TB7110F
TOSHIBA BiCD Integrated Circuit
Silicon Monolithic
TB7110F
Buck DC-DC Converter IC・Series Regulator IC
The TB7110F is single chip power supply ICs that integrated buck
DC-DC converter section utilizing a chopper circuit and series regulator
section. The TB7110F contains high-speed P-channel MOSFETs for the
high side main switch to achieve high efficiency. And series regulator
section is fed into a overcurrent circuit of fold buck type, and it protects
this product from the short circuit state of the load.
Features
•
•
•
•
•
•
•
•
•
HSON8-P-0505-1.27
Output current: DC-DC Converter section IOUT1 = 1.5A(max.)
Weight: 0.068 g (typ.)
Series Regulator section IOUT2 = 800mA(max.)
High efficiency: DC-DC Converter section η = 86% (typ.) (@VIN1 =
24V, VOUT1 = 5V, IOUT1 = 500mA)
Operating input voltage range: VIN1 = 4.5V to 27V
On-state resistance: RDS(ON) = 0.7Ω (high-side) typical (@VIN1 = 24V, Tj = 25℃)
Oscillation frequency: fOSC = 500kHz (typ.)
Reference voltage: VREF = 1.215V ± 2.9% (@Tj = 25°C)
Housed in a small surface-mount package (SOP Advance) with a low thermal resistance
Soft-start feature
Overcurrent protection: fold buck type for the Series Regulator section
ILMIT2(1) = 1.2A(typ.)(@ VIN2 = 6V, VOUT2 = 4.5V), ILMIT2(2) = 200mA(typ.)(@ VIN2 = 6V, VOUT2 = 0V)
Part Marking
Pin Assignment
Part Number (or abbreviation code)
TB
7110F
VFB1
EN
8
7
VFB2
6
VOUT2
5
Lot No.
The dot (•) on the top surface indicates pin 1.
1
2
3
4
Lx
VIN1
VIN2
GND
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
(1) to avoid such overloads upon the Product, and (2) 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.
Start of commercial production
2010-09
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TB7110F
Ordering Information
Part Number
Shipping
TB7110F (TE12L, Q)
Embossed tape (3000 units per reel)
Block Diagram
VIN1
Current Detection
Slope
Oscillator
Compensation
Under
Voltage
Lockout
Control
Logic
+
-
Driver
LX
Short-Circuit
Error Amplifier
-
VFB1
+
Protection
Phase
Compensation
Current Detection
+
-
Soft
Start
EN
Ref.Voltage
(1.215V)
VIN2
+
Error Amplifier
VOUT2
VFB2
GND
Pin Description
Pin No.
Symbol
Description
1
LX
2
VIN1
This pin is placed in the standby state if VEN=”L”.
Standby current is 70 μA(@VIN = 24V) or less.
3
VIN2
Input pin for the Series Regulator section. It uses on the condition of VIN1≧VIN2.
4
GND
Ground pin
5
VOUT2
6
VFB2
Switch pin
This pin is connected to high-side P-channel MOSFET.
Input pin
Output pin for the Series Regulator section
Feedback pin for the Series Regulator section
This input is fed into an internal error amplifier with a reference voltage of 1.215 V (typ.).
Enable pin
7
EN
When VEN ≥ 1.8V (@ VIN1 = 24V), the internal circuitry is allowed to operate and thus enable
the switching operation of the output section. When VEN ≤ 0.5V (@ VIN1 = 24V), the internal
circuitry is disabled, putting the TB7110F in Standby mode.
This pin has an internal pull-up current of 3.5µA(typ.).
8
VFB1
Feedback pin for the DC-DC Converter section
This input is fed into an internal error amplifier with a reference voltage of 1.215 V (typ.).
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TB7110F
Absolute Maximum Ratings (Ta = 25°C) (Note)
Characteristics
Symbol
Rating
Unit
Input pin voltage
VIN1
-0.3 to 30
V
Input pin voltage
VIN2
-0.3 to 30
V
VLX
-0.3 to 30
V
Feedback1 pin voltage
VFB1
-0.3 to 30
V
Feedback2 pin voltage
VFB2
-0.3 to 30
V
Enable pin voltage
VEN
-0.3 to 30
V
Switch pin current
ILX
-1.8
A
Output pin current
IOUT2
-0.8
A
PD
2.2
W
Tjopr
-40 to 125
℃
Tj
150
°C
Tstg
-55 to 150
°C
Switch pin voltage
Power dissipation
(Note 1)
(Note 2)
Operating junction temperature
Junction temperature
(Note 3)
Storage temperature
Thermal Resistance Characteristics
Characteristics
Symbol
Max
Unit
Thermal resistance, junction to ambient
Rth (j-a)
44.6
(Note 2)
°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: The switch pin voltage (VLX) doesn’t include the peak voltage generated by TB7110F’s switching.
A negative voltage generated in dead time is permitted among the switch pin current (ILX).
Note 2:
Glass epoxy board
FR-4
25.4 × 25.4 × 0.8
(Unit: mm)
Single-pulse measurement: pulse width t=10(s)
Note 3: The TB7110F may go 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.
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TB7110F
Electrical Characteristics (Tj = 25°C, VIN1 = VIN2 = 4.5V to 27V, unless otherwise specified)
Characteristics
Symbol
Test Condition
Min
Typ.
Max
Unit
VIN1(OPR)
⎯
4.5
⎯
27
V
⎯
⎯
5
mA
⎯
⎯
70
μA
VIN1 = 24V
1.8
⎯
⎯
VIL(EN)
VIN1 = 24V
⎯
⎯
0.5
IIH(EN)
VIN1 = 24V, VEN = 5V
−5
⎯
5
IIL(EN)
VIN1 = 24V, VEN = 0V
⎯
−3.5
⎯
TSD
VIN1 = 24V , VEN = 5V
⎯
155
⎯
°C
Hysteresis
ΔTSD
VIN1 = 24V , VEN = 5V
⎯
10
⎯
°C
Detection
voltage
VUV
VEN = 5V
3.2
3.7
4.2
V
Recovery
voltage
VUVR
VEN = 5V
3.5
4.0
4.5
V
Hysteresis
ΔVUV
VEN = 5V
⎯
0.3
⎯
V
VIN1 = 24V , VEN = 5V, IOUT1 = 0A
Measured between 0% and 90%
1.2
2.5
4
ms
Operating input voltage
Operating current
IIN1
Standby current
IIN1(STBY)
VIH(EN)
EN threshold voltage
EN input current
Thermal
shutdown (TSD)
Undervoltage
lockout (UVLO)
Detection
temperature
Internal soft-start time
tSS
VIN1 = 24V , VEN = 5V
VFB1 = 2V
VIN1 = 24V , VEN = 0V
VFB1 = 0.8V
V
μA
points at VOUT1
Reference voltage
VREF
VIN1 = 24V , VEN = 5V
1.18
1.215
1.25
V
VFB input voltage
VFB1
VIN1 = 24V , VEN = 5V
⎯
1.215
⎯
V
VFB input current
IFB1
-1
⎯
1
μA
1.215
⎯
VIN1-3
V
⎯
⎯
10
μA
⎯
0.7
⎯
Ω
DC-DC Converter section
Output voltage range
High-side switch leakage current
High-side switch on-state resistance
VIN1 = 24V , VEN = 5V
VFB1 = 2V
VOUT1(OPR) VEN = VIN1
ILEAK (H)
RDS(ON)(H)
VIN1 = 24V, VEN = 0V
VFB1 = 0.8V, VLX = 0V
VIN1 = 24V , VEN = 5V
ILX = - 0.1A
Oscillation frequency
fOSC
VIN1 = 24V , VEN = 5V
400
500
600
kHz
High-side switch duty cycle
Dmax
VIN1 = 24V , VEN = 5V
⎯
⎯
100
%
LX current limit
ILIM1
1.8
3
⎯
A
⎯
1.215
⎯
V
-5
⎯
-5
μA
⎯
⎯
50
mV
0.8
1.2
⎯
A
⎯
200
⎯
mA
VIN1 = 24V , VEN = 5V
VOUT1 = 5V
Series Regulator section
VFB input voltage
VFB2
VFB input current
IFB2
Load regulation
Reg・Load
ILIM2(1)
VOUT2 current limit
ILIM2(2)
VIN1 = 24V , VEN = 5V
VIN1 = 24V , VIN2 = 6V
VFB2 = 2V, VEN = 5V
VIN1 = 24V, VIN2 = 6V, VOUT2 = 5V
IOUT2 = 5mA to 800mA
VIN1 = 24V , VIN2 = 6V
VFB2 = 1V , VOUT2 = 4.5V
VIN1 = 24V , VIN2 = 6V
VFB2 = 0V , VOUT2 = 0V
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TB7110F
Application Circuit Example 1
・DC-DC Converter＋Series Regulator
VIN
L
VOUT1
VIN2
Lx
VOUT2
VIN1
VFB1
TB7110F
EN
EN
VOUT2
RFB1
RFB3
VFB2
CIN
GND
SBD
COUT1
COUT2
RFB2
RFB4
GND
GND
Component values (reference value@ VIN1 = 24V, VOUT1 = 5V, VOUT2 = 3.3V, Ta = 25°C)
CIN : VIN1 Input filter capacitor = 4.7μF
(ceramic capacitor: GRM31CR71H475KA12L manufactured by Murata Manufacturing Co., Ltd.)
COUT1 : VOUT1 Output filter capacitor = 22μF
(ceramic capacitor: GRM31CB31C226ME15L manufactured by Murata Manufacturing Co., Ltd.)
C OUT2 : VOUT2 Output capacitor = 4.7μF
(ceramic capacitor: GRM31CR71H475KA12L manufactured by Murata Manufacturing Co., Ltd.)
RFB1 : Output voltage setting resistor for the DC-DC converter section = 4.7kΩ
RFB2 : Output voltage setting resistor for the DC-DC converter section = 1.5kΩ
RFB3 : Output voltage setting resistor for the Series regulator section = 4.7kΩ
RFB4 : Output voltage setting resistor for the Series regulator section = 2.7kΩ
L
: Inductor = 15μH(CLF7045T-150M manufactured by TDK-EPC Corporation)
SBD : Schottky barrier diode(CRS20I40B manufactured by Toshiba Corporation)
Application Circuit Example 2
・DC-DC Converter
VIN
VOUT1
L
Lx
VIN2
VOUT2
VIN1
VFB1
TB7110F
EN
RFB1
EN
VFB2
CIN
SBD
GND
COUT1
RFB2
GND
GND
Component values (reference value@ VIN1 = 24V, VOUT1 = 5V, Ta = 25°C)
CIN : VIN1 Input filter capacitor = 4.7μF
(ceramic capacitor: GRM31CR71H475KA12L manufactured by Murata Manufacturing Co., Ltd.)
COUT1 : VOUT1 Output filter capacitor = 22μF
(ceramic capacitor: GRM31CB31C226ME15L manufactured by Murata Manufacturing Co., Ltd.)
RFB1 : Output voltage setting resistor for the DC-DC converter section = 4.7kΩ
RFB2 : Output voltage setting resistor for the DC-DC converter section = 1.5kΩ
L
: Inductor = 15μH(CLF7045T-150M manufactured by TDK-EPC Corporation)
SBD : Schottky barrier diode(CRS20I40B manufactured by Toshiba Corporation)
Figure 1 TB7110F Application Circuit Examples
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TB7110F
Application Notes
DC-DC Converter section
Inductor Selection
The inductance required for inductor L can be calculated as follows:
VIN1: Input voltage (V)
VIN1 − VOUT1 VOUT1
VOUT1: Output voltage (V)
L=
⋅
·············· (1)
fOSC ⋅ΔIL
VIN1
fOSC: Oscillation frequency = 500kHz (typ.)
ΔIL: Inductor ripple current (A)
*: Generally, ΔIL should be set to approximately 30% of the maximum output current. Since the maximum
output current of the TB7110F is 1.5A, ΔIL should be 0.5A or so. The inductor should have a current rating
greater than the peak output current of 1.75A. If the inductor current rating is exceeded, the inductor
becomes saturated, leading to an unstable DC-DC converter operation.
L=
=
VIN1 − VOUT1 VOUT1
⋅
fOSC ⋅ΔIL
VIN1
24V − 5 V
5V
⋅
500kHz ⋅ 0.5A 24 V
ΔIL
When VIN1 = 24V and VOUT1 = 5V, 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=
= 15.8 μH
1
TON = T ⋅
fosc
VOUT1
VIN1
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 (1.215V typ.), which is connected to the Feedback pin,
VFB. RFB2 should be up to 10kΩ or so, because an extremely large-value RFB2 incurs a delay due to parasitic
capacitance at the VFB1 pin. It is recommended that resistors with a precision of ±1% or higher be used for
RFB1 and RFB2.
VFB1
⎛ R ⎞
= 1.215 V × ⎜⎜1 + FB1 ⎟⎟ ···· (2)
⎝ R FB2 ⎠
VOUT1
RFB2 RFB1
LX
⎞
⎛ R
VOUT1 = VFB1 × ⎜⎜1 + FB1 ⎟⎟
R
FB2 ⎠
⎝
Figure 3 Output Voltage Setting Resistors
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. The capacitance should be set
to an optimal value that meets the system’s ripple voltage requirement and transient load response
characteristics.
Rectifier Selection
A Schottky barrier diode should be externally connected to the TB7110F as a rectifier between the LX and
GND pins. It is recommended CRS20I40B or equivalent be used as the Schottky barrier diode. If a large voltage
overshoot is on the LX pin, it reduces the voltage to connect a series CR network consisting of a resistor of RS =
47Ω and a capacitor of CS = 330pF with the Schottky barrier diode in parallel. Power loss of the 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.
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TB7110F
Overcurrent Protection（OCP）
The TB7110F has built-in overcurrent protection with pulse skip. When the peak current of LX pin exceeds
ILIM1=3.0A(typ.)(@VIN1=24V), the ON time of the high-side switch (internal) will be limited. Switching frequency
will be reduced and output current will be restricted further if output voltage falls and the voltage of VFB1 pin
drops below the overcurrent pulse skip detection voltage VLOC (0.5V typ.) during overcurrent protection .
Series Regulator section
Overcurrent Protection（OCP）
TB7110F is fed into a overcurrent circuit of fold buck type, and it protects this product from the overcurrent
state of the load.
VOUT2
5V
4.5V
0
ILIM2(2)
ILIM2(1)
200mA(typ)
1.2A(typ)
IOUT2
Figure 4 Overcurrent Protection Operation
Setting the Output Voltage
⎛
R
VOUT2 = VFB2 × ⎜⎜ 1 + FB3
R FB4
⎝
⎞
⎟⎟
⎠
VOUT2
⎛
⎞
⎜ R ⎟
= 1.215 V × ⎜1 + FB3 ⎟ ······ (3)
⎜ R FB4 ⎟
⎝
⎠
VFB2
RFB4 RFB3
A resistive voltage divider is connected as shown in Figure 5 to set the output voltage; it is given by Equation
3 based on the reference voltage of the error amplifier (1.215V typ.), which is connected to the Feedback pin,
VFB2. RFB4 should be up to 10kΩ or so, because an extremely large-value RFB4 incurs a delay due to parasitic
capacitance at the VFB2 pin. It is recommended that resistors with a precision of ±1% or higher be used for
RFB3 and RFB4. Please make a set voltage of VOUT2 VIN1- 3V or less.
Figure 5 Output Voltage Setting Resistors
Output Filter Capacitor Selection
Use a ceramic capacitor as the output filter capacitor. As a rule of thumb, its capacitance should be 4.7μF or
greater. Since a capacitor is generally sensitive to temperature, choose one with excellent temperature
characteristics. The IC may oscillate due to external conditions (output current, or temperature etc.). The type
of capacitor required must be determined by the actual application circuit in which the IC is used.
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TB7110F
Dropout Voltage
If the voltage difference becomes small between input pin (VIN2) and output pin (VOUT2) of the series
regulator section, the output voltage might decrease and the load regulation characteristics deteriorate. If you
obtain an excellent load regulation characteristic, please you use the condition of becoming a potential difference
that is bigger than the dropout voltage shown in Figure 6.
IOUT2 – (VIN2 - VOUT2)
Output current
IOUT2
(A)
1.0
0.8
Tj=25°C
Tj=125°C
0.6
0.4
0.2
0
0
0.5
1.0
Dropout voltage
1.5
2.0
2.5
VIN2 - VOUT2 (V)
Figure 6 Dropout voltage
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TB7110F
Note on Electrical Characteristics
Soft-Start Feature
The TB7110F has a soft-start feature. The soft-start time, tSS for VOUT1 and VOUT2 defaults to 2.5ms (typ.)
internally.
The soft-start feature is activated when the TB7110F 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.
Thermal Shutdown (TSD)
The TB7110F provides thermal shutdown. When the junction temperature continues to rise and reaches TSD
(155°C typ.), the TB7110F goes into thermal shutdown and shuts off the power supply. TSD has a hysteresis of
about 10°C (typ.). The device is enabled again when the junction temperature has dropped by approximately
10°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: ΔTSD
Tj
0
Switching operation starts
VOUT1
VOUT2
GND
Switching operation stops
Soft start
Figure 7 Thermal Shutdown Operation
Undervoltage Lockout (UVLO)
The TB7110F has undervoltage lockout (UVLO) protection circuitry. The TB7110F does not provide output
voltage (VOUT1 and VOUT2) until the input voltage (VIN1) has reached VUVR (4.0V typ.). UVLO has hysteresis
of 0.3V (typ.). After the switch turns on, if VIN1 drops below VUV (3.7V typ.), UVLO shuts off the switch at
VOUT1 and VOUT2.
Undervoltage lockout
recovery voltage VUVR
VIN1
Undervoltage lockout
detection voltage VUV
Hysteresis: ΔVUV
GND
Switching operation starts
VOUT1
VOUT2
GND
Switching operation
stops
Soft start
Figure 8 Undervoltage Lockout Operation
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TB7110F
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 TB7110F as
possible.
•
CIN should be connected as close to the GND and VIN1 pins as possible. Operation might become unstable due
to a board layout and a characteristics of capacitance.
•
The minimum programmable output voltage is 1.215V (typ.). If the difference between the input and output
voltages is small, the output voltage might not be regulated accurately and fluctuate significantly.
•
GND(4) 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.
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TB7110F
Typical Performance Characteristics
IIN1 – VIN1
IIN1 – Tj
IIN1 (mA)
2.0
1.5
Operating current
Operating current
IIN1 (mA)
2.0
1
0.5
VEN = VIN1
VFB1 = 2V, VFB2 = 0V
Tj = 25°C
0
0
5
15
20
Input voltage
VIN1
10
25
1.5
1
0.5
VEN = VIN1 = 24V
VFB1 = VFB2 = 0V
0
30
-50
(V)
-25
0
25
50
75
Junction temperature
Tj
100
125
(°C)
IIH(EN) – VEN
VIH(EN), VIL(EN) – Tj
2
2.0
0
1.5
VIH(EN)
EN input current
IIH(EN) (μA)
EN threshold voltage
VIH(EN), VIL(EN) (V)
VIN1 = 24V
VFB1 = 0V
1
VIL(EN)
-2
-4
0.5
VIN1 = VIN2 = 24V
VFB1 = VFB2 = 0V
Tj = 25°C
-6
0
-50
0
-25
25
50
75
Junction temperature
Tj
100
0
125
5
10
15
EN input voltage
(°C)
25
20
VEN
30
(V)
VUV, VUVR – Tj
VOUT2 – VIN1
5.0
1.5
Undervoltage lockout voltage
VUV,VUVR (V)
Output voltage
VOUT2
(V)
VEN = VIN1 = 24V
1.2
0.9
0.6
VIN1 = VIN2
VEN = VIN1
VFB1 = 0V
VFB2 = VOUT2
Tj = 25°C
0.3
0
VFB1 = 0V
4.5
Recovery voltage VUVR
4.0
Detection voltage VUV
3.5
3.0
3
3.4
3.8
Input voltage
4.2
VIN1
4.6
-50
5
-25
0
25
50
Junction temperature
(V)
11
75
Tj
100
125
(°C)
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TB7110F
VFB2 – VIN1
VFB2 – Tj
1.22
1.20
1.18
1.16
(V)
VIN1 = VIN2
VEN = VIN1
Tj = 25°C
1.26
VFB2
1.28
1.24
Feedback pin voltage
(V)
1.24
Feedback pin voltage
1.26
VFB2
1.28
VIN1 = VIN2 = 24V
VEN = VIN1
1.22
1.20
1.18
1.16
0
5
10
20
15
Input voltage
VIN1
25
-50
30
-25
(V)
0
fOSC – VIN1
75
Tj
100
125
(°C)
fOSC – Tj
560
VIN1 = 24V
(kHz)
(kHz)
fOSC
520
Oscillation frequency
fOSC
50
Junction temperature
560
Oscillation frequency
25
480
440
Tj = 25°C
400
520
480
440
400
0
5
10
15
Input voltage
20
VIN1
25
30
-50
(V)
-25
0
25
50
Junction temperature
12
75
Tj
100
125
(°C)
2013-11-01
TB7110F
Overcurrent Protection
(DC-DC Converter section)
6
5
5
VOUT1
(V)
6
4
3
2
VIN1 = 8V
VOUT1 = 5V
L = 15μH
Ta = 25°C
1
4
3
Output voltage
Output voltage
VOUT1
(V)
Overcurrent Protection
(DC-DC Converter section)
2
VIN1 = 12V
VOUT1 = 5V
L = 15μH
Ta = 25°C
1
0
0
0
1
2
Output current
3
IOUT1
4
0
1
(A)
6
5
5
VOUT1
(V)
6
4
3
4
(A)
2
VIN1 = 24V
VOUT1 = 5V
L = 15μH
Ta = 25°C
4
3
2
VIN1 = 8V
VOUT1 = 3.3V
L = 15μH
Ta = 25°C
1
0
0
0
1
2
Output current
3
IOUT1
4
0
(A)
3
Output current
IOUT1
4
(A)
6
(V)
5
(V)
5
VOUT1
4
VOUT1
Overcurrent Protection
(DC-DC Converter section)
6
Output voltage
3
2
VIN1 = 12V
VOUT1 = 3.3V
L = 15μH
Ta = 25°C
1
2
1
Overcurrent Protection
(DC-DC Converter section)
Output voltage
3
IOUT1
Overcurrent Protection
(DC-DC Converter section)
Output voltage
Output voltage
VOUT1
(V)
Overcurrent Protection
(DC-DC Converter section)
1
2
Output current
0
4
3
2
VIN1 = 24V
VOUT1 = 3.3V
L = 15μH
Ta = 25°C
1
0
0
1
2
Output current
3
IOUT1
4
0
(A)
1
2
Output current
13
3
IOUT1
4
(A)
2013-11-01
TB7110F
ΔVOUT1 – IOUT1
(DC-DC Converter section)
ΔVOUT1 – IOUT1
(DC-DC Converter section)
100
100
50
ΔVOUT1
0
Output voltage
ΔVOUT1
50
Output voltage
VIN1 = 12V , VOUT1= 5V
L = 15μH , COUT1 = 22μF
Ta = 25°C , LS : CRS20I40B
(mV)
(mV)
VIN1 = 8V , VOUT1= 5V
L = 15μH , COUT1 = 22μF
Ta = 25°C , LS : CRS20I40B
-50
-100
0
-50
-100
0
0.3
0.6
Output current
0.9
1.2
IOUT1
(A)
0
1.5
(mV)
ΔVOUT1
0
-50
0.9
1.2
0
IOUT1
-100
1.5
(A)
0.9
IOUT1
1.2
1.5
(A)
100
0
(mV)
50
-50
0
0.3
0.6
Output current
0.9
IOUT1
1.2
VIN1 =24V , VOUT1 = 3.3V
L = 15μH , COUT1 = 22μF
Ta = 25°C , LS : CRS20I40B
50
ΔVOUT1
VIN1 =12V , VOUT1 = 3.3V
L = 15μH , COUT1 = 22μF
Ta = 25°C , LS : CRS20I40B
0
Output voltage
(mV)
ΔVOUT1
0.6
ΔVOUT1 – IOUT1
(DC-DC Converter section)
100
Output voltage
0.3
Output current
ΔVOUT1 – IOUT1
(DC-DC Converter section)
-100
(A)
-50
0
Output current
IOUT1
1.5
VIN1 =8V , VOUT1 = 3.3V
L = 15μH , COUT1 = 22μF
Ta = 25°C , LS : CRS20I40B
50
Output voltage
(mV)
Output voltage
ΔVOUT1
50
0.6
1.2
100
VIN1 = 24V , VOUT1 = 5V
L = 15μH , COUT1 = 22μF
Ta = 25°C , LS : CRS20I40B
0.3
0.9
ΔVOUT1 – IOUT1
(DC-DC Converter section)
100
0
0.6
Output current
ΔVOUT1 – IOUT1
(DC-DC Converter section)
-100
0.3
-50
-100
1.5
(A)
0
0.3
0.6
Output current
14
0.9
1.2
IOUT1
(A)
1.5
2013-11-01
TB7110F
η – IOUT1
η – IOUT1
90
90
VIN1 = 8V
VOUT1 = 5V
L = 15μH
COUT1 = 22μF
Ta = 25°C
LS : CRS20I40B
60
50
0
0.3
0.6
Output current
0.9
1.2
IOUT1
η
70
80
Efficiency
η
80
Efficiency
(%)
100
(%)
100
70
VIN1 = 12V
VOUT1 = 5V
L = 15μH
COUT1 = 22μF
Ta = 25°C
LS : CRS20I40B
60
50
1.5
0
(A)
0.3
0.6
Output current
η – IOUT1
0.9
1.2
IOUT1
1.5
(A)
η – IOUT1
100
90
90
VIN1 = 24V
VOUT1 = 5V
L = 15μH
COUT1 = 22μF
Ta = 25°C
LS : CRS20I40B
60
50
0
0.3
0.6
Output current
0.9
1.2
IOUT1
η
70
80
Efficiency
η
80
Efficiency
(%)
(%)
100
70
VIN1 = 8V
VOUT1 =3.3V
L = 15μH
COUT1 = 22μF
Ta = 25°C
LS : CRS20I40B
60
50
1.5
0
(A)
0.3
0.6
Output current
η – IOUT1
0.9
1.2
IOUT1
1.5
(A)
η – IOUT1
100
90
90
VIN1 = 12V
VOUT1 = 3.3V
L = 15μH
COUT1= 22μF
Ta = 25°C
LS : CRS20I40B
60
50
0
0.3
0.6
Output current
0.9
IOUT1
1.2
η
70
80
Efficiency
η
80
Efficiency
(%)
(%)
100
70
VIN1 = 24V
VOUT1 = 3.3V
L = 15μH
COUT1 = 22μF
Ta = 25°C
LS : CRS20I40B
60
50
1.5
(A)
0
0.3
0.6
Output current
15
0.9
IOUT1
1.2
1.5
(A)
2013-11-01
TB7110F
ΔVOUT2 – IOUT2
(Series regulator section)
Overcurrent Protection
(Series regulator section)
6
100
VIN2 = 5V ,
VOUT2 = 3.3V
Ta = 25°C
(mV)
5
VOUT2 = 3.3V
Ta = 25°C
ΔVOUT2
50
4
3
Output voltage
Output voltage
VOUT2
(V)
VIN2 = 5V
2
1
0
-50
-100
0
0
0.5
1
Output current
1.5
IOUT2
2
0
(A)
(dB)
R.R
Ripple rejection
(dB)
R.R
Ripple rejection
40
20
10
100
1k
Frequency f
10k
IOUT2
0.8
(A)
100
60
0
0.6
Ripple rejection
(Series regulator section)
VIN1 = VIN2 = 12V
VOUT2 = 3.3V
IOUT2 = 50mA
Ta = 25°C
80
0.4
Output current
Ripple rejection
(Series regulator section)
100
0.2
80
VIN1 = 24V
60
VIN1 = 12V
40
0
100k
(Hz)
VIN2 = 5V
VOUT2 = 3.3V
IOUT2 = 50mA
Ta = 25°C
20
10
100
1k
Frequency f
10k
100k
(Hz)
Startup Characteristics
(Internal Soft-Start Time)
VIN1 = 24V
VOUT1 = 5V
VOUT2 = 3.3V
Ta = 25°C
L = 15μH
Output voltage : VOUT1 (2V/div)
Output voltage : VOUT2 (2V/div)
EN input voltage:VEN:L→H
1 ms/div
16
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TB7110F
Package Dimensions
HSON8-P-0505-1.27
Unit: mm
Weight: 0.068 g (typ.)
17
2013-11-01
TB7110F
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 NEITHER INTENDED NOR WARRANTED FOR USE IN EQUIPMENTS 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 AND/OR SERIOUS PUBLIC IMPACT
("UNINTENDED USE"). Except for specific applications as expressly stated in this document, 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. IF YOU USE
PRODUCT FOR UNINTENDED USE, TOSHIBA ASSUMES NO LIABILITY FOR PRODUCT. For details, please contact your
TOSHIBA sales representative.
• 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
applicable export laws and regulations including, without limitation, 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.
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2013-11-01
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