TOKO TK65130MTL, TK65133MTL, TK65127MTL Datasheet
TK651xx
V
IN
GND
SW
LOI
V
OUT
CONTROL
CIRCUIT
OSCILLATOR
Vref UVLO
20P
STEP-UP VOLTAGE CONVERTER WITH VOLTAGE MONITOR
FEATURES
■ Guaranteed 0.9 V Operation
■ Very Low Quiescent Current
■ Internal Bandgap Reference
■ High Efficiency MOS Switching
■ Low Output Ripple
■ Microprocessor Reset Output
■ Laser-Trimmed Output Voltage
■ Laser-Trimmed Oscillator
■ Undervoltage Lockout
■ Regulation by Pulse Burst Modulation (PBM)
DESCRIPTION
The TK651xx low power step-up DC-DC converter is
designed for portable battery powered systems, capable
of operating from a single battery cell down to 0.9 V. The
TK651xx provides the power switch and the control circuit
for a boost converter. The converter takes a DC input and
boosts it up to a regulated 2.7, 3.0 or 3.3 V output .
The output voltage is laser-trimmed. A Low Output Indicator
detector (LOI) monitors the output voltage and provides an
active low microprocessor reset signal whenever the
output voltage falls below an internally preset limit. An
internal Undervoltage Lockout (UVLO) circuit is utilized to
prevent the inductor switch from remaining in the “on”
mode when the battery voltage is too low to permit normal
operation. Pulse Burst Modulation (PBM) is used to regulate
the voltage at the V
in which an oscillator signal is gated or not gated to the
switch drive each period. The decision is made just before
the start of each cycle and is based on comparing the
output voltage to an internally-generated bandgap
reference. The decision is latched, so the duty ratio is not
modulated within a cycle. The average duty ratio is
effectively modulated by the “bursting” and skipping of
pin of the IC. PBM is the process
OUT
APPLICATIONS
■ Battery Powered Systems
■ Cellular Telephones
■ Pagers
■ Personal Communications Equipment
■ Portable Instrumentation
■ Portable Consumer Equipment
■ Radio Control Systems
pulses which can be seen at the SW pin of the IC. Special
care should be taken to achieve reliability through the use
of Oxide, double Nitride passivation. The TK651xx is
available in a miniature 6-pin SOT-23L-6 surface mount
package.
Customized levels of accuracy in oscillator frequency and
output voltage are available.
TK651xx
V
IN
GND
SW
BLOCK DIAGRAM
LOI
GND
V
OUT
ORDERING INFORMATION
TK651xxM
Voltage Code
VOLTAGE CODE
27 = 2.7 V
30 = 3.0 V
33 = 3.3 V
January 1999 TOKO, Inc. Page 1
Tape/Reel Code
TAPE/REEL CODE
TL: Tape Left
TK651xx
ABSOLUTE MAXIMUM RATINGS
All Pins Except SW and GND .................................... 6 V
SW Pin ....................................................................... 9 V
Power Dissipation (Note 1) ................................ 400 mW
TK651xx ELECTRICAL CHARACTERISTICS
Over operating temperature range and supply voltage range, unless otherwise specified.
LOBMYSRETEMARAPSNOITIDNOCTSETNIMPYTXAMSTINU
Storage Temperature Range ................... -55 to +150 °C
Operating Temperature Range ...................-20 to +80 °C
Junction Temperature ...........................................150 °C
f
V
∆V
∆V
D
V
CSO
)GER(TUO
)DAOL(TUO
)ENIL(TUO
CSO
IOL
V
TUO
VfonoitalugeRdaoL
VfonoitalugeReniL
ycneuqerFrotallicsOlanretnIV
VfodlohserhTnoitalugeR
TUO
)GER(TUO
)GER(TUO
noitisnarTIOLgniruDT
NI
T
A
V
NI
∆V
NI
rotallicsOfooitaRytuDemit-nOT
A
A
,V3.1=I
TUO
Am0=0738201zHk
C°52=%5-V
,V3.1=I
TUO
Am4ot0=005Vm
V52.0=
C°52=540555%
C°52=%5-78.0 V
TUO
%3+V
02-002Vm
TUO
%4+V
Note 1: Derate at 0.8 mW/oC for operation above TA = 25 oC ambient temperature, when heat conducting copper foil path is maximized on the printed
circuit board. When this is not possible, a derating factor of 1.6 mW/ °C must be used.
GENERAL CIRCUIT
V
IN
I(VIN)
I
B
V
IN
GND GND
L
LOI
300 k
Ω
V
OUTSW
D
I(V
)
OUT
I
OUT
V
OUT
C
Page 2 January 1999 TOKO, Inc.
FINAL TEST CIRCUIT
V
IN
LOI
TK651xx
C
N
10 µF
I
B
V
IN
L = 95 µF
Note: Inductor L: Toko A682AE-014 or equivalent
Diode D: LL101
Capacitors CN:CU:CD: Panasonic TE series,
GND GND
R
1 K
D
S
C
S
220 pF
300 kΩ
V
OUTSW
R
OF
15
++
C
U
10 µF
C
10 µF
I
OUT
V
OUT
D
ECS-TOJY106R
Above is the Final Test Circuit through which each of the production parts must pass. In this test circuit, the part is tested
against the specification limits in the data sheet (the min. and max. values in the Electrical Characteristics) at room
temperature, and is rejected if the tested values are outside the minimum (min.) and maximum (max.) values.
The Bench Test Circuits shown on the following pages are the circuits used most of the time to measure the typical (typ.)
values in the Electrical Characteristics section, and make the Typical Performance graphs.
Note: In measuring the oscillator frequency and the Max I
on the bench, the converter was loaded until “no pulse
OUT
skipping” mode was achieved.
January 1999 TOKO, Inc. Page 3
TK651xx
TK65127 ELECTRICAL CHARACTERISTICS
Over operating temperature range and supply voltage range, unless otherwise specified.
LOBMYSRETEMARAPSNOITIDNOCTSETNIMPYTXAMSTINU
V
NI
I
)Q(B
V(I
)VotnitnerruCtnecseiuQ
NI
V(I
)VotnitnerruCtnecseiuQ
TUO
/∆T
∆f
CSO
V
∆V
TUO
V
∆V
R
FFE)3,2setoN(ycneiciffEretrevnoC
V
VLU
)GER(TUO
/∆T
)IOL(TUO
)NO(WS
egatloVylppuS09.006.1V
V
NI
)3etoN(tnerruCyrettaBdaoLoN
T
A
V
niP
NI
niPVNI,V3.1=I
TUO
VfodlohserhTnoitalugeR
TUO
VfoytilibatSerutarepmeT
V
TUO
V
)IOL(TUO
)IOL(TUO
noitisnarTIOLgniruDV
siseretsyHdlohserhTT
niPWSfoecnatsiser-nOV
egatloVtuokcoLegatlovrednUT
NI
T
A
rotallicsOfoytilibatSerutarepmeTV
NI
T
A
V
)GER(TUO
NI
NI
A
TUO
V
NI
A
V
NI
,V3.1=I
TUO
C°52=
,V3.1=I
TUO
C°52=
TUO
,V3.1=
C°52=65.207.297.2V
,V3.1=I
TUO
,V3.1=TAC°52=42.263.254.2V
C°52=83Vm
≥ V4.20.1
,V3.1=I
TUO
T,V1.1=
A
,Am0=
,Am0=
6548Aµ
5.2102Aµ
,Am0=5.4132Aµ
gnippikSesluPoN
1.0C°/%
,Am0=001C°/mpp
Ω
,Am6=
lioCFD3,Hµ59=L
67%
)4etoN(,C°52=54.097.0V
,C°52=
lioCFD3,Hµ59=L
66.7Am
ImumixaM
I
)XAM(TUO
TUO
)3,1setoN(
Inductor L: Toko A682AE-014 or equivalent
Diode D: LL103A or equivalent
Capacitors CN:CO:CB: Panasonic TE series,
ECS-TOJY106R
I
B
V
IN
R
N
1 K
C
10 µF
L = 95 µH
C
B
10 µF
V
NI
T,V3.1=
A
retrevnoCrof
V
NI
V
NI
T,V1.1=
A
T,V3.1=
A
BENCH TEST CIRCUIT
I(VIN)
V
IN
GND GND
N
C
S
220 pF
R
S
1 K
LOI
300 kΩ
V
OUTIND
I(V
)
OUT
D
C
10 µF
,C°52=
lioCFD3,Hµ59=L
,C°52=
lioC37D,Hµ93=L
,C°52=
lioC37D,Hµ93=L
88.21Am
5.51Am
6.33Am
Note 1: Maximum load current depends on
inductor value and input voltages.
Note 2: Output ripple depends on filter
capacitor values, ESRs and the
inductor value.
Note 3: When using specified Toko inductor
and Schottky diode with VF = 0.45 V
@ 100 mA.
Note 4: Regulation not guaranteed.
I
OUT
V
OUT
O
Page 4 January 1999 TOKO, Inc.
TK65127
BATTERY CURRENT VS.
INPUT VOLTAGE
120
0 .5 1 1.5 2 2.5 3
VIN (V)
I
B
(µA)
100
60
80
40
20
0
TA = 25 °C
NO LOAD
V
(V)
V
(V)
V
(V)
TK651xx
TYPICAL PERFORMANCE CHARACTERISTICS
OSCILLATOR FREQUENCY
TEMPERATURE
95
90
(kHz)
85
OSC
f
80
75
-50 0 50 100
TEMPERATURE (°C)
OUTPUT VOLTAGE
LOAD CURRENT
2.8
L = 95 µH
TOKO P/N: A682AE-014
(3DF SERIES)
TA = 25 °C
2.7
V
2.6
IN
= 0.9 V
1.3 V
OUT
1.1 V
1.6 V
2.5
VS.
VS.
OUTPUT REGULATION VOLTAGE VS.
TEMPERATURE
2.80
2.75
(V)
2.70
OUT(REG)
V
2.65
2.60
-50 0 50 100
TEMPERATURE (°C)
OUTPUT VOLTAGE
2.8
L = 100 µH
TOKO P/N: A636CY-101M
(D73 SERIES)
LOAD CURRENT
TA = 25 °C
2.7
V
2.6
IN
= 0.9 V
1.3 V
OUT
2.5
1.1 V
1.6 V
VS.
2.8
L = 39 µH
TOKO P/N: A636CY-390M
(D73 SERIES)
2.7
2.6
OUT
2.5
OUTPUT VOLTAGE
LOAD CURRENT
TA = 25 °C
V
= 0.9 V 1.3 V
IN
1.1 V 1.6 V
VS.
2.4
1 10 100
EFFICIENCY
90
L = 95 µF
Toko P/N: A682AE-014
(3DF SERIES) SMALL COIL
85
80
75
EFF (%)
70
65
60
0.1 1 10 100
January 1999 TOKO, Inc. Page 5
I
(mA)
OUT
VS.
LOAD CURRENT
1.1 V
VIN = 0.9 V
I
(mA)
OUT
TA = 25 °C
1.3 V
1.6 V
2.4
1 10 100
I
(mA)
OUT
EFFICIENCY
90
L = 100 µF
Toko P/N: 636CY-101M
(D73 SERIES) LARGER COIL
85
VIN = 0.9 V
VS.
LOAD CURRENT
TA = 25 °C
1.1 V
80
75
EFF (%)
70
65
60
0.1 1 10 100
I
(mA)
OUT
1.3 V
1.6 V
2.4
1 10 100
I
(mA)
OUT
MAXIMUM OUTPUT CURRENT VS.
INDUCTOR VALUE (µH)
50
NO PULSE
SKIPPING
MODE
TA = 25 °C
(mA)
40
30
20
OUT(MAX)
I
1.1 V 1.3 V
10
VIN = 0.9 V
0
0 40 80 120 160
INDUCTOR VALUE (µH)
TK651xx
TK65130 ELECTRICAL CHARACTERISTICS
Over operating temperature range and supply voltage range, unless otherwise specified.
LOBMYSRETEMARAPSNOITIDNOCTSETNIMPYTXAMSTINU
V
NI
I
)Q(B
V(I
)VotnitnerruCtnecseiuQ
NI
V(I
)VotnitnerruCtnecseiuQ
TUO
/∆T
∆f
CSO
V
∆V
TUO
V
∆V
R
FFE)3,2setoN(ycneiciffEretrevnoC
V
VLU
)GER(TUO
/∆T
)IOL(TUO
)NO(WS
egatloVylppuS09.005.2V
V
NI
)3etoN(tnerruCyrettaBdaoLoN
T
A
V
niP
NI
niPVNI,V3.1=I
TUO
VfodlohserhTnoitalugeR
TUO
VfoytilibatSerutarepmeT
V
TUO
V
)IOL(TUO
)IOL(TUO
noitisnarTIOLgniruDV
siseretsyHdlohserhTT
niPWSfoecnatsiser-nOV
egatloVtuokcoLegatlovrednUT
NI
T
A
rotallicsOfoytilibatSerutarepmeTV
NI
T
A
V
)GER(TUO
NI
NI
A
TUO
V
NI
A
V
NI
,V3.1=I
TUO
C°52=
,V3.1=I
TUO
C°52=
TUO
,V3.1=
C°52=58.200.301.3V
,V3.1=I
TUO
,V3.1=TAC°52=84.228.207.2V
C°52=06Vm
V4.20.1
,V3.1=I
TUO
T,V1.1=
A
,Am0=
,Am0=
97111Aµ
0253Aµ
,Am0=2204Aµ
gnippikSesluPoN
1.0C°/%
,Am0=001C°/mpp
Ω
,Am6=
lioCFD3,Hµ59=L
77%
)4etoN(,C°52=54.097.0V
,C°52=
lioCFD3,Hµ59=L
47.6Am
ImumixaM
I
)XAM(TUO
TUO
)3,1setoN(
Inductor L: Toko A682AE-014 or equivalent
Diode D: LL103A or equivalent
Capacitors CN:CO:CB: Panasonic TE series,
ECS-TOJY106R
I
B
V
IN
V
NI
T,V3.1=
retrevnoCrof
V
NI
V
NI
T,V1.1=
T,V3.1=
BENCH TEST CIRCUIT
I(VIN)
R
N
1 K
C
10 µF
L = 95 µH
C
B
10 µF
V
IN
GND GND
N
C
S
220 pF
R
S
1 K
LOI
300 kΩ
V
OUTIND
I(V
D
A
A
A
OUT
)
lioCFD3,Hµ59=L
C
10 µF
,C°52=
,C°52=
lioC37D,Hµ93=L
,C°52=
lioC37D,Hµ93=L
68.01Am
0.41Am
6.82Am
Note 1: Maximum load current depends on
inductor value and input voltages.
Note 2: Output ripple depends on filter
capacitor values, ESRs and the
inductor value.
Note 3: When using specified Toko inductor
and Schottky diode with VF = 0.45 V
@ 100 mA.
Note 4: Regulation not guaranteed.
I
OUT
V
OUT
O
Page 6 January 1999 TOKO, Inc.
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