IC-DC 参数 Datasheet PDF下载

iC-DC

preliminar y

Rev A3, Page 8/19

2-CHANNEL BUCK/BOOST DC/DC CONVERTER

ELECTRICAL CHARACTERISTICS

Operating conditions: VB = +4 V to +36 V, RREF = 20 kΩ ±1 %, Tj = -40°C to +125°C, reference is GND (GNDA = GND),

unless otherwise stated.

Item

No.

203

204

205

206

210

211

212

213

Symbol

Vt1()hys

Vt2()hi

Vt2()lo

Vt2()hys

Vs()lo

Isc()lo

Ilk()

V(VBR)

Parameter

Hysteresis VBR

Overvoltage Detection at VBR

Reset Overvoltage Detection at

VBR

Hysteresis VBR

Saturation Voltage lo at VBROK

Short-Circuit Current lo in

VBROK

Leakage Current in VBROK

Minimal Supply Voltage for

VBROK Function

Conditions

Min.

Vt1()hys = Vt1()hi

−

Vt1()lo

VBR increasing,

VBROK: open

→

lo

VBR decreasing,

VBROK: lo

→

open

Vt2()hys = Vt2()hi

−

Vt2()lo

I(VBROK) = 5 mA, VBROK = lo

V(VBROK) = 2..8 V, VBROK = lo

V(VBROK) = 0..8 V, VBROK = hi

I(VBROK) = 5 mA, VBROK = lo,

Vs(VBROK)lo < 0.4 V

LVBH = 22 µH ±20 %, Ri(LVBH) < 1.1

Ω,

CVH = 1 µF;

VB

≤

5 V, I(VH) = -50 mA,

VB > 5 V, I(VH) = -100 mA,

VB

≥

12 V, I(VH) = -200 mA,

VB

≥

24 V, I(VH) = -300 mA

tolerance ±30 %

-10

3.2

35

1

300

Typ.

600

40.4

37.6

2.8

4

0.4

50

10

42

Max.

mV

V

V

V

V

mA

µA

V

Unit

Switching Regulator VH, VH1, VH2

305 V()

Voltage at VH

7

7.25

7.25

7.25

1

7.75

7.75

7.75

7.75

8

8

8

8

1

V

V

V

V

µF

Ω

mV

307

308

309

CVH

RiVH

V()

Required Capacitor at VH

Permissible Internal Resistance

of Capacitor at VH

Voltage at VH1

versus VCC1, CVH1 = 1 µF,

VB

≤

5 V, I(VH1) = -50 mA,

VB > 5 V, I(VH1) = -100 mA,

VB

≥

12 V, I(VH1) = -200 mA,

VB

≥

24 V, I(VH1) = -300 mA

tolerance ±30 %

300

400

600

311

312

313

CVH1

RiCVH1

V()

Required Capacitor at VH1

Permissible Internal Resistance

of Capacitor at VH1

Voltage at VH2

1

1

µF

Ω

mV

versus VCC2, CVH2 = 1 µF,

VB

≤

5V, I(VH2) = -50 mA,

VB > 5 V, I(VH2) = -100 mA,

VB

≥

12 V, I(VH2) = -200 mA,

VB

≥

24 V, I(VH2) = -300 mA

tolerance ±30 %

300

400

600

315

316

330

331

332

333

334

335

CVH2

RiCVH2

ηVH

ηVH

ηVH1

ηVH1

ηVH2

ηVH2

Required Capacitor at VH2

Permissible Internal Resistance

of Capacitor at VH2

1

1

70

80

70

80

70

80

µF

Ω

%

%

%

%

%

%

Efficiency of Switching Converter VB = 4 V, V(VH) > 7 V, VB = VBR,

VH

VH1 > VCC1 + 800 mV, VH2 > VCC2 + 800 mV

Efficiency of Switching Converter VB = 6.5 V, V(VH) > 7 V, VB = VBR,

VH

VH1 > VCC1 + 800 mV, VH2 > VCC2 + 800 mV

Efficiency of Switching Converter VB = 4 V, V(VH) > 8.1 V, VB = VBR,

VH1

ENV1 = hi, ENV2 = lo

Efficiency of Switching Converter

VH1

Efficiency of Switching Converter VB = 4 V, V(VH) > 8.1 V, VB = VBR,

VH2

ENV1 = lo, ENV2 = hi

Efficiency of Switching Converter VB = 6.5 V, V(VH) > 8.1 V, VB = VBR,

VH2

ENV1 = lo, ENV2 = hi

Voltage at RREF

Permissible Resistor at RREF

resistor RREF = 20 kΩ ±1 %,

resistor RREF versus GNDA

±1 %

Bias, Oscillator and Reference RREF

401

402

403

V()

R()

Isc()

1.18

19.6

-3

1.24

1.3

34

-0.5

V

kΩ

mA

Short-Circuit Current lo in RREF V(RREF) = 0 V