LTM4709

4

Rev. 0

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ELECTRICAL CHARACTERISTICS The

l

denotes the specifications which apply over the full operating

temperature range, otherwise specifications are at TA = 25°C (Note 2), COUT = 10µF, per the typical application.

Note 1: Stresses beyond those listed under Absolute Maximum Ratings

may cause permanent damage to the device. Exposure to any Absolute

Maximum Rating condition for extended periods may affect device

reliability and lifetime.

Note 2: The LTM4709 is tested under pulsed loading conditions such

that TJ ≈ TA. The LTM4709E is guaranteed to meet performance

specifications from 0°C to 125°C operating junction temperature range.

The LTM4709E specifications over the –40°C to 125°C operating junction

temperature range are assured by design, characterization and correlation

with statistical process controls. The LTM4709I is guaranteed to meet

performance specifications over the –40°C to 125°C operating junction

temperature range, and the LTM4709H is guaranteed over the –40°C to

150°C operating junction temperature range. High junction temperatures

degrade operating lifetimes. The maximum ambient temperature

consistent with these specifications is determined by specific operating

conditions in conjunction with board layout, the rated package thermal

impedance and other environmental factors.

Note 3: To maintain proper performance and regulation, the BIAS supply

voltage must be higher than the input voltage VIN. For the output voltage

VOUT, the BIAS voltage must satisfy the following conditions: 2.375V ≤

VBIAS ≤ 5.5V and VBIAS ≥ (VOUT + 1.2V).

Note 4: Dropout voltage, VDO, is the minimum input-to-output voltage

difference at a specified output current. In dropout, the output voltage

equals VIN – VDO.

Note 5: Operating conditions are limited by maximum junction

temperature. See output current thermal derating curves for different

VIN, VOUT, and TA in Figure 7 to Figure 13. The regulated output voltage

specification does not apply to all possible combinations of input voltage

and output current. When operating at maximum output current, limit the

input voltage range to VIN – VOUT ≤ 300mV.

SYMBOL

PARAMETER

CONDITIONS

MIN

TYP

MAX UNITS

IREF(START-UP)

Fast Start-Up Ref Pin Current

2

mA

VTH(START-UP)

Fast Start-Up Turn Off Threshold

Measured as Percentage of Final REF Pin Voltage

l

96

98.9

101.5

%

UVLO (BIAS)

VBIAS Undervoltage Lockout

EN = VBIAS, VIN = 0.9V, VOUT = 0.5V, VBIAS Rising

EN = VBIAS, VIN = 0.9V, VOUT = 0.5V, VBIAS Falling

l

l

2.16

2.02

2.21

2.06

2.25

2.10

V

V

VIOC

Input to Output Differential Voltage

Control

VIOC Amplifier Gain

VIOC Amplifier Offset

VIOC Pin Source Current: VBIAS > VIOC + 1V

VIOC Pin Sink Current: VBIAS > VIOC + 1V

l

l

790

200

1

800

20

810

V/V

mV

µA

µA

VOL

Logic-0 State of VO10, VO11, VO12,

VO20, VO21, VO22, VO30, VO31, VO32

l

0.3

V

VOZ

Logic-Hi-Z State of VO10, VO11, VO12,

VO20, VO21, VO22, VO30, VO31, VO32

l

0.95

1.15

V

VOH

Logic-1 State of VO10, VO11, VO12,

VO20, VO21, VO22, VO30, VO31, VO32

l

1.9

V

ICTRL

Pin Current of VO10, VO11, VO12,

VO20, VO21, VO22, VO30, VO31, VO32

Apply 2.5V to Output Control Pins

50

μA

VEN

EN Pin Threshold

EN Rising, VBIAS = 2.375V

Hysteresis

l

1.20

1.26

80

1.32

V

mV

IEN

EN Pin Current

VEN = 0V, VBIAS = 5.5V

VEN = 1.3V, VBIAS = 5.5V

VEN = 5.5V, VBIAS = 0V

0.1

10

±1

20

µA

µA

µA