National Semiconductor LM3420-4.2 Technical data

查询LM3420AM5X-8.2供应商

LM3420-4.2, -8.2, -8.4, -12.6, -16.8
Lithium-Ion Battery Charge Controller

LM3420-4.2, -8.2, -8.4, -12.6, -16.8 Lithium-Ion Battery Charge Controller

July 2000

General Description

The LM3420 series of controllers are monolithic integrated
circuits designed for charging and end-of-charge control for
Lithium-Ion rechargeable batteries. The LM3420 is available
in fivefixed voltage versions for one through four cell charger
applications (4.2V, 8.2V/8.4V, 12.6V and 16.8V respec­tively).

Included in a very small package is an (internally compen­sated) op amp, a bandgap reference, an NPN output transis­tor, and voltage setting resistors. The amplifier’s inverting in­put is externally accessible for loop frequency
compensation. The output is an open-emitter NPN transistor
capable of driving up to 15 mAof output current into external
circuitry.

A trimmed precision bandgap reference utilizes temperature
drift curvature correction for excellent voltage stability over
the operating temperature range. Available with an initial tol­erance of 0.5% for the A grade version, and 1% for the stan­dard version, the LM3420 allows for precision end-of-charge
control for Lithium-Ion rechargeable batteries.

The LM3420 is available in a sub-miniature 5-lead SOT23-5
surface mount package thus allowing very compact designs.

Features

n Voltage options for charging 1, 2, 3 or 4 cells
n Tiny SOT23-5 package
n Precision (0.5%) end-of-charge control
n Drive capability for external power stage
n Low quiescent current, 85 µA (typ.)

Applications

n Lithium-Ion battery charging
n Suitable for linear and switching regulator charger

designs

Typical Application and Functional Diagram

DS012359-1

Typical Constant Current/Constant Voltage

Li-Ion Battery Charger

DS012359-2

LM3420 Functional Diagram

SIMPLE SWITCHER®is a registered trademark of National Semiconductor Corporation.

© 2000 National Semiconductor Corporation DS012359 www.national.com

Connection Diagrams and Order Information

5-Lead Small Outline Package (M5)

DS012359-3

*No internal connection, but should be soldered to PC board for best heat
transfer.

Top View

For Ordering Information

See

Figure 1

See NS Package Number MF05A

LM3420-4.2/LM3420-8.2/LM3420-8.4/LM3420-12.6/LM3420-16.8

in this Data Sheet

Actual Size

DS012359-4

www.national.com 2

LM3420-4.2/LM3420-8.2/LM3420-8.4/LM3420-12.6/LM3420-16.8

Absolute Maximum Ratings (Note 1)

If Military/Aerospace specified devices are required,
please contact the National Semiconductor Sales Office/
Distributors for availability and specifications.

ESD Susceptibility (Note 3)

Human Body Model 1500V

See AN-450 “Surface Mounting Methods and Their Effect
on Product Reliability” for methods on soldering
surface-mount devices.

Input Voltage V(IN) 20V
Output Current 20 mA
Junction Temperature 150˚C
Storage Temperature −65˚C to +150˚C
Lead Temperature

Vapor Phase (60 seconds) +215˚C

Operating Ratings (Notes 1, 2)

Ambient Temperature Range −40˚C ≤ T
Junction Temperature Range −40˚C ≤ T
Output Current 15 mA

≤ +85˚C

A

≤ +125˚C

J

Infrared (15 seconds) +220˚C

Power Dissipation (T

(Note 2) 300 mW

= 25˚C)

A

LM3420-4.2
Electrical Characteristics

Specifications with standard type face are for TJ= 25˚C, and those with boldface type apply over full Operating Tempera­ture Range. Unless otherwise specified, V(IN) = V

REG,VOUT

Symbol Parameter Conditions Typical LM3420A-4.2 LM3420-4.2 Units

V

REG

Regulation Voltage I

Regulation Voltage I

= 1 mA 4.2 V

OUT

=1mA

OUT

Tolerance

I

q

G

m

A

V

V

SAT

I

L

R

f

Quiescent Current I

Transconductance 20 µA ≤ I
∆I

/∆V

OUT

REG

Voltage Gain 1V ≤ V
∆V

/∆V

OUT

REG

Output Saturation V(IN) = V
(Note 7) I
Output Leakage V(IN) = V
Current V

= 1 mA 85 µA

OUT

≤ 1 mA 3.3 mA/mV

OUT

V

= 2V 1.3/0.75 1.0/0.50 mA/mV(min)

OUT

1mA≤I
V

OUT

≤ 15 mA 6.0 mA/mV

OUT

= 2V 3.0/1.5 2.5/1.4 mA/mV(min)

OUT

≤ V

− 1.2V (−1.3) 1000 V/V

REG

RL= 200Ω (Note 6) 550/250 450/200 V/V(min)
1V ≤ V
R

L

OUT

OUT

OUT

≤ V

− 1.2V (−1.3) 3500 V/V

REG

=2kΩ 1500/900 1000/700 V/V(min)

+100 mV 1.0 V

REG

= 15 mA 1.2/1.3 1.2/1.3 V(max)

−100 mV 0.1 µA

REG

= 0V 0.5/1.0 0.5/1.0 µA(max)
Internal Feedback 75 kΩ
Resistor (Note 8) 94 94 kΩ(max)

E

n

Output Noise I

= 1 mA, 10 Hz ≤ f ≤ 10 kHz 70 µV

OUT

Voltage

= 1.5V.

(Note 4) Limit Limit (Limits)

(Note 5) (Note 5)

4.221/4.242 4.242/4.284 V(max)

4.179/4.158 4.158/4.116 V(min)

±

0.5/±1

±1/±

2 %(max)

110/115 125/150 µA(max)

56 56 kΩ(min)

RMS

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LM3420-8.2
Electrical Characteristics

Specifications with standard type face are for TJ= 25˚C, and those with boldface type apply over full Operating Tempera­ture Range. Unless otherwise specified, V(IN) = V

REG,VOUT

Symbol Parameter Conditions Typical LM3420A-8.2 LM3420-8.2 Units

V

REG

Regulation Voltage I

Regulation Voltage I

= 1 mA 8.2 V

OUT

=1mA

OUT

Tolerance

I

q

G

m

A

V

LM3420-4.2/LM3420-8.2/LM3420-8.4/LM3420-12.6/LM3420-16.8

V

SAT

I

L

R

f

Quiescent Current I

Transconductance 20 µA ≤ I
∆I

/∆V

OUT

REG

Voltage Gain 1V ≤ V
∆V

/∆V

OUT

REG

Output Saturation V(IN) = V
(Note 7) I
Output Leakage V(IN) = V
Current V

= 1 mA 85 µA

OUT

≤ 1 mA 3.3 mA/mV

OUT

V

= 6V 1.3/0.75 1.0/0.50 mA/mV(min)

OUT

1mA≤I
V

OUT

≤ 15 mA 6.0 mA/mV

OUT

= 6V 3.0/1.5 2.5/1.4 mA/mV(min)

OUT

≤ V

− 1.2V (−1.3) 1000 V/V

REG

RL= 470Ω (Note 6) 550/250 450/200 V/V(min)
1V ≤ V
R

=5kΩ 1500/900 1000/700 V/V(min)

L

OUT

OUT

OUT

≤ V

REG

− 1.2V (−1.3) 3500 V/V

REG

+100 mV 1.0 V

= 15 mA 1.2/1.3 1.2/1.3 V(max)

−100 mV 0.1 µA

REG

= 0V 0.5/1.0 0.5/1.0 µA(max)
Internal Feedback 176 kΩ
Resistor (Note 8) 220 220 kΩ(max)

E

n

Output Noise I

= 1 mA, 10 Hz ≤ f ≤ 10 kHz 140 µV

OUT

Voltage

= 1.5V.

(Note 4) Limit Limit (Limits)

(Note 5) (Note 5)

8.241/8.282 8.282/8.364 V(max)

8.159/8.118 8.118/8.036 V(min)

±

0.5/±1

±1/±

2 %(max)

110/115 125/150 µA(max)

132 132 kΩ(min)

RMS

LM3420-8.4
Electrical Characteristics

Specifications with standard type face are for TJ= 25˚C, and those with boldface type apply over full Operating Tempera­ture Range. Unless otherwise specified, V(IN) = V

REG,VOUT

Symbol Parameter Conditions Typical LM3420A-8.4 LM3420-8.4 Units

V

REG

Regulation Voltage I

Regulation Voltage I

= 1 mA 8.4 V

OUT

=1mA

OUT

Tolerance

I

q

G

m

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Quiescent Current I

= 1 mA 85 µA

OUT

Transconductance 20 µA ≤ I
∆I

OUT

/∆V

REG

V

= 6V 1.3/0.75 1.0/0.50 mA/mV(min)

OUT

1mA≤I
V

= 6V 3.0/1.5 2.5/1.4 mA/mV(min)

OUT

≤ 1 mA 3.3 mA/mV

OUT

≤ 15 mA 6.0 mA/mV

OUT

= 1.5V.

(Note 4) Limit Limit (Limits)

(Note 5) (Note 5)

8.442/8.484 8.484/8.568 V(max)

8.358/8.316 8.316/8.232 V(min)

±

0.5/±1

±1/±

2 %(max)

110/115 125/150 µA(max)

LM3420-8.4
Electrical Characteristics

Specifications with standard type face are for TJ= 25˚C, and those with boldface type apply over full Operating Tempera­ture Range. Unless otherwise specified, V(IN) = V

Symbol Parameter Conditions Typical LM3420A-8.4 LM3420-8.4 Units

A

V

V

SAT

I

L

R

f

E

n

Voltage Gain 1V ≤ V
∆V

OUT

/∆V

REG

RL= 470Ω (Note 6) 550/250 450/200 V/V(min)
1V ≤ V
R

L

Output Saturation V(IN) = V
(Note 7) I

OUT

Output Leakage V(IN) = V
Current V

OUT

Internal Feedback 181 kΩ
Resistor (Note 8) 227 227 kΩ(max)

Output Noise I

OUT

Voltage

(Continued)

REG,VOUT

= 1.5V.

(Note 4) Limit Limit (Limits)

(Note 5) (Note 5)

OUT

OUT

≤ V

≤ V

− 1.2V (−1.3) 1000 V/V

REG

− 1.2V (−1.3) 3500 V/V

REG

=5kΩ 1500/900 1000/700 V/V(min)

+100 mV 1.0 V

REG

= 15 mA 1.2/1.3 1.2/1.3 V(max)

−100 mV 0.1 µA

REG

= 0V 0.5/1.0 0.5/1.0 µA(max)

135 135 kΩ(min)

= 1 mA, 10 Hz ≤ f ≤ 10 kHz 140 µV

RMS

LM3420-4.2/LM3420-8.2/LM3420-8.4/LM3420-12.6/LM3420-16.8

LM3420-12.6
Electrical Characteristics

Specifications with standard type face are for TJ= 25˚C, and those with boldface type apply over full Operating Temperature
Range. Unless otherwise specified, V(IN) = V

REG,VOUT

Symbol Parameter Conditions Typical LM3420A-12.6 LM3420-12.6 Units

V

REG

Regulation Voltage I

Regulation Voltage I

= 1 mA 12.6 V

OUT

=1mA

OUT

Tolerance

I

q

G

m

A

V

V

SAT

I

L

R

f

Quiescent Current I

Transconductance 20 µA ≤ I
∆I

/∆V

OUT

REG

Voltage Gain 1V ≤ V
∆V

/∆V

OUT

REG

Output Saturation V(IN) = V
(Note 7) I
Output Leakage V(IN) = V
Current V

= 1 mA 85 µA

OUT

≤ 1 mA 3.3 mA/mV

OUT

V

= 10V 1.3/0.75 1.0/0.5 mA/mV(min)

OUT

1mA≤I
V

OUT

≤ 15 mA 6.0 mA/mV

OUT

= 10V 3.0/1.5 2.5/1.4 mA/mV(min)

≤ V

OUT

REG

RL= 750Ω (Note 6) 550/250 450/200 V/V(min)
1V ≤ V
R

L

OUT

OUT

≤ V

OUT

REG

=10kΩ 1500/900 1000/700 V/V(min)

+100 mV 1.0 V

REG

= 15 mA 1.2/1.3 1.2/1.3 V(max)

−100 mV 0.1 µA

REG

= 0V 0.5/1.0 0.5/1.0 µA(max)
Internal Feedback 287 kΩ
Resistor (Note 8) 359 359 kΩ(max)

E

n

Output Noise

I

= 1 mA, 10 Hz ≤ f ≤ 10 kHz

OUT

Voltage

= 1.5V.

(Note 4) Limit Limit (Limits)

(Note 5) (Note 5)

12.663/12.726 12.726/12.852 V(max)

12.537/12.474 12.474/12.348 V(min)

±

0.5/±1

±1/±

2 %(max)

110/115 125/150 µA(max)

− 1.2V (−1.3) 1000 V/V

− 1.2V (−1.3) 3500 V/V

215 215 kΩ(min)

210 µV

RMS

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LM3420-16.8
Electrical Characteristics

Specifications with standard type face are for TJ= 25˚C, and those with boldface type apply over full Operating Temperature
Range. Unless otherwise specified, V(IN) = V

REG,VOUT

Symbol Parameter Conditions Typical LM3420A-16.8 LM3420-16.8 Units

V

REG

Regulation Voltage I

Regulation Voltage I

= 1 mA 16.8 V

OUT

=1mA

OUT

Tolerance

I

q

G

m

A

V

LM3420-4.2/LM3420-8.2/LM3420-8.4/LM3420-12.6/LM3420-16.8

V

SAT

I

L

R

f

Quiescent Current I

Transconductance 20 µA ≤ I
∆I

/∆V

OUT

REG

Voltage Gain 1V ≤ V
∆V

/∆V

OUT

REG

Output Saturation V(IN) = V
(Note 7) I
Output Leakage V(IN) = V
Current V

= 1 mA 85 µA

OUT

≤ 1 mA 3.3 mA/mV

OUT

V

= 15V 0.8/0.4 0.7/0.35 mA/mV(min)

OUT

1mA≤I
V

OUT

≤ 15 mA 6.0 mA/mV

OUT

= 15V 2.9/0.9 2.5/0.75 mA/mV(min)

≤ V

OUT

REG

RL=1kΩ(Note 6) 550/250 450/200 V/V(min)
1V ≤ V
R

L

OUT

OUT

≤ V

OUT

REG

=15kΩ 1200/750 1000/650 V/V(min)

+100 mV 1.0 V

REG

= 15 mA 1.2/1.3 1.2/1.3 V(max)

−100 mV 0.1 µA

REG

= 0V 0.5/1.0 0.5/1.0 µA(max)
Internal Feedback 392 kΩ
Resistor (Note 8) 490 490 kΩ(max)

E

n

Output Noise

I

= 1 mA, 10 Hz ≤ f ≤ 10 kHz

OUT

Voltage

Note 1: Absolute Maximum Ratings indicate limits beyond which damage to the device may occur. Operating Ratings indicate conditions for which the device is in­tended to be functional, but do not guarantee specific performance limits. For guaranteed specifications and test conditions, see the Electrical Characteristics. The
guaranteed specifications apply only for the test conditions listed. Some performance characteristics may degrade when the device is not operated under the listed
test conditions.

Note 2: The maximum power dissipation must be derated at elevated temperatures and is dictated by T
bient thermal resistance), and T
given in the Absolute Maximum Ratings, whichever is lower. The typical thermal resistance (θ
for the M5 package.

Note 3: The human body model is a 100 pF capacitor discharged through a 1.5 kΩ resistor into each pin.
Note 4: Typical numbers are at 25˚C and represent the most likely parametric norm.
Note 5: Limits are 100% production tested at 25˚C. Limits over the operating temperature range are guaranteed through correlation using Statistical Quality Control

(SQC) methods. The limits are used to calculate National’s Averaging Outgoing Quality Level (AOQL).

Note 6: Actual test is done using equivalent current sink instead of a resistor load.
Note 7: V
Note 8: See Applications and Typical Performance Characteristics sections for information on this resistor.

= V(IN) − V

SAT

(ambient temperature). The maximum allowable power dissipation at any temperature is P

A

, when the voltage at the IN pin is forced 100 mV above the nominal regulating voltage (V

OUT

= 1.5V.

(Note 4) Limit Limit (Limits)

(Note 5) (Note 5)

16.884/16.968 16.968/17.136 V(max)

16.716/16.632 16.632/16.464 V(min)

±

0.5/±1

±1/±

2 %(max)

110/115 125/150 µA(max)

− 1.2V (−1.3) 1000 V/V

− 1.2V (−1.3) 3500 V/V

294 294 kΩ(min)

280 µV

(maximum junction temperature), θJA(junction to am-

Jmax

) when soldered to a printed circuit board is approximately 306˚C/W

JA

REG

Dmax

).

=(T

Jmax−TA

)/θJAor the number

RMS

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