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R2A20101BM/NP Datasheet(PDF) 4 Page - Renesas Technology Corp

Part # R2A20101BM/NP
Description  Monolithic Synchronous Step-Down DC/DC Converter
PDF  10 Pages
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Manufacturer  RENESAS [Renesas Technology Corp]
Direct Link  http://www.renesas.com
Logo RENESAS - Renesas Technology Corp

R2A20101BM/NP Datasheet(HTML) 4 Page - Renesas Technology Corp

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R2A20101BM/NP
REJ03D0790-0300 Rev.3.00 May 14, 2008
Page 4 of 9
Electrical Characteristics
(Ta = 25°C, Vin = 3.6 V, ON/
OFF = Vin, unless otherwise specified.)
Item
Symbol
Min
Typ
Max
Unit
Test Conditions
Input voltage range
Vin
2.5
—
5.5
V
UVL threshold high
Vuvl-Hi
2.0
2.3
2.5
V
VFB = CRFB = GND,
Vin = rising
UVL hysteresis
Vuvl-Hys
0.15
0.22
0.29
V
Quiescent supply current
Iss
20
45
80
µA
Shutdown supply current
Ishdn
—
0.0
1.0
µA
ON/
OFF = 0V
Reference voltage
Vref
0.485
0.500
0.515
V
Vref line regulation
dVref/dVin
(–0.4)
0.1
(0)
%/V
Vin = 2.5 to 5.5V
Vref temperature stability
dVref/dTa
—
(
±100)
—
ppm/°C
Ta = –40 to +85°C
VREF sink current
Ivref-sink
1.3
3.7
8.0
µA
Vref = 2.5V
VREF source current
Ivref-source
0.3
0.9
2.0
µA
Vref = 0V
VFB leakage current
Ileak-VFB
–1
0
+1
µA
VFB = 1/2
× Vin
Pch FET on resistance
Ron-Pch
—
0.30
0.50
Ω
VFB = CRFB = 0V,
ILX = –100mA
Nch FET on resistance
Ron-Nch
—
0.14
0.25
Ω
VFB = CRFB = Vin,
ILX = 100mA
Pch FET leakage current
Ileak-Pch
—
—
1.0
µA
ON/
OFF = 0V, LX = 0V
Nch FET leakage current
Ileak-Nch
—
—
1.0
µA
ON/
OFF = 0V, LX = Vin
Peak current limit
Ipeak-Limit
0.7
—
—
A
ON/
OFF threshold high
Von/off-Hi
1.0
1.45
1.85
V
ON/
OFF = rising
ON/
OFF threshold low
Von/off-Lo
0.75
1.24
1.65
V
ON/
OFF = falling
ON/
OFF leakage current
Ileak-on/off
–1
0
+1
µA
ON/
OFF = Vin
ON/
OFF input current
Iinput-on/off
—
1.4
5
µA
ON/
OFF = 0.9V
Switching frequency
fsw
Adjustable by external Ccf1, Rcf1, Rcf2
Hz
Soft start time
tss
56
× Rcf1/(Rcf1 + Rcf2) × Vout
µs
Power good threshold
Vth-PGood
(–15)
–10
(–5)
%
Vref = 0.5V
Power good VOL
Ipg-VOL
20
—
—
µA
PWGD = 0.2V, VFB = 0V
Power good VOH
Ipg-VOH
–10
—
—
µA
PWGD = 3.4V, VFB = 0.5V
Output voltage load regulation
dVout/dIout
—
±0.7
—
%/A
L = 2.2
µH, Vout = 1.8V,
Iout = 0 to 650mA
Note:
( ) is design spec.



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