34702 datasheet(13/38 Pages) FREESCALE

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Analog Integrated Circuit Device Data

Freescale Semiconductor

34702

ELECTRICAL CHARACTERISTICS

DYNAMIC ELECTRICAL CHARACTERISTICS

BOOST REGULATOR

Boost Regulator MOSFET Maximum ON Time (21)

tON

–24–

µs

Boost Regulator Control Loop Propagation Delay (21)

tBST_PD

–50–

Boost Switching Node VBD Rise Time (21)

IBST = 20 mA

tB_RISE

–5.0

Boost Switching Node VBD Fall Time (21)

IBST = 20 mA

tB_FALL

–3.0

LINEAR REGULATOR (LDO)

Fault Condition Time-Out

tFAULT

8.0

Retry Timer Cycle

tRet

100

120

Reset Monitor (RST)

Monitoring LFB Pin Delay

tD_RST_LFB

12–28

µs

Monitoring INV Pin Delay

tD_RST_INV

12–28

µs

SCA, SCL PIN, I2C BUS (STANDARD)

SCL Clock Frequency (21)

fSCL

–

100

kHz

Bus Free Time Between a STOP and a START Condition (21)

tBUF

4.7

–

µs

Hold Time (Repeated) START Condition (After this period, the first clock

pulse is generated.) (21)

tHD-STA

4.0

–

µs

Low Period of the SCL Clock (21)

tLOW

4.7

–

µs

High Period of the SCL Clock (21)

tHIGH

4.0

–

µs

SDA Fall Time from VIH_MAX to VIL_MIN, Bus Capacitance 10 pF to 400

pF, 3.0 mA Sink Current (21), (23)

–

250

Setup Time for a Repeated START Condition (21)

tSU-STA

4.7

–

µs

Data Hold Time for I2C Bus Devices (21), (22)

tHD-DAT

0.0

–

µs

Data Setup Time (21)

tSU-DAT

250

–

Setup Time for STOP Condition (21)

tSU-STO

4.0

–

µs

Capacitive Load for Each Bus Line (21)

–

400

Notes

21.

Design information only. This parameter is not production tested.

22.

The device provides an internal hold time of at least 300 ns for the SDA signal (refer to the V

IH_MIN of the SCL signal) to bridge the

undefined region of the falling edge of SCL.

23.

VIH = High level voltage on I²C bus and VIL = Low level voltage on I²C bus

Table 4.

DYNAMIC ELECTRICAL CHARACTERISTICS (continued)

Characteristics noted under conditions -40°C ≤ TA ≤ 85°C unless otherwise noted. Input voltages VIN1 = VIN2 = 3.3 V using

the typical application circuit (see Figures 33) unless otherwise noted.

Characteristic

Symbol

Min

Typ

Max

Unit

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