RICOH R1250VXX1A

Negative Output Charge Pump Regulator
NO. EA-076-0204
OUTLINE
!"#$!
!!$!%!! !!!!$#$!$!&'
(%"%!!#!#%!# !%#
' !& !& !# ! ! % )
% !'
!%$*$!!&& #
%
&!%!!& +!$!&
'
*%",-*.,-("/0#& %"
!'
FEATURES
• ''''''''''''''''''''' .'
1'
#111)'234#
!15'
0
• !&'''''' 65'7.
1'
#111)'234#
!15'
#"1 8 0
69'7.
1'
#111)'234#
!15'
#"1 0
• !'''''''''''''''''''''' $$%'
% '
)'
!'
• %"
! ''''''''' 

:'
.
!1)'
'-
0
:'2
:'
.
!1'2
'
0
• !!4+& '''''''''''' &'-*;<
• (!4.=>?0
• ,* ''''''''''''''''''''''''''''''''' ,-
APPLICATIONS
• ,$%@*@'
• ,$%!
+ &$+ '
• ,$%,!@@A'
• ,$%!!! '
• >!$% !!!!!'
1
R1250Vxx1A
BLOCK DIAGRAM
VIN
8
CP+
CP-
1
3
SW1
SW3
SW2
SW4
2
GND
7
VOUT
6
Vref
RO
OSC
RPU
CE
4
Vref
PIN CONFIGURATION
TSSOP8
CP+
1
8
VIN
GND
2
7
VOUT
C P-
3
6
Vref
CE
4
5
NC
PACKAGE DIMENSION
1
2
3
4
2
8
7
6
5
R1250Vxx1A
PIN DESCRIPTION
Pin No.
Symbol
Description
BA@
B,
5
.%, 0A,$!&,
)
CC
(
A
A,
D
%
,%%
!
2
,%A!
-
.%, 0,,$!&,
(!,.=>?0
,$!&,
*Note1 Vref is just a monitoring pin, therefore remain open. Do not connect any load. Refer to Technical Notes.
ABSOLUTE MAXIMUM RATINGS
.BA@1
0
Symbol
Item
Rating
Unit
'52'
!&
!
CC
( ,"
!
'5
:'5
,"
!
'5
:'5
%
%,
!
'5
:'5
,"
!
:'5
,
!
:'5
"
,
,$@
)9
E
):-
°
:
°
*Note1: Power dissipation is specified under the specified condition.
Conditions;
Evaluation Board Dimensions: 50mm × 50mm × 1.6mm
Material: Glass Epoxy (FR-4)
Reverse side of the evaluation board: Plane Copper
Surface of the evaluation board: Land pattern and Wiring
3
R1250Vxx1A
SELECTION GUIDE
!&%"!F+'
! $ $!$G
↑ ↑ ↑
Code
Contents
!
H!!%
!
$$%'
%'
)'
!'
4
@%&%(!H
.%0H=>?&
@%,*&
(H(!1
R1250Vxx1A
ELECTRICAL CHARACTERISTICS
.I!$#
1'
#1°##1 )'2340
R1250Vxx1A
Symbol
Item
"
!
"
!&
"
$
Conditions
!1'2
'
'2
!1)'
'-
|
|
H#
%"!%
!
"12 %
!
%
∆
8
>!
∆"
%
!!4+&
∆%8∆
(=;?"
!
(=>?"
!
(,!!
*Note1
'D
'
5')
5'
'2
'2
)'
5'
'-
5'
'
'
')
'
×'9
×'
'9
'
×'9D
×')
5')
5'
×'92
×'5
)'
5'
×'92
×'5
')
'
×'--
×'
'9
'
×'-9
×'
5')
5'
×'9
×'9
)'
5'
×'9
×'

"1 ')
'
"1 2 )'
'
5-
-
$
BA@
5
*;<
*;<8
°
7
'
'D-
3
8
±'
>
'2
%%
!!@&&!
'
'9
'
!!4+&
@&
Unit
'5
A!
4+&
Max.
'
!%
"1 Typ.
')
'
H$#%"
"1 8 Min.
'
'
5'
Ω
*Ω
Refer to Test Circuit 1.
*Note2: Refer to Test Circuit 6.
*Note3: Do not connect ant load. Refer to Technical Notes.
*Use Ceramic Capacitors with low ESR. Capacitors with high ESR could have bad effect on the performance of this IC.
5
R1250Vxx1A
TYPICAL CHARACTERISTICS
1)
Supply Current at no load vs. Input Voltage
2)
Supply Current at no load vs. Temperature
R1250Vxx1A
R1250Vxx1A
2.5
-4.0V Output
2.000
-3.0V Output
1.500
1.000
-2.0V Output
0.500
0.000
2.5
3)
Supply Current at no load ISS2 (mA)
Supply Current at no load ISS2 (mA)
2.500
3.0
3.5
4.0
4.5
Input Voltage VIN (V)
5.0
1.5
1.0
4)
-3.0V Output
-2.0V Output
0.5
0.0
-50
5.5
Input Current vs. Output Load Current
-4.0V Output
2.0
-25
0
25
50
Temperature Topt (°C)
75
100
Efficiency vs. Load Current
R1250V301A
R1250Vxx1A
100
120
-4.0V Output
80
Efficiency η (%)
Input Current IIN (mA)
100
80
60
40
-2.0V Output
40
-3.0V Output
20
20
VIN=lOutputl+1V
0
0
0
5)
60
20
40
60
80
100
Output Load Current IOUT (mA)
0
120
20
Oscillator Frequency vs. Input Voltage
6)
R1250V201A
80
100
120
R1250V201A
300
310
Oscillator Frequency fosc (kHz)
Oscillator Frequency fosc (kHz)
6
60
Oscillator Frequency vs. Temperature
320
300
290
280
270
260
250
240
2.5
40
Output Load Current IOUT (mA)
3
3.5
4
4.5
Input Voltage VIN (V)
5
5.5
298
296
294
292
290
288
286
284
282
280
-50
-25
0
25
50
Temperature Topt (°C)
75
100
R1250Vxx1A
Output Voltage vs. Output Load Current
R1250V201A
R1250V201A
-1.5
-1.9
Output Voltage VOUT (V)
Output Voltage VOUT (V)
-1.6
-2
VIN=5.0V
25°C
50°C
85°C
85°C
-1.7
50°C
-1.8
25°C
-1.9
VIN=3.0V
-2
-2.1
-2.2
-2.1
0
20
40
60
80
100
Output Load Current IOUT (mA)
0
120
R1250V301A
20
40
60
80
100
Output Load Current IOUT (mA)
R1250V301A
Output Voltage VOUT (V)
-2.6
Output Voltage VOUT (V)
120
-2.5
-2.9
-3
VIN=5.0V
25°C 50°C 85°C
85°C
-2.7
50°C
-2.8
25°C
-2.9
-3
VIN=4.0V
-3.1
-3.2
-3.1
0
20
40
60
80
100
Output Load Current IOUT (mA)
120
0
20
40
60
80
100
Output Load Current IOUT (mA)
120
R1250V301A
-3.5
85°C
-3.6
Output Voltage VOUT (V)
7)
50°C
-3.7
25°C
-3.8
-3.9
-4
VIN=5.0V
-4.1
-4.2
0
20
40
60
80
100
Output Voltage Load Current IOUT (mA)
120
7
R1250Vxx1A
8)
Output Voltage vs. Temperature
R1250V201A
R1250V301A
-2.99
-1.98
Output Voltage VOUT (V)
Output Voltage VOUT (V)
-3.00
-1.99
-2.00
-2.01
-3.01
-3.02
-3.03
-3.03
-2.02
-50
-25
0
25
50
Temperature Topt (°C)
75
100
75
100
-3.05
-50
-25
0
25
50
Temperature Topt (°C)
75
100
R1250V401A
-3.98
Output Voltage VOUT (V)
-3.99
-4.00
-4.01
-4.02
-4.03
-4.04
-4.05
-4.06
-50
9)
-25
0
25
50
Temperature Topt (°C)
Output Voltage Waveform
I!$#%!!$G
!H
5
1'
111)'234
-3.00V
JE1;<
100mV
1.00µs
8
"1 R1250Vxx1A
"1 -3.00V
100mV
1.00µs
"1 -3.00V
100mV
1.00µs
TEST CIRCUITS
0!&
0&!0#0
50&!50#)0#20#-0
)0&!0#D0
0&!90
D0&
1)
Test Circuit 1
ISS-P
1.CP+
8.VIN
2.GND
7.VOUT
3.CP-
6.Vref
4.CE
5.NC
A
ISS-N
A
5.5V
Set Output Voltage+0.2V
K@%L"1",:"A
(*) To stabilize voltage, a few µF bypass capacitors are applied to VOUT pin and VIN pin.
9
R1250Vxx1A
2)
Test Circuit 2
ISS2
1.CP+
8.VIN
2.GND
7.VOUT
3.CP-
6.Vref
4.CE
5.NC
1.CP+
8.VIN
2.GND
7.VOUT
3.CP-
6.Vref
4.CE
5.NC
A
4.7µF
3)
4.7µF
4.7µF
Test Circuit 3
IIN
A
4.7µF
V
4.7µF
IOUT
K@%Lη.M
M×"08.
×"0×.70
4)
Test Circuit 4
Oscilloscope
1.CP+
8.VIN
2.GND
7.VOUT
3.CP-
6.Vref
4.CE
5.NC
(*) To stabilize voltage, a few µF bypass capacitor is applied to VIN pin.
10
4.7µF
R1250Vxx1A
5)
Test Circuit 5
1.CP+
8.VIN
2.GND
7.VOUT
3.CP-
6.Vref
4.CE
5.NC
IIN
A
4.7µF
4.7µF
4.7µF
5.0V
IOUT
Oscilloscope
6)
BW:20MHz
Test Circuit 6
1.CP+
8.VIN
2.GND
7.VOUT
3.CP-
6.Vref
4.CE
5.NC
A
7.5V
TYPICAL APPLICATION
CIN
4.7µF
CP
4.7µF
CP+
VIN
GND
VOUT
CP-
Vref
CE
NC
Output
Open
COUT
4.7µF
(*) Vref pin should not be wired. Refer to Technical Notes.
11
R1250Vxx1A
OPERATION
1)
Basic Operation
*EE)A44&!*&!!!.0
$%%+&# $'
!%*!$
!%
!.
%1

0!%# [email protected]
0!!&!! !%'
J&# %E5!!$!
!*
=
?!!'
2)
Status of Internal Circuits at Standby mode and Standby Current
& #
*!%$!$H
VIN
CIN
ROUT
CP
COUT
RO
up to 5kΩ
VOUT
R1250Vxx1A
E&& $"#%!!$NG
.0 "%& !!!*$!!#!*%!'
.0 J!!!%* !!#%% & %
&$'
.50 !!&!!$*ΩBA@' =τ?%.%%0%
!!%!!$H
τ≅.O*ΩP0×.H!0
.)0 >!44&!&$"%!!$
'"% !&%!$
=44?#!!!%
$!!
!&
'%!$!!:'5
.! '0#
" *$'
3)
Ripple Voltage
!!%$% !&!!%!!$H
!O P≅'×."O P:!&!O P08.!!4+&H-O;<P0
8O4P
!&!O P≅!&O P
12
R1250Vxx1A
4)
Power Consumption
,$ !!%"!!%!!$H
EO EP≅.
O
PM
!M0×."O P0
TECHNICAL NOTES
"#%!!$!'
0
,%%!"'
0
I$!$+!.(0%##'$!( *
"F% $'
50
*$%BA@#
## '; !%
!%"'
)0
E"$!!#%'
0
J!!&#
%%! %,J'@ *$'
D0
>&!$
#%44%"%
"# *
!!!'"%!!!&:'5
#$
! #"!*'
13