LTC2977 datasheet(5/138 Pages) AD

5 / 138 page

LTM4664A

Rev. 0

For more information www.analog.com

ORDER INFORMATION

ELECTRICAL CHARACTERISTICS The

denotes the specifications which apply over the internal operating

junction temperature. TA = 25°C, VINS1 = 48V, and RUNn = 5V where n = stage # unless otherwise noted. See Figure 46 configuration

for setup. (Note 3)

SYMBOL

PARAMETER

CONDITIONS

MIN

TYP

MAX

UNITS

4:1 Divider Section

VINS1

Input DC Voltage Stage 1

Note 4

VINS2

Input DC Voltage Stage 2

Note 4

VOUT1 Range

VOUT1 Output Range

Note 4

VOUT2 Range

VOUT2 Output Range

Note 4

7.5V

14.5

Maximum Power

Maximum Output Power

All Conditions, Note 4

VOUT1(DC)

VOUT1 OUTPUT

Note 4, Based on Figure 49

VINS1 = 48V, RUN = 5V, IVOUT1 = 0A

23.5

24.5

VOUT2(DC)

VOUT2 OUTPUT

Note 4, Based on Figure 49

VINS2 = 24V, RUN = 5V, IVOUT2 = 0A

11.5

12.5

VUVLO

Undervoltage Lockout

INTVCC Falling

INTVCC Rising

4.85

5.05

IQ VINSn

VINS1, VINS2 Quiescent Current Each

Stage

RUNn = 0V

RUNn = 5V, No Switching

RUNn = 5V, Switching

150

1.6

µA

Overcurrent Protection Section

INSNSS1+

Stage 1 Current Sense+

INSNSS1+ = INSNSS1– = 60V

VOUT1 = 30V, RUNS1 = 5V

220

350

µA

INSNSS2+

Stage 2 Current Sense+

INSNSS2+ = INSNSS2– = 30V

VOUT2 = 15V, RUNS2 = 5V

220

350

µA

INSNSS1–

Stage 1 Current Sense–

INSNSS1+ = INSNSS1– = 60V,

RUNS1 = 0V

–5

µA

INSNSS2–

Stage 2 Current Sense–

INSNSS2+ = INSNSS2– = 30V,

RUNS2 = 0V

–5

µA

INSNSS1, INSNSS2

Threshold

Current Limit Threshold

for Each Stage

Pre Charge Balance

RVINS2F

VINS2 Resistance to GND

See Block Diagram (Note 10)

MΩ

RVF2

Resistance Between Pins

VINS2 to VINS2F

See Block Diagram

Part of a RC Filter Stage 2

kΩ

INSNSS1+ Balance

Current

Stage 1 Current Sense + Source

Pre-Balance Phase VINS1 = 60V

INSNSS1+ = INSNSS1– = 60V, VOUT1 = 15V , Timer = 1V

INSNSS2+ Balance

Current

Stage 2 Current Sense + Source

Pre-Balance Phase VINS2 = 30V

INSNSS2+ = INSNSS2– = 30V, VOUT2 = 10V, Timer = 1V

ISOURCE VOUTn

ISOURCE Current to Pre-Start Up Bal-

ance VOUTn and CFLYn, n = Stage #

INSNSSn = VINSn = 24V VOUTn = 10V, Timer = 0.8V

See Block Diagram

PART NUMBER

PAD OR BALL FINISH

PART MARKING

PACKAGE

TYPE

MSL

RATING

TEMPERATURE RANGE

(SEE NOTE 2)

DEVICE

FINISH CODE

LTM4664AIY#PBF

SAC305 (RoHS)

LTM4664AY

BGA

–40°C to 125°C

• Contact the factory for parts specified with wider operating temperature

ranges. *Pad or ball finish code is per IPC/JEDEC J-STD-609.

• Recommended LGA and BGA PCB Assembly and Manufacturing

Procedures

• LGA and BGA Package and Tray Drawings

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