BC3770 datasheet(7/45 Pages) FREESCALE

7 / 45 page

Analog Integrated Circuit Device Data



Freescale Semiconductor

BC3770

4.2

Electrical Characteristics

Table 4. BC3770 Electrical Characteristics

Characteristics noted under conditions: VVBUS = 5.0 V, VBATREG = 3.7 V, VVIO = 1.8 V, CVBUS = CPMID = 2.2 F, CVSYS = 10 F,

CCHGOUT = 4.7 F, CVL = 1.0 F, L = 1.0 H, TA = - 40 °C to 85 °C *). Typical values are at TA = 25°C, unless otherwise noted. (6)

Symbol

Characteristic

Min

Typ

Max

Unit

Notes

VBUS Supply

VBUS_OP

VVIO_OP

Operating Range

• On VBUS

•On VIO

4.0

1.6

—

6.2

3.3

VBUS_UVLO

UVLO Threshold

• VBUS rising, 200 mV Hysteresis, VBUSOK bit set to 1

3.6

3.8

4.0

VBUS_OVP

OVP Threshold

• VBUS rising to turn off converter, 200 mV Hysteresis

6.3

6.5

6.7

(7)

VAICL_TH

Adaptive-Input Current Limit (AICL) Threshold Range

• VBUS falling, Programmable in 100 mV steps, 4.5 V Default

4.3

—

4.9

IVBUS_OP

Adaptive-Input Current Limit (AICL) Threshold Range

• In charger enabled, IFAST_CHG = ISYS = 0 mA, SHDNB = H,

SUSPEN = 0

LX No switching, VVSYS = VBATREG = 4.4 V override

LX switching w/VSYS = 3.7 V in PWM

• USB suspended mode in SUSPEN=1

—

2.0

—

1.0

IIN_LIM

Input Current Limit Programmable Range

•500 mA default, test 100 mA, 500 mA, 900 mA and 1.9 A only in

production

100

—

2050

IIN_LIM Accuracy

• With respect to IIN_LIM = 100 mA

• With respect to IIN_LIM = 500 mA

• With respect to IIN_LIM = 900 mA

• With respect to IIN_LIM = 2000 mA

100

107

(7)

VBUS Pull-down Resistance

• Off in BOOST Mode

—

100

—



VL LDO Regulator

VOUT_VLLDO

Output Voltage

•VPMID = 5.0 V, ILOAD = 30 mA

4.65

4.8

—

ILOAD_LIM

Current Limit

•VVLLDO = 3.8 V

—

(7)

Switching Regulator

fSW

Switching Frequency

• In PWM mode

1.35

1.5

1.65

MHz

(7)

DMAX

Maximum Duty Cycle

—

DMIN

Minimum Duty Cycle

0.0

—

ILIM_CHG

Cycle-by-cycle Current Limit for Charger Mode

• For high-side MOSFET in charger mode

—

3.5

4.7

(7)

Minimum Output Capacitance

• For stability

-30%

—

F

(7)

Notes

Specifications over the TA range are assured by design, characterized, and correlated with process control.

Guaranteed by design, characterization, and correlation with process controls. Not fully tested in production.

BC3770 Datasheet(PDF) 7 Page - Freescale Semiconductor, Inc

BC3770 Datasheet(HTML) 7 Page - Freescale Semiconductor, Inc

Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45

Datasheet Download

Link URL