tb7101f TOSHIBA Semiconductor CORPORATION, tb7101f Datasheet

tb7101f

Manufacturer Part Number

tb7101f

Description

Step-down Dc-dc Converter Ic

Manufacturer

TOSHIBA Semiconductor CORPORATION

Datasheet

1.TB7101F.pdf (17 pages)

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Step-down DC-DC Converter IC

The TB7101F is a single-chip step-down DC-DC converter IC.

Equipped with a built-in high-speed and low on-resistance power

MOSFET, and utilizing a synchronous rectifier circuit, this IC can

achieve high efficiency.

Features

Marking (Note 1)/Pin Assignment

Due to its MOS structure, this product is sensitive to electrostatic discharge. Handle with care.

N Capable of high current drive (I

N Operating voltage (V

N Fixed output voltage : V

N High oscillation frequency of 1 MHz (typ.), making it possible to use small external components.

N Uses internal phase compensation, achieving high efficiency using only an inductor and two capacitors.

N Built-in current mode architecture with excellent fast load response.

N A small surface-mount type ceramic capacitor can be used as an output smoothing capacitor.

N Housed in a small surface-mount package (PS-8) with a low thermal resistance.

N Built-in undervoltage lock out (U.V.L.O), heatprotection, and overcurrent protection.

only a few external components.

* The Lot number comprises three numerals. The first numeral represents the last digit of the year of

manufacture, and the following two digits indicate the week of manufacture, beginning with 01 and continuing to

either 52 or 53.

TB7101F(T5L1.2,F)

TB7101F(T5L1.5,F)

TB7101F(T5L1.8,F)

TB7101F(T5L2.5,F)

TB7101F(T5L3.3,F)

Type

TB7101F(T5L1.2,F) , TB7101F(T5L1.5,F)

TB7101F(T5L1.8,F) , TB7101F(T5L2.5,F)

TB7101F(T5L3.3,F)

) range: 2.7 to 5.5 V.

Toshiba BiCD Integrated Circuit Silicon Monolithic

OUT

Manufacturing week Code

Manufacturing year Code

voltage(V)

(The first week of the year is 01, continuing up to 52 or 53)

(Last digit of the year of manufacture)

Output

= 1.2V / 1.5V / 1.8V / 2.5V / 3.3V(typ.)

1.2

1.5

1.8

2.5

3.3

OUT

= maximum of 1 A), using

Type name

7101A

7101B

7101C

7101D

7101E

Note 1: D on the lower left of the marking indicates Pin 1.

TB7101F(T5L1.2,F) , TB7101F(T5L1.5,F)

TB7101F(T5L1.8,F) , TB7101F(T5L2.5,F)

TB7101F(T5L3.3,F)

Weight

: 0.017 g (typ.)

SON8-P-0303-0.65A

Type name

Lot No.

1 : PGND

2 : V

3 : EN

4 : SGND

5 : N.C.

6 : N.C.

7 : V

8 : L

2007-09-06

OUT

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tb7101f Summary of contents

Page 1

... Toshiba BiCD Integrated Circuit Silicon Monolithic TB7101F(T5L1.2,F) , TB7101F(T5L1.5,F) TB7101F(T5L1.8,F) , TB7101F(T5L2.5,F) TB7101F(T5L3.3,F) Step-down DC-DC Converter IC The TB7101F is a single-chip step-down DC-DC converter IC. Equipped with a built-in high-speed and low on-resistance power MOSFET, and utilizing a synchronous rectifier circuit, this IC can achieve high efficiency. Features N Capable of high current drive (I ...

Page 2

... N.C. No connection Output voltage pin. Output voltage is set to 1.2V / 1.5V / 1.8V / 2.5V / 3.3V(typ.) internally. OUT 8 L Switching pin. This pin is connected to high-side pch MOS FET and low-side nch MOS FET TB7101F(T5L1.2,F) , TB7101F(T5L1.5,F) TB7101F(T5L1.8,F) , TB7101F(T5L2.5,F) TB7101F(T5L3.3,F) Current Detection DRIVER PWM Control comparator Logic + - DRIVER Phase ...

Page 3

... Overheat state operation OSC Low Voltage operation OSC TB7101F(T5L1.2,F) , TB7101F(T5L1.5,F) TB7101F(T5L1.8,F) , TB7101F(T5L2.5,F) TB7101F(T5L3.3, increase Hysteresis: 25GC (typ.) OSC : Internal oscillator output voltage I : Load current OUT V : Output voltage OUT Output voltage of error amplifier V : COMP I : Inductor current ...

Page 4

... Precautions”/”Derating Concept and Methods”) and individual reliability data (i.e. reliability test report and estimated failure rate, etc) when designing in order to ensure the appropriate reliability. Thermal Resistance Characteristic Characteristics Thermal resistance, channel and ambient (Note 2) Glass epoxy board Material: FR-4 25.4 b 25.4 b 0.8 (Unit: mm) TB7101F(T5L1.2,F) , TB7101F(T5L1.5,F) TB7101F(T5L1.8,F) , TB7101F(T5L2.5,F) TB7101F(T5L3.3,F) Symbol Rating Unit V -0.3 ...

Page 5

... Oscillation frequency f OSC(2) tss (1) Soft start time tss (2) V Detection UV Undervoltage protection ûV Hysteresis UV Protection function (reference data) DTB7101F(T5L1.2,F) T Detection Overheat SD protection Hysteresis ûT SD TB7101F(T5L1.2,F) , TB7101F(T5L1.5,F) TB7101F(T5L1.8,F) , TB7101F(T5L2.5,F) TB7101F(T5L3.3,F) Test Test condition circuit - - - OUT V = 2.7V 2.7V =2.7V OUT - V = 5V, V ...

Page 6

... Oscillation frequency f OSC(2) tss (1) Soft start time tss (2) V Detection UV Undervoltage protection ûV Hysteresis UV Protection function (reference data) DTB7101F(T5L1.5,F) T Detection Overheat SD protection Hysteresis ûT SD TB7101F(T5L1.2,F) , TB7101F(T5L1.5,F) TB7101F(T5L1.8,F) , TB7101F(T5L2.5,F) TB7101F(T5L3.3,F) Test Test condition circuit - - - OUT V = 2.7V 2.7V =2.7V OUT - V = 5V, V ...

Page 7

... Oscillation frequency f OSC(2) tss (1) Soft start time tss (2) V Detection UV Undervoltage protection ûV Hysteresis UV Protection function (reference data) DTB7101F(T5L1.8,F) T Detection Overheat SD protection Hysteresis ûT SD TB7101F(T5L1.2,F) , TB7101F(T5L1.5,F) TB7101F(T5L1.8,F) , TB7101F(T5L2.5,F) TB7101F(T5L3.3,F) Test Test condition circuit - - - OUT V = 2.8V 2.8V =2.8V OUT - V = 5V, V ...

Page 8

... Oscillation frequency f OSC(2) tss (1) Soft start time tss (2) V Detection UV Undervoltage protection ûV Hysteresis UV Protection function (reference data) DTB7101F(T5L2.5F) T Detection Overheat SD protection Hysteresis ûT SD TB7101F(T5L1.2,F) , TB7101F(T5L1.5,F) TB7101F(T5L1.8,F) , TB7101F(T5L2.5,F) TB7101F(T5L3.3,F) Test Test condition circuit - - - OUT V = 3.5V 3.5V =3.5V OUT - V = 5V, V ...

Page 9

... Oscillation frequency f OSC(2) tss (1) Soft start time tss (2) V Detection UV Undervoltage protection ûV Hysteresis UV Protection function (reference data) DTB7101F(T5L3.3,F) T Detection Overheat SD protection Hysteresis ûT SD TB7101F(T5L1.2,F) , TB7101F(T5L1.5,F) TB7101F(T5L1.8,F) , TB7101F(T5L2.5,F) TB7101F(T5L3.3,F) Test Test condition circuit - - - OUT V = 4.3V 4.3V =4.3V OUT - V = 5V, V ...

Page 10

... L maximum current [ (min). Therefore select an inductor whose current rating is no lower than the LX(MAX) peak switch current [1.15 A (min)] of the TB7101F. If the current rating is exceeded, the inductor becomes saturated, leading to an unstable DC-DC converter operation and V = 3.3 V, the required inductance can be calculated as below. Be sure to select an inductor ...

Page 11

... N There is an antistatic diode between the ENB and V satisfy the rating < 0.3 V ENB operation becomes unstable due to switching noise under a heavy load, please mount a by-pass capacitor C between the SGND pin and the VIN pin. TB7101F(T5L1.2,F) , TB7101F(T5L1.5,F) TB7101F(T5L1.8,F) , TB7101F(T5L2.5,F) TB7101F(T5L3.3, OSC pins ...

Page 12

... Load Current I OUT V – I OUT OUT 1.545 1.53 1.515 V =5 1.5 1.485 1.47 TB7101F(T5L1.5, 25°C 1.455 0.001 0.01 0.1 Load Current I OUT TB7101F(T5L1.2,F) , TB7101F(T5L1.5,F) TB7101F(T5L1.8,F) , TB7101F(T5L2.5,F) TB7101F(T5L3.3,F) 2.575 2.550 2.525 V 2.5 2.475 2.450 2.425 1 0.001 Load Current I 1.854 1.836 1.818 1.8 1.782 1.764 1.746 1 0.001 (A) 1.545 1.53 1 ...

Page 13

... IN V – V OUT IN 1.854 1.836 I = 0.2A OUT 1.818 1.8 1.782 1.764 TB7101F(T5L1.8, 25°C 1.746 Input Voltage V (V) IN TB7101F(T5L1.2,F) , TB7101F(T5L1.5,F) TB7101F(T5L1.8,F) , TB7101F(T5L2.5,F) TB7101F(T5L3.3,F) V – I OUT OUT 1.236 1.224 1.212 V =3.3V IN 1.2 1.188 1.176 TB7101F(T5L1.2, 25°C 1.164 0.001 0.01 0.1 Load Current I OUT V – V ...

Page 14

... Load Current I (A) OUT ï – I OUT 100 3. TB7101F(T5L1.8, 25° 0.2 0.4 0.6 0.8 1 Load Current I (A) OUT TB7101F(T5L1.2,F) , TB7101F(T5L1.5,F) TB7101F(T5L1.8,F) , TB7101F(T5L2.5,F) TB7101F(T5L3.3,F) 6 100 0.2 Load Current I 100 0.2 Load Current I 14 ï – I OUT V = 5.0V IN TB7101F(T5L2.5, 25° ...

Page 15

... Load Current I (A) OUT ï – I OUT 100 80 V =3. TB7101F(T5L1.2, 25° 0.2 0.4 0.6 0.8 1 Load Current I (A) OUT TB7101F(T5L1.2,F) , TB7101F(T5L1.5,F) TB7101F(T5L1.8,F) , TB7101F(T5L2.5,F) TB7101F(T5L3.3,F) ï – I OUT 100 80 V =5. TB7101F(T5L1.5, 25° 0.2 0.4 0.6 Load Current I OUT ï – I OUT 100 ...

Page 16

... Package dimensions SON8-P-0303-0.65A 8 0.1 max 1 0.33 H0.05 0.05 0.475 0.65 2.9 H0.1 S 0.025 S : 0.017 g (Typ.) Weight TB7101F(T5L1.2,F) , TB7101F(T5L1.5,F) TB7101F(T5L1.8,F) , TB7101F(T5L2.5,F) TB7101F(T5L3.3, 0. Unit: mm 0.17 H0.02 2007-09-06 ...

Page 17

... Please use these products in this document in compliance with all applicable laws and regulations that regulate the inclusion or use of controlled substances. Toshiba assumes no liability for damage or losses occurring as a result of noncompliance with applicable laws and regulations. TB7101F(T5L1.2,F) , TB7101F(T5L1.5,F) TB7101F(T5L1.8,F) , TB7101F(T5L2.5,F) TB7101F(T5L3.3,F) ...

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