iC-DC

2-CHANNEL BUCK/BOOST DC/DC CONVERTER

Rev B1, Page 9/19

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

Symbol

Parameter

Conditions

Unit

No.

Min.

Typ.

Max.

404 fos

Oscillator Frequency

resistor RREF = 20 kΩ ±1 %,

resistor RREF versus GNDA

1.8

7

MHz

Linear Regulator VCC1

CFG1 = VCC1;

4.75

5

5.25

V

VB < 5 V, I(VCC1) = -60...10 mA,

VB ≥ 5 V, I(VCC1) = -100...10 mA,

VB ≥ 6.5 V, I(VCC1) = -150...10 mA,

VB ≥ 12 V, I(VCC1) = -200..10 mA,

VB ≥ 24 V, I(VCC1) = -250...10 mA

CFG1 = GNDA;

3.135

3.3

3.465

V

VB < 5 V, I(VCC1) = -100...10 mA,

VB ≥ 5 V, I(VCC1) = -150...10 mA,

VB ≥ 6.5 V, I(VCC1) = -200...10 mA,

VB ≥ 16 V, I(VCC1) = -300...10 mA,

VB ≥ 24 V, I(VCC1) = -350...10 mA,

503 Vr(CFG1)

Transmission Ratio of external

Voltage Divider R(VCC1/CFG1) /

R(CFG1/GNDA)

V(VCC1) =

(1 + R(VCC1/CFG1) / R(CFG1/GNDA)) *

V(RREF),

R(VCC1/CFG1) + R(CFG1/GNDA) =

10 kΩ...50 kΩ ±1 %, V(VCC1) = 1.5...5.5 V

0.2

3.5

504 CVCC1

Required Capacitor at VCC1

versus GNDA

tolerance ±30 %

1

4.7

µF

505 RiCVCC1

Permissible Internal Resistance

of Capacitor at VCC1

1

Ω

506 VCC1,lir

Line Regulation

I(VCC1) = -100 mA, VB = 8...30 V

-20

20

mV

507 VCC1,lor

Load Regulation

VB = 24 V, I(VCC1) = 0...200 mA

-20

20

mV

508 VCC1rip

Output Ripple

I(VCC1) = -100mA

10

mVpp

Linear Regulator VCC2

CFG2 = VCC2;

3.135

3.3

3.465

V

VB < 5 V, I(VCC2) = -100...10 mA,

VB ≥ 5 V, I(VCC2) = -150...10 mA,

VB ≥ 6.5 V, I(VCC2) = -200...10 mA,

VB ≥ 16 V, I(VCC2) = -300...10 mA,

VB ≥ 24 V, I(VCC2) = -350...10 mA

CFG2 = GNDA;

2.375

2.5

2.625

V

VB < 5 V, I(VCC2) = -150...10 mA,

VB ≥ 5 V, I(VCC2) = -200...10 mA,

VB ≥ 6.5 V, I(VCC2) = -250...10 mA,

VB ≥ 12 V, I(VCC2) = -300...10 mA,

VB ≥ 24 V, I(VCC2) = -350...10 mA

603 Vr(VCC2)

Transmission Ratio of external

Voltage Divider R(VCC2/CFG2) /

R(CFG2/GNDA)

V(VCC2) =

(1 + R(VCC2/CFG2) / R(CFG2/GNDA)) *

V(RREF),

R(VCC2/CFG2) + R(CFG2/GNDA) =

10 kΩ...50 kΩ ±1 %, V(VCC2) = 1.5...5.5 V

0.2

3.5

604 CVCC2

Required Capacitor at VCC2

versus GNDA

tolerance ±30 %

1

4.7

µF

605 RiCVCC2

Permissible Internal Resistance

of Capacitor at VCC2

1

Ω

606 VCC2,lir

Line Regulation

I(VCC2) = -100 mA, VB = 8...30 V

-20

20

mV

607 VCC2,lor

Load Regulation

VB = 24 V, I(VCC2) = 0...200 mA

-20

20

mV

608 VCC2rip

Output Ripple

I(VCC2) = -100mA

10

mVpp