TOSHIBA TCV7107F

TCV7107F
TOSHIBA CMOS Integrated Circuit Silicon Monolithic
TCV7107F
Buck DC-DC Converter IC
The TCV7107F is a single-chip buck DC-DC converter IC.
The TCV7107F contains high-speed and low-on-resistance power
MOSFETs for the main switch and has switchable operation mode,
synchronous and non-synchronous. So the TCV7107F can achieve high
efficiency in the large load current range.
Features

Enables up to 3A (@ VIN = 5V) ／2.5A (@ VIN = 3.3V) of load
current (IOUT) with a minimum of external components.

High efficiency:  = 95% (typ.)
HSON8-P-0505-1.27
Weight: 0.068 g (typ.)
(synchronous mode @VIN = 5V, VOUT = 3.3V, IOUT = 0.7A)

High efficiency in the large load current range is realized because of switchable operation mode, synchronous and
non-synchronous.

Operating voltage range: VIN = 2.7V to 5.6V

Low ON-resistance: RDS (ON) = 0.18Ω (high side)  0.12Ω (low-side) typical (@VIN = 5V, Tj = 25°C)

Oscillation frequency: fOSC = 550kHz (typ.)

Feedback voltage: VFB = 0.8V ± 1% (@Tj = 0 to 85°C)

Uses internal phase compensation to achieve high efficiency with a minimum of external components.

Allows the use of a small surface-mount ceramic capacitor as an output filter capacitor.

Housed in a small surface-mount package (SOP Advance) with a low thermal resistance.
Part Marking
Pin Assignment
Part Number (or abbreviation code)
TCV
7107F
LX
8
EN
MODE
7
6
VFB
5
Lot No.
The dot () on the top surface indicates pin 1.
1
2
3
4
PGND
VIN1
VIN2
SGND
The lot number consists of three digits. The first digit represents the last digit of the year of manufacture, and the
following two digits indicates the week of manufacture between 01 and either 52 or 53.
Manufacturing week code
(The first week of the year is 01; the last week is 52 or 53.)
Manufacturing year code (last digit of the year of manufacture)
This product has a MOS structure and is sensitive to electrostatic discharge. Handle with care.
The product(s) in this document (“Product”) contain functions intended to protect the Product from temporary
small overloads such as minor short-term overcurrent, or overheating. The protective functions do not necessarily
protect Product under all circumstances. When incorporating Product into your system, please design the system to
avoid such overloads upon the Product, and to shut down or otherwise relieve the Product of such overload
conditions immediately upon occurrence. For details, please refer to the notes appearing below in this document and
other documents referenced in this document.
1
2011-11-05
TCV7107F
Ordering Information
Part Number
Shipping
TCV7107F (TE12L, Q)
Embossed tape (3000 units per reel)
Block Diagram
VIN2
VIN1
Current detection
Slope
MODE
Oscillator
Compensation
Under
voltage
lockout
Control
+
-
Driver
Logic
Feedback pin
voltage detection
-
LX
Short-Circuit
Protection
+
0.36V
Error Amplifier
-
VFB
+
Soft
Start
EN
Phase compensation
PGND
Ref.Voltage
(0.8V)
SGND
Pin Description
Pin No.
Symbol
1
PGND
2
VIN1
3
VIN2
4
SGND
5
VFB
Description
Ground pin for the output section
Input pin for the output section
This pin is placed in the standby state if VEN = L. Standby current is 10μA or less.
Input pin for the control section
This pin is placed in the standby state if VEN = L. Standby current is 10μA or less.
Ground pin for the control section
Feedback pin
This input is fed into an internal error amplifier with a reference voltage of 0.8V (typ.).
Mode select pin
When EN ≥ 1.5V (@ VIN = 5V), the synchronous rectifier type is applied and the internal low-side
FET is allowed to operate. Thus TCV7107F operates in PWM mode.
6
MODE
When EN ≤ 0.5V (@ VIN = 5V), the non-synchronous rectifier type is applied and the internal
low-side FET is not allowed to operate. The Schottky barrier diode should be connected between
PGND and LX pins
This pin is pulled up at 1.2μA (typ.) in operation.
Enable pin
7
EN
When EN ≥ 1.5V (@ VIN = 5V), the internal circuitry is allowed to operate and thus enable the
switching operation of the output section. When EN ≤ 0.5V (@ VIN = 5V), the internal circuitry is
disabled, putting the TCV7107F in Standby mode.
This pin has an internal pull-down resistor of approx. 500kΩ.
8
LX
Switch pin
This pin is connected to high-side P-channel MOSFET and low-side N-channel MOSFET.
2
2011-11-05
TCV7107F
Absolute Maximum Ratings (Ta = 25°C) (Note)
Characteristics
Symbol
Rating
Unit
Input pin voltage for the output section (Note 1)
VIN1
−0.3 to 7
V
Input pin voltage for the control section (Note 1)
VIN2
−0.3 to 7
V
Feedback pin voltage
VFB
−0.3 to 7
V
(Note 1)
Enable pin voltage
(Note 1)
VEN
−0.3 to 7
V
Mode select pin voltage
(Note 1)
VMODE
−0.3 to 7
V
VEN-VIN2
VEN – VIN2  0.3
V
VMODE-VIN2
VMODE – VIN2  0.3
V
VLX
−0.3 to 7
V
ILX
±3.5
A
PD
2.2
W
Tjopr
−40 to125
°C
Tj
150
°C
Tstg
−55 to150
°C
VEN – VIN2 voltage difference
VMODE – VIN2 voltage difference
Switch pin voltage
(Note 2)
Switch pin current
Power dissipation
(Note 3)
Operating junction temperature
Junction temperature
(Note 4)
Storage temperature
Thermal Resistance Characteristics
Characteristics
Symbol
Max
Unit
Thermal resistance, junction to ambient
Rth (j-a)
44.6 (Note 3)
°C/W
Thermal resistance, junction to case (Tc=25℃)
Rth (j-c)
4.17
°C/W
Note: Using continuously under heavy loads (e.g. the application of high temperature/current/voltage and the
significant change in temperature, etc.) may cause this product to decrease in the reliability significantly even if
the operating conditions (i.e. operating temperature/current/voltage, etc.) are within the absolute maximum
ratings and the operating ranges.
Please design the appropriate reliability upon reviewing the Toshiba Semiconductor Reliability Handbook
(“Handling Precautions”/“Derating Concept and Methods”) and individual reliability data (i.e. reliability test
report and estimated failure rate, etc)
Note 1: Using this product continuously may cause a decrease in the reliability significantly even if the operating
conditions are within the absolute maximum ratings. Set each pin voltage less than 5.6V taking into
consideration the derating.
Note 2: The switch pin voltage (VLX) doesn’t include the peak voltage generated by TCV7107F’s switching.
A negative voltage generated in dead time is permitted among the switch pin current (ILX).
Note 3:
Glass epoxy board
FR-4
25.4  25.4  0.8
(Unit: mm)
Single-pulse measurement: pulse width t=10(s)
Note 4: The TCV7107F may enter into thermal shutdown at the rated maximum junction temperature. Thermal
design is required to ensure that the rated maximum operating junction temperature, Tjopr, will not be
exceeded.
3
2011-11-05
TCV7107F
Electrical Characteristics (Tj = 25°C, VIN1 = VIN2 = 2.7V to 5.6 V, unless otherwise specified)
Characteristics
Operating input voltage
Operating current
Symbol
VOUT (OPR)
IIN(STBY)1
Standby current
IIN(STBY)2
High-side switch leakage current
EN threshold voltage
EN input current
MODE threshold voltage
MODE input current
Typ.
Max
Unit
―
2.7
―
5.6
V
―
450
680
μA
0.8
―
―
V
―
―
10
―
―
10
VIN1 = VIN2 = VEN = VFB = 5V
VMODE = 5V
VEN = VIN1 = VIN2
VIN1 = VIN2 = 5V , VEN = 0V
VFB = 0.8V
VIN1 = VIN2 = 3.3V, VEN = 0V
VFB = 0.8V
VIN1 = VIN2 = 5V, VEN = 0V
VFB = 0.8V, VLX = 0V
―
―
10
VIH (EN) 1
VIN1 = VIN2 = 5V
1.5
―
―
VIH (EN) 2
VIN1 = VIN2 = 3.3V
1.5
―
―
VIL (EN) 1
VIN1 = VIN2 = 5V
―
―
0.5
VIL (EN) 2
VIN1 = VIN2 = 3.3V
―
―
0.5
IIH (EN) 1
VIN1 = VIN2 = 5V, VEN = 5V
6
―
13
IIH (EN) 2
VIN1 = VIN2 = 3.3V, VEN = 3.3V
4
―
9
―
―
VIL (MODE)
VIN1 = VIN2 = 5V
―
―
0.5
IIH (MODE)
VIN1 = VIN2 = 5V, VEN = 5V
―
-1.2
-2.5
VFB1
VIN1 = VIN2 = 5V, VEN = 5V
Tj = 0 to 85℃
0.792
0.8
0.808
VFB2
VIN1 = VIN2 = 3.3V, VEN = 3.3V
Tj = 0 to 85℃
0.792
0.8
0.808
-1
―
1
―
0.18
―
―
0.21
―
―
―
0.25
―
―
0.3
―
0.12
―
―
0.14
―
―
―
0.18
―
―
0.2
450
550
650
kHz
VIN1 = VIN2 = 5V, IOUT = 0A, Measured
between 0% and 90% points at VOUT.
3
4.5
6
ms
VIN1 = VIN2 = 2.7V to 5.6V
―
―
100
%
TSD
VIN1 = VIN2 = 5V
―
150
―
TSD
VIN1 = VIN2 = 5V
―
15
―
VIN1 = VIN2 = 3.3V , VEN = 3.3V
ILX = - 1A
VIN1 = VIN2 = 5V , VEN = 5V
RDS(ON)(H)3
ILX = - 0.1A , Tj = -40～85℃
VIN1 = VIN2 = 3.3V , VEN = 3.3V
RDS(ON)(H)4
ILX = - 0.1A , Tj = -40～85℃
VIN1 = VIN2 = 5V , VEN = 5V
RDS(ON)(L)1
ILX = - 1A
VIN1 = VIN2 = 3.3V , VEN = 3.3V
RDS(ON)(L)2
ILX = - 1A
VIN1 = VIN2 = 5V , VEN = 5V
RDS(ON)(L)3
ILX = - 0.1A , Tj = -40～85℃
VIN1 = VIN2 = 3.3V , VEN = 3.3V
RDS(ON)(L)4
ILX = - 0.1A , Tj = -40～85℃
Oscillation frequency
fOSC
Internal soft-start time
tSS
Thermal
shutdown (TSD)
Undervoltage
lockout (UVLO)
Detection
temperature
Hysteresis
Dmax
VIN1 = VIN2 = VEN = 5V
μA
Ω
VUV
VEN = VIN1 = VIN2
2.3
2.45
2.6
VUVR
VEN = VIN1 = VIN2
2.4
2.55
2.7
Hysteresis
VUV
VEN = VIN1 = VIN2
―
0.1
―
ILIM1
VIN1 = VIN2 = 4.3V, VOUT = 2V
3.3
4.1
―
ILIM2
VIN1 = VIN2 = 3.3V, VOUT = 2V
2.8
3.7
―
VOLD
VEN = VIN1 = VIN2
―
0.36
―
4
μA
Ω
Recovery voltage
Feedback pin detection voltage
V
V
Detection voltage
LX current limit
μA
1.5
RDS(ON)(H)2
High-side switch duty cycle
V
VIN1 = VIN2 = 5V
VIN1 = VIN2 = 2.7V to 5.6V, VFB = VIN2
VIN1 = VIN2 = 5V , VEN = 5V
RDS(ON)(H)1
ILX = - 1A
Low-side switch on-state resistance
μA
VIH (MODE)
IFB
High-side switch on-state resistance
μA
ILEAK (H)
VFB input voltage
VFB input current
Min
VIN (OPR)
IIN
Output voltage range
Test Condition
°C
V
A
V
2011-11-05
TCV7107F
Note on Electrical Characteristics
The test condition Tj = 25°C means a state where any drifts in electrical characteristics incurred by an increase in
the chip’s junction temperature can be ignored during pulse testing.
Application Circuit Example
Figure 1 shows a typical application circuit using a low-ESR electrolytic or ceramic capacitor for COUT.
VIN
VIN1
VIN2
EN
EN
MODE
CIN
CC
L
LX
TCV7107F
VFB
MODE
VOUT
RFB1
COUT
SGND
PGND
SBD
RFB2
GND
GND
Figure 1 TCV7107F Application Circuit Example
Component values (reference value@ VIN = 5V, VOUT = 3.3V, Ta = 25°C)
CIN: Input filter capacitor = 10μF
(ceramic capacitor: GRM21BB30J106K manufactured by Murata Manufacturing Co., Ltd,
C2012X5R1C106M manufactured by TDK-EPC Corporation.)
COUT: Output filter capacitor = 10μF
(ceramic capacitor: GRM21BB30J106K manufactured by Murata Manufacturing Co., Ltd,
C2012X5R1C106M manufactured by TDK-EPC Corporation.)
RFB1: Output voltage setting resistor = 7.5kΩ
RFB2: Output voltage setting resistor = 2.4kΩ
L: Inductor = 4.7μH (CLF7045T-4R7N manufactured by TDK-EPC Corporation,
D63CB #A916CY-4R7M manufactured by TOKO, INC.)
SBD: Low-side Schottky barrier diode (Schottky barrier diode: CRS30I30A manufactured by Toshiba
Corporation)
CC is a decoupling capacitor of Input pin for the control section.
(Connect it when the circuit operation is unstable due to the board layout or a feature of the CIN.)
When merely synchronous mode (MODE=H) is applied, the SBD can be leaved out.
Examples of Component Values (For Reference Only)
Output Voltage Setting
VOUT
Inductance
L
Input Capacitance
CIN
Output Capacitance
COUT
Feedback Resistor
RFB1
Feedback Resistor
RFB2
1.0 V
4.7 μH
10 μF
40 μF
7.5 kΩ
30 kΩ
1.2 V
4.7 μH
10 μF
30 μF
7.5 kΩ
15 kΩ
1.51 V
4.7 μH
10 μF
30 μF
16 kΩ
18 kΩ
1.8 V
4.7 μH
10 μF
30 μF
15 kΩ
12 kΩ
2.5 V
4.7 μH
10 μF
20 μF
5.1 kΩ
2.4 kΩ
3.3 V
4.7 μH
10 μF
20 μF
7.5 kΩ
2.4 kΩ
Component values need to be adjusted, depending on the TCV7107F’s I/O conditions and the board layout.
5
2011-11-05
TCV7107F
Application Notes
Inductor Selection
The inductance required for inductor L can be calculated as follows:
VIN: Input voltage (V)
VIN  VOUT VOUT
VOUT: Output voltage (V)
············· (1)
L

fOSC  IL
VIN
fOSC: Oscillation frequency = 550 kHz (typ.)
IL: Inductor ripple current (A)
*: Generally, IL should be set to approximately 20% of the maximum output current. Since the maximum
output current of the TCV7107F is 3.0A, IL should be 0.6A or so. The inductor should have a current
rating greater than the peak output current of 3.3A. If the inductor current rating is exceeded, the inductor
becomes saturated, leading to an unstable DC-DC converter operation.
L
VIN  VOUT VOUT

fOSC  IL
VIN

5 V  3.3 V 3.3 V

550kHz  0.6A 5 V
IL
When VIN = 5V and VOUT = 3.3V, the required inductance can be calculated as follows. Be sure to select an
appropriate inductor, taking the input voltage range into account.
IL
0
T
= 3.4μH
V
TON  Τ  OUT
VIN
1
fOSC
Figure 2 Inductor Current Waveform
Setting the Output Voltage
A resistive voltage divider is connected as shown in Figure 3 to set the output voltage; it is given by Equation 2
based on the reference voltage of the error amplifier (0.8V typ.), which is connected to the Feedback pin, VFB.
RFB1 should be up to 30kΩ or so, because an extremely large-value RFB1 incurs a delay due to parasitic
capacitance at the VFB pin. It is recommended that resistors with a precision of ±1% or higher be used for RFB1
and RFB2.
LX
VFB


R
 08 V  1  FB1  ·········· (2)
R
FB2 

VOUT
RFB2 RFB1


R
VOUT  VFB  1  FB1 
R
FB2 

Figure 3 Output Voltage Setting Resistors
Rectifier Selection
If non-synchronous (MODE=L) is selected, Low side MOSFET is always turned off, and this product can be
used as DC-DC converter of the non-synchronous method. While non-synchronous mode is applied, connect the
Schottky barrier diode as a rectifier between the LX and PGND pins. It is recommended CRS30I30A or
equivalent be used as Schottky barrier diode. Power loss of a Schottky barrier diode tends to increase due to an
increased reverse current caused by the rise in ambient temperature and self-heating due to a supplied current.
The rated current should therefore be derated to allow for such conditions in selecting an appropriate diode.
While fixed to synchronous mode (MODE=H), an external rectifier is not necessary.
6
2011-11-05
TCV7107F
Output Filter Capacitor Selection
Use a low-ESR electrolytic or ceramic capacitor as the output filter capacitor. Since a capacitor is generally
sensitive to temperature, choose one with excellent temperature characteristics. When the output voltage
exceeds 2V, the capacitance should be 20μF or greater for applications. Meanwhile 30μF or greater capacitance is
desirable when the output voltage is less than 2V. The capacitance should be set to an optimal value that meets
the system’s ripple voltage requirement and transient load response characteristics. The phase margin tends to
decrease as the output voltage is getting low. Enlarge a capacitance for output flatness when phase margin is
insufficient, or the transient load response characteristics cannot be satisfied. Since the ceramic capacitor has a
very low ESR value, it helps reduce the output ripple voltage; however, because the ceramic capacitor provides
less phase margin, it should be thoroughly evaluated.
Soft-Start Feature
The TCV7107F has a soft-start feature. The soft-start time, tSS, for VOUT defaults to 4.5ms (typ.) internally.
The soft-start feature is activated when the TCV7107F exits the undervoltage lockout (UVLO) state after
power-up and when the voltage at the EN pin has changed from logic low to logic high.
Mode Select Feature
The TCV7107F operation mode is switchable: synchronous (MODE=H) and non-synchronous (MODE=L).
While non-synchronous mode is applied, connect external SBD as a low side element.
The synchronous mode can achieve high efficiency at high load current. The non-synchronous mode can
achieve higher efficiency than synchronous mode when the load current is less than 100mA; however, take into
consideration the increase of the output ripple voltage. Switching function between synchronous and
non-synchronous is possible at anytime, but fluctuation in output voltage occurs at the time of switching and it
might be enlarged at low load current range where pulse-skip occurs. In that case a thorough evaluation is
desirable to ascertain that the fluctuation range is within requirements.
Over Current Protection
The TCV7107F has maximum current limiting. The TCV7107F limits the ON time of high side switching
transistor and decreases output voltage when the peak value of the Lx terminal current exceeds switching
terminal peak current limitation ILIM1 = 4.1A(typ.)@ VIN = 4.3V / ILIM2 = 3.7A(typ.)@ VIN = 3.3V. When VIN≧
4.3V, The TCV7107F can operate at IOUT = 3A(max). And when 4.3V＞VIN≧3.1V, it can operate at IOUT =
2.5A(max). Meanwhile, use it at IOUT = 2A(max) when VIN＜3.1V.
Feedback pin Voltage Detection
The TCV7107F has the Feedback pin voltage detection. When the feedback pin voltage decrease and reaches
VOLD = 0.36V (typ.), the TCV7107F shuts off the power supply after 65μs(typ.) and suppresses the rise of the
output voltage by ground fault of a feedback pin. When the decrease in the feedback pin voltage is detected when
the overcurrent protection operates, the output voltage is stopped.
The output voltage is not stopped by the feedback pin voltage detection while a soft start function is operating.
For this reason, the supply of the output voltage is begun by the soft start operation after an enable pin or the
input voltage is turned on.
Undervoltage Lockout (UVLO)
The TCV7107F has undervoltage lockout (UVLO) protection circuitry. The TCV7107F does not provide output
voltage (VOUT) until the input voltage has reached VUVR = 2.55V (typ.). UVLO has hysteresis of 0.1V (typ.).
After the switch turns on, if VIN2 drops below VUV = 2.45V (typ.), UVLO shuts off the switch at VOUT.
Undervoltage lockout
recovery voltage VUVR
VIN2
Undervoltage lockout
detection voltage VUV
Hysteresis: VUV
GND
Switching operation starts
VOUT
GND
Switching operation
stops
Soft start
Figure 4 Undervoltage Lockout Operation
7
2011-11-05
TCV7107F
Thermal Shutdown (TSD)
The TCV7107F provides thermal shutdown. When the junction temperature continues to rise and reaches TSD
= 150°C (typ.), the TCV7107F goes into thermal shutdown and shuts off the power supply. TSD has a hysteresis
of about 15°C (typ.). The device is enabled again when the junction temperature has dropped by approximately
15°C from the TSD trip point. The device resumes the power supply when the soft-start circuit is activated upon
recovery from TSD state.
Thermal shutdown is intended to protect the device against abnormal system conditions. It should be ensured
that the TSD circuit will not be activated during normal operation of the system.
TSD detection
temperature: TSD
Recovery from TSD
Hysteresis: TSD
Tj
0
Switching operation starts
VOUT
GND
Switching operation stops
Soft start
Figure 5 Thermal Shutdown Operation
Usage Precautions

The input voltage, output voltage, output current and temperature conditions should be considered when
selecting capacitors, inductors and resistors. These components should be evaluated on an actual system
prototype for best selection.

Parts of this product in the surrounding are examples of the representative, and the supply might become
impossible. Please confirm latest information when using it.

External components such as capacitors, inductors and resistors should be placed as close to the TCV7107F as
possible.

The TCV7107F has an ESD diode between the EN and VIN2 pins. The voltage between these pins should satisfy
VEN − VIN2  0.3V.

CIN should be connected as close to the PGND and VIN1 pins as possible. Operation might become unstable due
to board layout. In that case, add a decoupling capacitor (CC) of 0.1 μF to 1μF between the SGND and VIN2 pins.

The minimum programmable output voltage is 0.8V (typ.). If the difference between the input and output
voltages is small, the output voltage might not be regulated accurately and fluctuate significantly.

When TCV7107F is in operation, a negative voltage is generated since regeneration current flows through the
switch pin (LX). Even if the current flows through the low side parasitic diode during the dead time of switching
transistor, operation is undisturbed so an external flywheel diode is unnecessary. If there is the possibility of an
external negative voltage generation, add a diode for protection. While non-synchronous mode is applied, connect
external SBD as a low side element.

SGND pin is connected with the back of IC chip and serves as the heat radiation pin. Secure the area of a GND
pattern as large as possible for greater of heat radiation.

The overcurrent protection circuits in the Product are designed to temporarily protect Product from minor
overcurrent of brief duration. When the overcurrent protective function in the Product activates, immediately
cease application of overcurrent to Product. Improper usage of Product, such as application of current to Product
exceeding the absolute maximum ratings, could cause the overcurrent protection circuit not to operate properly
and/or damage Product permanently even before the protection circuit starts to operate.

The thermal shutdown circuits in the Product are designed to temporarily protect Product from minor
overheating of brief duration. When the overheating protective function in the Product activates, immediately
correct the overheating situation. Improper usage of Product, such as the application of heat to Product
exceeding the absolute maximum ratings, could cause the overheating protection circuit not to operate properly
and/or damage Product permanently even before the protection circuit starts to operate.
8
2011-11-05
TCV7107F
Typical Performance Characteristics
IIN – VIN
(μA)
500
400
IIN
400
Operating current
(μA)
500
Operating current
600
IIN
IIN – Tj
600
300
200
100
VEN = VFB = VIN
VMODE = VIN, Tj = 25°C
0
0
1
2
3
Input voltage
4
5
VIN
300
200
100
VEN = VIN = 5V
VFB = VMODE = VIN
0
6
-50
(V)
-25
0
25
50
Junction temperature
VIH(EN), VIL(EN) – Tj
Tj
EN threshold voltage
VIH(EN), VIL(EN) (V)
EN threshold voltage
VIH(EN), VIL(EN) (V)
1.5
VIH(EN)
VIL(EN)
0.5
(°C)
1.5
VIH(EN)
1
VIL(EN)
0.5
0
0
-50
-25
0
25
75
50
Junction temperature
Tj
100
-50
125
-25
0
25
50
Junction temperature
(°C)
IIH(EN) – VEN
75
Tj
100
125
(°C)
IIH(EN) – Tj
20
20
VIN = 5.6V
VIN = 5V
VEN = 5V
Tj = 25°C
16
EN input current
IIH(EN) (μA)
16
EN input current
IIH(EN) (μA)
125
VIN = 3.3V
VIN = 5V
1
100
VIH(EN), VIL(EN) – Tj
2
2
75
12
8
12
8
4
4
0
0
0
1
2
3
Junction temperature
4
VEN
5
6
-50
-25
0
25
50
Junction temperature
(V)
9
75
Tj
100
125
(°C)
2011-11-05
TCV7107F
VUV, VUVR – Tj
VOUT – VIN
2.6
VOUT (V)
Recovery voltage VUVR
2.5
Output voltage
Under voltage lockout VUV,VUVR
(V)
2
Detection voltage VUV
2.4
VEN = VIN
VOUT = 1.2 V
Tj = 25°C
1.5
1
0.5
VEN = VIN
2.3
0
-50
-25
0
25
50
Junction temperature
75
100
Tj
125
2.2
2.3
(°C)
2.4
Input voltage
VIN
0.82
2.7
(V)
VIN = 5V
VOUT = 1.2V
VEN = VIN
(V)
VEN = VIN
VOUT = 1.2V
Tj = 25°C
(V)
VFB
0.81
VFB input voltage
VFB
2.6
VFB – Tj
VFB – VIN
0.82
VFB input voltage
2.5
0.8
0.79
0.81
0.8
0.79
0.78
0.78
2
3
4
Input voltage
5
VIN
-50
6
(V)
-25
0
25
50
Junction temperature
75
Tj
100
125
(°C)
VOUT – VIN
VOUT
(mV)
30
VOUT = 1.2V , IOUT = 0mA
L = 4.7μH , COUT = 10μF ×3
Ta = 25°C
20
10
Output voltage
0
-10
-20
-30
2
3
4
Input voltage
5
VIN
6
(V)
10
2011-11-05
TCV7107F
fOSC - VIN
fOSC - Tj
650
(kHz)
Tj = 25°C
fOSC
600
Oscillation frequency
Oscillation frequency
fOSC
(kHz)
650
550
500
450
2.
3
4
Input voltage
5
VIN
600
550
500
450
-50
6
-25
0
25
50
Junction temperature
(V)
Startup Characteristics
(synchronous mode Soft-Start Time)
VIN = 5V
VOUT = 1.8V
Ta = 25°C
L = 4.7μH
COUT = 10 μF×3
VMODE = 5V
VIN = 5V
75
Tj
100
125
(°C)
Startup Characteristics
(non-synchronous mode Soft-Start Time)
VIN = 5V
VOUT = 1.8V
Ta = 25°C
L = 4.7μH
COUT = 10 μF×3
VMODE = 0V
Output voltage VOUT (1V/div)
Output voltage VOUT (1V/div)
EN voltage VEN:L→H ( 5V/div )
EN voltage VEN:L→H ( 5V/div )
2ms/div
2ms/div
11
2011-11-05
TCV7107F
VOUT – IOUT
( non-synchronous mode)
VOUT – IOUT
( non-synchronous mode)
-10
-20
-30
20
10
Output voltage
0
(mV)
30
VIN = 5V , VOUT = 3.3V
L = 4.7 μH , COUT = 10 μF×2
VMODE = 0V , Ta = 25°C
CRS30I30A
VOUT
(mV)
10
Output voltage
20
VOUT
30
0
0.5
1
1.5
Output current
2
2.5
IOUT
(mV)
10
Output voltage
20
VOUT
(mV)
VOUT
Output voltage
-20
1.5
Output current
2
IOUT
1.5
-20
0
0.5
1
1.5
2
Output current
IOUT
2.5
3.0
(A)
VOUT – IOUT
(synchronous mode)
30
VIN = 3.3V , VOUT = 1.2V
VMODE = 5V , Ta = 25°C
20
10
Output voltage
0
(mV)
L = 4,7μH , COUT = 10μF×3
VOUT
(mV)
VOUT
Output voltage
(A)
-10
VIN = 5V , VOUT = 1.2V
-10
-20
-30
IOUT
3.0
L = 4.7μH , COUT = 10μF×2
(A)
30
10
2.5
0
2.5
VOUT – IOUT
(synchronous mode)
20
2
VMODE = 5V , Ta = 25°C
-30
1
1
VIN = 5V , VOUT = 3.3V
-10
0.5
0.5
30
VIN = 3.3V , VOUT = 1.2V
L = 4.7μH , COUT = 10μF×3
VMODE = 0V , Ta = 25°C
CRS30I30A
0
0
VOUT – IOUT
(synchronous mode)
0
-30
-20
Output current
30
10
-10
(A)
VOUT – IOUT
( non-synchronous mode)
20
0
-30
3.0
VIN = 5V , VOUT = 1.2V
L = 4.7μH , COUT = 10 μF×3
VMODE = 0V , Ta = 25°C
CRS30I30A
L = 4,7μH , COUT = 10μF×3
VMODE = 3.3V , Ta = 25°C
0
-10
-20
-30
0
0.5
1
1.5
Output current
2
IOUT
2.5
3.0
0
0.5
1
1.5
Output current
(A)
12
2
IOUT
2.5
(A)
2011-11-05
TCV7107F
Overcurrent Protection
(synchronous mode)
Overcurrent Protection
(synchronous mode)
2
2
1
0.5
0
1
VIN = 5V , VOUT = 1.2V
L = 4.7μH , COUT = 10μF ×3
Ta = 25°C
(V)
VOUT
1.5
Output voltage
Output voltage
VOUT
(V)
VIN = 3.3V , VOUT = 1.2V
L = 4.7μH , COUT = 10μF ×3
Ta = 25°C
1.5
1
0.5
0
2
3
Output current
4
IOUT
5
1
2
(A)
IOUT
5
(A)
Overcurrent Protection
(synchronous mode)
4
VOUT
(V)
(V)
4
3
Output voltage
VOUT
4
Output current
Overcurrent Protection
(synchronous mode)
Output voltage
3
2
1
3
2
1
VIN = 5V , VOUT = 3.3V
L = 4.7μH , COUT = 10μF ×2F
Ta = 25°C
VIN = 4.3V , VOUT = 3.3V
L = 4.7μH , COUT = 10μF ×2
Ta = 25°C
0
0
1
2
3
Output current
4
IOUT
1
5
2
3
Output current
(A)
13
4
IOUT
5
(A)
2011-11-05
TCV7107F
 – IOUT
( non-synchronous mode)
 – IOUT
( non-synchronous mode)
100
80
80
VIN = 5V , VMODE = 0V
VOUT = 3.3V
L = 4.7μH,
COUT = 10μF ×2
Ta = 25°C
CRS30I30A
20
0
0.001
0.01
0.1
Output current
1
IOUT

40
60
Efficiency

60
Efficiency
(%)
(%)
100
40
VIN = 5V , VMODE = 0V
VOUT = 1.2V
L = 4.7μH,
COUT = 10μF ×3
Ta = 25°C
CRS30I30A
20
0
0.001
10
(A)
0.01
0.1
Output current
10
1
IOUT
(A)
 – IOUT
(synchronous mode)
 – IOUT
( non-synchronous mode)
100
80
80
VIN = 3.3V , VMODE = 0V
VOUT = 1.2V
L = 4.7μH,
COUT = 10μF ×3
Ta = 25°C
CRS30I30A
20
0
0.001
0.01
0.1
Output current
1
IOUT

40
60
Efficiency

60
Efficiency
(%)
(%)
100
40
VIN = 5V, VMODE = 5V
VOUT = 3.3V
L = 4.7μH,
COUT = 10μF ×2
Ta = 25°C
20
0
0.001
10
(A)
0.01
0.1
Output current
 – IOUT
(synchronous mode)
100
80
80
IOUT
10
(A)
 – IOUT
(synchronous mode)

60

60
Efficiency
40
Efficiency
(%)
(%)
100
1
40
VIN = 5V , VMODE = 5V
VOUT = 1.2V
L = 4.7μH,
COUT = 10μF ×3
Ta = 25°C
20
0
0.001
0.01
0.1
Output current
1
IOUT
VIN = 3.3V, VMODE = 3.3V
VOUT = 1.2V
L = 4.7μH,
COUT = 10μF ×3
Ta = 25°C
20
0
0.001
10
(A)
0.01
0.1
Output current
14
1
IOUT
10
(A)
2011-11-05
TCV7107F
Load Response Characteristics
(synchronous mode)
Load Response Characteristics
( non-synchronous mode)
VIN = 5V , VOUT = 1.8V , Ta = 25°C
L = 4.7μH , COUT = 10μF ×3
VIN = 5V , VOUT = 1.8V , Ta = 25°C
L = 4.7μH , COUT = 10μF ×3
Output voltage VOUT (100 mV/div)
Output voltage VOUT (100 mV/div)
Output current IOUT :
(10mA→2A→10mA)
Output current IOUT :
(10mA→2A→10mA)
200 μs/div
200 μs/div
Mode Switching IOUT=2A
（non-synchronous→synchronous→non-synchronous）
Mode Switching IOUT =100mA
（non-synchronous→synchronous→non-synchronous）
VIN = 5V , VOUT = 1.8V , IOUT = 2A
Ta = 25°C , L = 4.7μH , COUT = 10μF ×3
VIN = 5V , VOUT = 1.8V , IOUT = 100mA
Ta = 25°C , L = 4.7μH , COUT = 10μF ×3
Output voltage VOUT (50 mV/div)
Output voltage VOUT (50 mV/div)
MODE:
L → H→ L
( 5V/div )
MODE:
L → H→ L
40 μs/div
40 μs/div
Mode Switching IOUT =1.5mA
（non-synchronous→synchronous）
Mode Switching IOUT =1.5mA
（synchronous→non-synchronous）
VIN = 5V , VOUT = 1.8V , IOUT = 1.5mA
Ta = 25°C , L = 4.7μH , COUT = 10μF ×3
VIN = 5V , VOUT = 1.8V , IOUT = 1.5mA
Ta = 25°C , L = 4.7μH , COUT = 10μF ×3
Output voltage VOUT (50 mV/div)
Output voltage VOUT (50 mV/div)
MODE:
L
( 5V/div )
→
H
MODE:
40 μs/div
H
→
L
200 μs /div
15
2011-11-05
TCV7107F
Package Dimensions
HSON8-P-0505-1.27
Unit: mm
Weight: 0.068 g (typ.)
16
2011-11-05
TCV7107F
RESTRICTIONS ON PRODUCT USE
 Toshiba Corporation, and its subsidiaries and affiliates (collectively “TOSHIBA”), reserve the right to make changes to the information
in this document, and related hardware, software and systems (collectively “Product”) without notice.
 This document and any information herein may not be reproduced without prior written permission from TOSHIBA. Even with
TOSHIBA’s written permission, reproduction is permissible only if reproduction is without alteration/omission.
 Though TOSHIBA works continually to improve Product’s quality and reliability, Product can malfunction or fail. Customers are
responsible for complying with safety standards and for providing adequate designs and safeguards for their hardware, software and
systems which minimize risk and avoid situations in which a malfunction or failure of Product could cause loss of human life, bodily
injury or damage to property, including data loss or corruption. Before customers use the Product, create designs including the Product,
or incorporate the Product into their own applications, customers must also refer to and comply with (a) the latest versions of all
relevant TOSHIBA information, including without limitation, this document, the specifications, the data sheets and application notes for
Product and the precautions and conditions set forth in the “TOSHIBA Semiconductor Reliability Handbook” and (b) the instructions for
the application with which the Product will be used with or for. Customers are solely responsible for all aspects of their own product
design or applications, including but not limited to (a) determining the appropriateness of the use of this Product in such design or
applications; (b) evaluating and determining the applicability of any information contained in this document, or in charts, diagrams,
programs, algorithms, sample application circuits, or any other referenced documents; and (c) validating all operating parameters for
such designs and applications. TOSHIBA ASSUMES NO LIABILITY FOR CUSTOMERS’ PRODUCT DESIGN OR APPLICATIONS.
 Product is intended for use in general electronics applications (e.g., computers, personal equipment, office equipment, measuring
equipment, industrial robots and home electronics appliances) or for specific applications as expressly stated in this document.
Product is neither intended nor warranted for use in equipment or systems that require extraordinarily high levels of quality and/or
reliability and/or a malfunction or failure of which may cause loss of human life, bodily injury, serious property damage or serious public
impact (“Unintended Use”). Unintended Use includes, without limitation, equipment used in nuclear facilities, equipment used in the
aerospace industry, medical equipment, equipment used for automobiles, trains, ships and other transportation, traffic signaling
equipment, equipment used to control combustions or explosions, safety devices, elevators and escalators, devices related to electric
power, and equipment used in finance-related fields. Do not use Product for Unintended Use unless specifically permitted in this
document.
 Do not disassemble, analyze, reverse-engineer, alter, modify, translate or copy Product, whether in whole or in part.
 Product shall not be used for or incorporated into any products or systems whose manufacture, use, or sale is prohibited under any
applicable laws or regulations.
 The information contained herein is presented only as guidance for Product use. No responsibility is assumed by TOSHIBA for any
infringement of patents or any other intellectual property rights of third parties that may result from the use of Product. No license to
any intellectual property right is granted by this document, whether express or implied, by estoppel or otherwise.
 ABSENT A WRITTEN SIGNED AGREEMENT, EXCEPT AS PROVIDED IN THE RELEVANT TERMS AND CONDITIONS OF SALE
FOR PRODUCT, AND TO THE MAXIMUM EXTENT ALLOWABLE BY LAW, TOSHIBA (1) ASSUMES NO LIABILITY
WHATSOEVER, INCLUDING WITHOUT LIMITATION, INDIRECT, CONSEQUENTIAL, SPECIAL, OR INCIDENTAL DAMAGES OR
LOSS, INCLUDING WITHOUT LIMITATION, LOSS OF PROFITS, LOSS OF OPPORTUNITIES, BUSINESS INTERRUPTION AND
LOSS OF DATA, AND (2) DISCLAIMS ANY AND ALL EXPRESS OR IMPLIED WARRANTIES AND CONDITIONS RELATED TO
SALE, USE OF PRODUCT, OR INFORMATION, INCLUDING WARRANTIES OR CONDITIONS OF MERCHANTABILITY, FITNESS
FOR A PARTICULAR PURPOSE, ACCURACY OF INFORMATION, OR NONINFRINGEMENT.
 Do not use or otherwise make available Product or related software or technology for any military purposes, including without limitation,
for the design, development, use, stockpiling or manufacturing of nuclear, chemical, or biological weapons or missile technology
products (mass destruction weapons). Product and related software and technology may be controlled under the Japanese Foreign
Exchange and Foreign Trade Law and the U.S. Export Administration Regulations. Export and re-export of Product or related software
or technology are strictly prohibited except in compliance with all applicable export laws and regulations.
 Please contact your TOSHIBA sales representative for details as to environmental matters such as the RoHS compatibility of Product.
Please use Product in compliance with all applicable laws and regulations that regulate the inclusion or use of controlled substances,
including without limitation, the EU RoHS Directive. TOSHIBA assumes no liability for damages or losses occurring as a result of
noncompliance with applicable laws and regulations.
17
2011-11-05