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SC1461EVB
Datasheet
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Semtech Corporation SC1461EVB, SC1461ISKTR Datasheet

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POWER MANAGEMENT
Description
SC1461
Multi Mode Capless ChargeTM Pump
Features
The SC1461 is a versatile charge pump designed for use in battery operated power supply applications. A simple, low current boost circuit can be implemented without costly inductors or capacitors. Internal MOSFETs and control circuitry eliminate the need for costly board space and design time. The small device footprint allows for compact circuit design.
TM
The SC1461 is a Capless
charge pump for applications that require up to 8mA of output current. Three modes of output voltage can be programmed via the ADJ pin.
Modes include:
V
= (1.32*VIN) ± 4% @ 7mA of output current
O
VO = (1.515 * VIN) ± 4% @ 4mA of output current
and the adjustable mode where an external resistor divider determines the output voltage.
The SC1461 is packaged in a 5 lead SOT-23 package.
K Small size - 5 pin SOT-23 package K 4% voltage accuracy K 65uA typ. quiescent current K User selectable output voltages of 1.515* V
1.32 * V
, or adjustable output
IN
,
IN
K All specifications rated over full temperature range
(-40°C to 85°C)
K PDA Power Supplies K Notebook Power Supplies K Peripheral Card Supplies K Industrial Power Supplies K High Density DC/DC Conversion
Typical Application Circuit
Vin = 3.3V
Cin
0.22uF
SC1461
5
Vin
Disable
1
GND
2
Vo = 5.0V Vo = 3.3V
4
Vo
ADJ
3
Cout 47nF
Vin = 2.5V
Cin
0.22uF
SC1461
5
Vin
Disable
1
2
GND
4
3
Vo
ADJ
Vin
Cout 47nF
Cout 47nF
R2
SC1461
4
Vo
ADJ
312
 
GND
1R
5
Vin
Disable
 
+
2R1R
VinVo
Cin
0.22uF
R1
+××=
1Vin03.1Vo
Revision 1, December 2000
1
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Absolute Maximum Ratings
retemaraPlobmySmumixaMstinU
SC1461
egatloVylppuSV
NI
egatloVtuptuOOV6+ot3.0-V
tneibmAotnoitcnuJecnatsiseRlamrehT
erutarepmeTgnitarepOT
egnaRerutarepmeTT
erutarepmeTegarotST
sdnoceS01)gniredloS(erutarepmeTdaeLT
θ
AJ
A
J
GTS
L
Electrical Characteristics
Un less specifi ed: 2.2 5V ≤ Vin ≤ 3.63V, 0 ≤ Io ≤ 8mA, Cin = 0.22uF, Cout = 47nF, Ta = -40 to 85 °C
retemaraPlobmySsnoitidnoCniMpyTxaMstinU
egatloVylppuStupnIV
tnerruCylppuStupnII
egatloVtuptuOV
)1(
)kp-kp(elppiRtuptuO
tnerruCtuptuOI
)1(
ycneiciffE
)2(
ycneuqerFrotallicsO
NI
NI
O
V
R
O
η
CSOV=JDA
,DNG=ELBASID,JDA
I
O
V,Am0=
V3.3=
NI
V=ELBASID,DNG=JDA
I
O
V=JDA
NI
V=JDA
NI
V=JDA
NI
V=JDA
NI
NI
V,Am0=
I
O
V3.3=
NI
I,DNG=ELBASID,JDA
≤ Am44-NIVX515.14
O
I,DNG=ELBASID,
O
I,DNG=ELBASID,
O
V,DNG=ELBASID,JDA
NI
Am7=
V,DNG=ELBASID,JDA
NI
4+ot3.0-V
014W/C°
58+ot04-C°
521+ot04-C°
051ot56-C°
003C°
52.236.3V
56001Aµ
NI
1.01
%
≤ Am74-NIVx23.14 ≤ Am705Vm
DNG=ELBASID,V5.2=78Am
V3.3=47 Am
DNG=ELBASID,V5.2=
05%
DNG=ELBASID,V5.2=21zHM
V3.3=5.31
D
t
NO
IHSI
OLSI
ELBASID
)1(
nO-nruT
egatloVdlohserhTelbasiDD
tnerrucelbasiDI
tanoitalugeRotemiT
V=JDA
NI
I
O
C,Am7=
TUO
DNG=ELBASID,V5.2=
Fn74=
5.9.0V
V0=elbasiD101Aµ
NOTES:
(1) All electrical characteri stics are for the application circuit on page 1 . (2) Guaranteed by design. (3) This device is ESD sen si tive. Use of stan dard ESD handling precautions i s required.
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SC1461
Pin Configuration
(Top View)
5 Lead SOT-23
Pin Descriptions
#niPemaNniPnoitcnuFniP
1ELBASID
2DNG.dnuorG
3JDA
Vdleiy
O
V*23.1=
NI
.stiucriCsnoitacilppAeeS
Ordering Information
)1(
eciveD
RTKSI1641CS32-TOS-5
BVE1641CSdraoBnoitaulavE
Note: (1) Only available i n tape and reel packaging. A reel contains 3000 devices.
VotdellupyllanretnisinipelbasiD
NI
+××=
1Vin03.1Vo
 
.tuptuoehtelbanelliwnipsihtgnidnuorG.delbasid
dleiylliwnipsihtgnidnuorG.nipnoitcelesedoMV
o
1R
 
+
2R1R
V*515.1=
ni
VtadetcennocredividegatlovlanretxenA.
NI
egakcaP
eblliwtuptuoehtdnaedomybdnatsnignitluser
VotnipsihtgnilluP.
lliw
:eveihcalliw
NI
4OV.tuptuoegatloV
5NIV.tupniegatlovylppuS
Block Diagram
Marking Information
Top Mark
1461
Bo tto m Mark
yyww
yyww = Datecode (Example: 9908)
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Typical Characteristics
SC1461
Vout Vs Iout (1.32 Mode, Vin = 2.25V)
3.2 00
3.1 00
3.0 00
2.9 00
2.8 00
Vout (V)
2.7 00
2.6 00
2.5 00
0 00. 0E+0 2. 0E-3 4. 0E-3 6. 0E-3 8. 0E-3
+4%
25°C
-40°C
85° C
-4%
Io ut (A)
Typical Vout vs Iout
1.32 Mode Vin = 2.25V
Vout Vs Iou t (1. 32 Mode, V in = 2.5V)
3.5 00
3.4 00
3.3 00
3.2 00
3.1 00
3.0 00
Vout (V)
2.9 00
2.8 00
2.7 00
2.6 00
2.5 00
000.0E+0 2.0E-3 4.0E-3 6.0E-3 8.0E-3
+4%
25°C
-40°C
85° C
-4%
Iout (A)
Vout Vs Iout (1.32 Mode, Vin = 3.3V)
4.7 00
4.5 0 0
4.3 00
4.1 00
Vout (V)
3.9 00
3.7 00
3.5 00
000.0E+0 2.0E-3 4.0E-3 6.0E-3 8.0E-3
+4% 25°C
-40°C 85° C
-4%
Iout (A)
Typical Vout vs Iout
1.32 Mode Vin = 3.30V
Vo ut Vs Io ut (1 .32 M od e, V in = 3 .6 3V )
5.1 00
4.9 0 0
4.7 00
4.5 0 0
4.3 00
Vo ut ( V)
4.1 00
3.9 00
3.7 00
3.5 00
0 00. 0E+0 2. 0E-3 4. 0E-3 6.0E -3 8. 0E-3
+4%
25°C
-40°C
85° C
-4%
Io ut ( A)
Typical Vout vs Iout
1.32 Mode Vin = 2.50V
Typical Vout vs Iout
1.32 Mode Vin = 3.63V
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Typical Characteristics
SC1461
Vo ut Vs Io ut ( 1.5 15 Mode , Vin = 2.2 5V )
3.7 00
3.5 00
3.3 00
3.1 00
Vo ut ( V)
2.9 00
2.7 00
2.5 00
0 00. 0E+0 2. 0E-3 4. 0E-3 6.0E -3 8. 0E-3
+4%
25°C
-40°C
85° C
-4%
Io ut ( A)
Typical Vout vs Iout
1.515 Mode Vin = 2.25V
Vout Vs Iout (1.515 Mode, Vin = 2.5V)
4.1 00
3.9 00
3.7 00
3.5 00
3.3 00
Vout (V)
3.1 00
2.9 00
2.7 00
2.5 00
0 00. 0E+0 2. 0E-3 4.0E-3 6. 0E-3 8.0E -3
+4%
25°C
-40°C
85° C
-4%
Io ut (A )
Vout Vs Iout (1.515 Mode, Vin = 3.3V)
5.3 00
5.1 00
4.9 0 0
4.7 00
4.5 0 0
4.3 00
Vout (V)
4.1 00
3.9 00
3.7 00
3.5 00
0 00. 0E+0 2. 0E-3 4.0E -3 6. 0E-3 8. 0E-3
+4% 25°C
-40°C 85° C
-4%
Io ut (A)
Typical Vout vs Iout
1.515 Mode Vin = 3.30V
V o ut Vs Iou t (1.5 15 Mode , Vin = 3.6 3V)
6.0 00
5.5 0 0
5.0 00
Vo ut (V)
4.5 0 0
4.0 00
3.5 00
000.0E+0 2.0E-3 4.0E-3 6.0E-3 8.0E-3
+4%
25°C
-40°C
85° C
-4%
Io ut (A)
Typical Vout vs Iout
1.515 Mode Vin = 2.50V
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Typical Vout vs Iout
1.515 Mode Vin = 3.63V
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Typical Characteristics
SC1461
Vout V s Iout (1.42 Adjust Mode, Vin = 2.25V)
3.4 00
3.3 00
3.2 00
3.1 00
3.0 00
2.9 00
Vout (V)
2.8 00
2.7 00
2.6 00
2.5 00
0 00. 0E+0 2. 0E-3 4.0E -3 6. 0E-3 8. 0E-3
+4%
25°C
-40°C
85° C
-4%
Io ut (A)
Typical Vout vs Iout
Adjust Mode = 1.42 * Vin Vin = 2.25V
Vout Vs Iout (1.42 Adjust Mode, V in = 2.5V)
3.9 00
3.7 00
3.5 00
3.3 00
3.1 00
Vout (V)
2.9 00
2.7 00
2.5 00
000.0E+0 2.0E-3 4.0E-3 6.0E-3 8.0E-3
+4%
25°C
-40°C
85° C
-4%
Iout (A)
Vo ut Vs Iout (1.42 Adjust Mode, Vin = 3.3V)
5.1 00
4.9 0 0
4.7 00
4.5 0 0
4.3 00
Vout (V)
4.1 00
3.9 00
3.7 00
3.5 00
0 00. 0E+0 2. 0E-3 4.0E -3 6. 0E-3 8. 0E-3
+4%
25°C
-40°C
85° C
-4%
Io ut (A)
Typical Vout vs Iout
Adjust Mode = 1.42 * Vin Vin = 3.30V
Vo ut Vs Iout (1 .4 2 A djust M ode , Vin = 3. 63V )
5.5 0 0
5.3 00
5.1 00
4.9 0 0
4.7 00
4.5 0 0
Vout (V)
4.3 00
4.1 00
3.9 00
3.7 00
3.5 00
0 00. 0E+0 2. 0E-3 4. 0E-3 6. 0E-3 8. 0E-3
+4%
25°C
-40°C
85° C
-4%
Io ut ( A)
Typical Vout vs Iout
Adjust Mode = 1.42 * Vin Vin = 2.50V
Typical Vout vs Iout
Adjust Mode = 1.42 * Vin Vin = 3.63V
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)
)
)
Typical Characteristics
SC1461
Iin vs Vin (Iout = 0mA, Ta =25° C)
0.060
0.050
0.040
0.030
Iin (mA
0.020
0.010
0.000
2.25 2.75 3.25
Vin (V)
Typical Iin vs Vin Iout = 0mA Ta = 25°C
Iin vs Vin (Iout = 0mA, Ta =85° C)
0.060
0.050
1.515 Mode 1.32 Mode
Iin vs Vin (Iout = 0mA , Ta =-4 0° C)
0.050
0.045
0.040
0.035
0.030
0.025
Iin (mA
0.020
0.015
0.010
0.005
0.000
2.25 2.75 3.25
Vin (V)
Typical Iin vs Vin Iout = 0mA Ta = -40°C
1.515 Mode 1.32 Mod e
0.040
0.030
Iin (mA
0.020
0.010
0.000
2.25 2.75 3.25
Typical Iin vs Vin Iout = 0mA Ta = 85°C
1.515 Mode 1.32 Mod e
Vin (V)
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Outline Drawing - SOT-23-5L
SC1461
Land Pattern - SOT-23-5L
Contact Information
Semtech Corporation
Power Management Products Division
652 Mitchell Rd., Newbury Park, CA 91320
Phone: (805)498-2111 FAX (805)498-3804
8 2000 Semtech Corp.
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