LM5010MH/NOPB National Semiconductor, LM5010MH/NOPB Datasheet - Page 16

• Manufacturer Part Number: LM5010MH/NOPB
• Description: IC BUCK ADJ 1A 14TSSOP
• Manufacturer: National Semiconductor
• Type: Step-Down (Buck)r

Specifications of LM5010MH/NOPB

• Internal Switch(s): Yes
• Synchronous Rectifier: No
• Number Of Outputs: 1
• Voltage - Output: 2.5 ~ 70 V
• Current - Output: 1A
• Frequency - Switching: 1MHz
• Voltage - Input: 8 ~ 75 V
• Operating Temperature: -40°C ~ 125°C
• Mounting Type: Surface Mount
• Package / Case: 14-TSSOP Exposed Pad, 14-eTSSOP 14-HTSSOP
• Primary Input Voltage: 75V
• No. Of Outputs: 1
• Output Voltage: 70V
• Output Current: 1A
• Voltage Regulator Case Style: TSSOP
• No. Of Pins: 14
• Operating Temperature Range: -40°C To +125°C
• Svhc: No SVHC (15-Dec-2010)
• Rohs Compliant: Yes
• Dc: 1030
• For Use With: LM5010 EVAL - BOARD EVALUATION LM5010
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Power - Output: -
• Other names: *LM5010MH; *LM5010MH/NOPB; LM5010MH

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Applications Information
FIGURE 16. Efficiency vs Load Current and V
FIGURE 15. Efficiency vs V
Circuit of Figure 14
Circuit of Figure 14
IN
(Continued)
20119934
20119935
IN
16
INCREASING THE CURRENT LIMIT THRESHOLD
The current limit threshold is nominally 1.25A, with a mini-
mum guaranteed value of 1.0A. If, at maximum load current,
the lower peak of the inductor current (I
exceeds 1.0A, resistor R
and I
exceed that lower peak current. This resistor diverts some of
the recirculating current from the internal sense resistor so
that a higher current level is needed to switch the internal
current limit comparator. I
where I
the minimum ripple current calculated using Equation 10.
R
CL
is calculated from:
SEN
O(max)
FIGURE 17. Output Voltage Ripple vs V
to increase the current limit threshold to equal or
FIGURE 18. Frequency vs V
is the maximum load current, and I
Circuit of Figure 14
Circuit of Figure 14
CL
PK-
must be added between S
is calculated from:
PK-
IN
in Figure 13)
20119937
20119936
IN
OR(min)
GND
(11)
is