
250
−10
−10
170
2.5
4.1
−1
18
35
60
10
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RT8202/A/B
0.75
1.35
Typ
334
400
200
155
0.1
4.3
3.1
1.5
1.5
1.5
0.6
20
20
50
70
15
20
10
30
30
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1
1
3
To be continued
0.758
www.richtek.com
Max
401
550
230
3.3
4.5
2.5
22
10
10
65
80
20
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1
5
5
5
5
Unit
mV
mV
mV
mV
μA
μA
kΩ
ms
ms
°C
°C
ns
ns
μs
ns
%
%
Ω
Ω
Ω
Ω
Ω
V
V
V
A
A
A
5