LTM4620A datasheet(4/36 Pages) LINER

4 / 36 page

LTM4650A-1

4650a1f

For more information www.linear.com/LTM4650A-1

ELECTRICAL CHARACTERISTICS The

denotes the specifications which apply over the specified internal

operating temperature range. Specified as each individual output channel. TA = 25°C (Note 2), VIN = 12V and VRUN1, VRUN2 at 5V

unless otherwise noted. Per the typical application in Figure 34.

SYMBOL

PARAMETER

CONDITIONS

MIN

TYP

MAX

UNITS

IPGOOD

PGOOD Leakage Current

VPGOOD = 5V

±5

µA

VPGOOD

PGOOD Trip Level

VFB with Respect to Set Output Voltage

VFB Ramping Negative

VFB Ramping Positive

–10

INTVCC Linear Regulator

VINTVCC

Internal VCC Voltage

6V < VIN < 16V

4.8

5.2

VINTVCC Load Regulation INTVCC Load Regulation

ICC = 0mA to 50mA

0.5

VEXTVCC

EXTVCC Switchover Voltage

EXTVCC Ramping Positive

4.5

4.7

VEXTVCC(DROP)

EXTVCC Dropout

ICC = 20mA, VEXTVCC = 5V

100

VEXTVCC(HYST)

EXTVCC Hysteresis

220

Oscillator and Phase-Locked Loop

Frequency Nominal

Nominal Frequency

fSET = 1.2V

450

500

550

kHz

Frequency Low

Lowest Frequency

fSET = 0V

210

250

290

kHz

Frequency High

Highest Frequency

fSET > 2.4V, Up to INTVCC

700

780

860

kHz

fSET

Frequency Set Current

µA

RMODE_PLLIN

MODE_PLLIN Input Resistance

250

kΩ

CLKOUT

Phase (Relative to VOUT1)

PHASMD = GND

PHASMD = Float

PHASMD = INTVCC

120

Deg

CLK High

CLK Low

Clock High Output Voltage

Clock Low Output Voltage

0.2

Differential Amplifier

AV Differential Amp

Gain

V/V

RIN

Input Resistance

Measured at DIFFP Input

kΩ

VOS

Input Offset Voltage

VDIFFP = VDIFFOUT = 1.2V, IDIFFOUT = 100µA

PSRR Differential Amp Power Supply Rejection Ratio

4.5V < VIN < 16V

ICL

Maximum Output Current

VOUT(MAX)

Maximum Output Voltage

IDIFFOUT = 300µA

INTVCC – 1.4

GBW

Gain Bandwidth Product

MHz

VTEMP

Diode Connected PNP

I = 100µA

0.6

Temperature Coefficient

–2.2

mV/C

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 LTM4650A-1 is tested under pulsed load conditions such that

TJ ≈ TA. The LTM4650AE-1 is guaranteed to meet specifications from

0°C to 125°C internal temperature. Specifications over the –40°C to

125°C internal operating temperature range are assured by design,

characterization and correlation with statistical process controls. The

LTM4650AI-1 is guaranteed over the full –40°C to 125°C internal

operating temperature range. Note that 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: Two outputs are tested separately and the same testing condition

is applied to each output.

Note 4: The switching frequency is programmable from 250kHz to 780kHz.

Note 5: These parameters are tested at wafer sort.

Note 6: See output current derating curve for different ambient

temperature.

Note 7: Total DC output voltage error includes all errors over

temperature – reference, line and load regulation as well as the tolerance

of the integrated top feedback resistor.

LTM4620A Datasheet(PDF) 4 Page - Linear Technology

LTM4620A Datasheet(HTML) 4 Page - Linear Technology

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

Datasheet Download

Link URL