TPS6220x High-Efficiency, SOT23 Step-Down, DC-DC Converter
- SLVS417F March 2002 – June 2015
  
  PRODUCTION DATA.

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DATA SHEET

TPS6220x High-Efficiency, SOT23 Step-Down, DC-DC Converter

1 Features

High-Efficiency Synchronous Step-Down
Converter With up to 95% Efficiency
2.5-V to 6-V Input Voltage Range
Adjustable Output Voltage Range From 0.7 V to V_I
Fixed Output Voltage Options Available
Up to 300-mA Output Current
1-MHz Fixed-Frequency PWM Operation
Highest Efficiency Over Wide Load Current Range Due to Power Save Mode
15-µA Typical Quiescent Current
Soft Start
100% Duty Cycle Low-Dropout Operation
Dynamic Output-Voltage Positioning
Available in a 5-Pin SOT23 Package

2 Applications

PDAs and Pocket PCs
Cellular Phones and Smart Phones
Low Power DSP Supplies
Digital Cameras
Portable Media Players
Portable Equipment

3 Description

The TPS6220x devices are a family of high-efficiency synchronous step-down converters ideally suited for portable systems powered by 1-cell Li-Ion or 3-cell NiMH/NiCd batteries. The devices are also suitable to operate from a standard 3.3-V or 5-V voltage rail.

With an output voltage range of 6 V down to 0.7 V and up to 300 mA output current, the devices are ideal to power low voltage DSPs and processors used in PDAs, pocket PCs, and smart phones. Under nominal load current, the devices operate with a fixed switching frequency of typically 1 MHz. At light load currents, the part enters the power save mode operation; the switching frequency is reduced and the quiescent current is typically only 15 µA; therefore, it achieves the highest efficiency over the entire load current range. The TPS6220x needs only three small external components. Together with the SOT23 package, a minimum system solution size is achieved. An advanced fast response voltage mode control scheme achieves superior line and load regulation with small ceramic input and output capacitors.

Device Information^⁽¹⁾

PART NUMBER	PACKAGE	BODY SIZE (NOM)
TPS6220x	SOT-23 (5)	2.90 mm × 1.60 mm

For all available packages, see the orderable addendum at the end of the data sheet.

Typical Application Schematic

TPS62200 TPS62201 TPS62202 TPS62203 TPS62204 TPS62205 TPS62207 TPS62208 ta_output_lvs417.gif

(Fixed Output Voltage Version)

Efficiency vs Load Current

TPS62200 TPS62201 TPS62202 TPS62203 TPS62204 TPS62205 TPS62207 TPS62208 eff_v_il_lvs417.gif

4 Revision History

Changes from E Revision (May 2006) to F Revision

Added ESD Ratings table, Feature Description section, Device Functional Modes, Application and Implementation section, Power Supply Recommendations section, Layout section, Device and Documentation Support section, and Mechanical, Packaging, and Orderable Information sectionGo
Changed the format of this data sheet to the new SDA format. No markup for changes. Go

5 Pin Configuration and Functions

DBV Package

5-Pin SOT-23

Top View

TPS62200 TPS62201 TPS62202 TPS62203 TPS62204 TPS62205 TPS62207 TPS62208 po_dbv_lvs417.gif

Pin Functions

PIN		I/O	DESCRIPTION
NAME	NO.	I/O	DESCRIPTION
EN	3	I	This is the enable pin of the device. Pulling this pin to ground forces the device into shutdown mode. Pulling this pin to Vin enables the device. This pin must not be left floating and must be terminated.
FB	4	I	This is the feedback pin of the device. Connect this pin directly to the output if the fixed output voltage version is used. For the adjustable version an external resistor divider is connected to this pin. The internal voltage divider is disabled for the adjustable version.
GND	2	—	Ground
SW	5	I/O	Connect the inductor to this pin. This pin is the switch pin and is connected to the internal MOSFET switches.
V_I	1	I	Supply voltage pin

6 Specifications

6.1 Absolute Maximum Ratings

over operating free-air temperature range (unless otherwise noted) ⁽¹⁾

		MIN	MAX	UNIT
V_I	Supply voltages⁽²⁾	–0.3	7.0	V
	Voltages on pins SW, EN, FB ⁽²⁾	–0.3	V_CC +0.3	V
P_D	Continuous power dissipation	See Thermal Information
T_J	Operating junction temperature	–40	150	°C
T_stg	Storage temperature	–65	150	°C

(1) Stresses beyond those listed under Absolute Maximum Ratings may cause permanent damage to the device. These are stress ratings only, which do not imply functional operation of the device at these or any other conditions beyond those indicated under Recommended Operating Conditions. Exposure to absolute-maximum-rated conditions for extended periods may affect device reliability.

(2) All voltage values are with respect to network ground terminal.

6.2 ESD Ratings

			VALUE	UNIT
V_(ESD)	Electrostatic discharge	Human body model (HBM), per ANSI/ESDA/JEDEC JS-001⁽¹⁾	±2000	V
V_(ESD)	Electrostatic discharge	Charged device model (CDM), per JEDEC specification JESD22-C101⁽²⁾	±500	V

(1) JEDEC document JEP155 states that 500-V HBM allows safe manufacturing with a standard ESD control process.

(2) JEDEC document JEP157 states that 250-V CDM allows safe manufacturing with a standard ESD control process.

6.3 Recommended Operating Conditions

over operating free-air temperature range (unless otherwise noted)

		MIN	NOM	MAX	UNIT
V_I	Supply voltage	2.5		6.0	V
V_O	Output voltage for adjustable output voltage version	0.7		V_I	V
I_O	Output current			300	mA
L	Inductor⁽¹⁾	4.7	10		µH
C_I	Input capacitor⁽¹⁾		4.7		µF
C_O	Output capacitor⁽¹⁾		10		µF
T_A	Operating ambient temperature	40		85	°C
T_J	Operating junction temperature	40		125	°C

(1) See Application and Implementation for further information.

6.4 Thermal Information

THERMAL METRIC⁽¹⁾		TPS6220x	UNIT
		DBV [SOT-23]
		5 PINS
R_θJA	Junction-to-ambient thermal resistance	220	°C/W
R_θJC(top)	Junction-to-case (top) thermal resistance	125	°C/W
R_θJB	Junction-to-board thermal resistance	36	°C/W
ψ_JT	Junction-to-top characterization parameter	14	°C/W
ψ_JB	Junction-to-board characterization parameter	35	°C/W
R_θJC(bot)	Junction-to-case (bottom) thermal resistance	N/A	°C/W

(1) For more information about traditional and new thermal metrics, see the Semiconductor and IC Package Thermal Metrics application report, SPRA953.

6.5 Electrical Characteristics

V_I= 3.6 V, V_O = 1.8 V, I_O = 200 mA, EN = VIN, T_A = –40°C to 85°C, typical values are at T_A= 25°C (unless otherwise noted)

PARAMETER			TEST CONDITIONS	MIN	TYP	MAX	UNIT
SUPPLY CURRENT
V_I	Input voltage			2.5		6	V
I_Q	Operating quiescent current		I_O = 0 mA, Device is not switching		15	30	µA
	Shutdown supply current		EN = GND		0.1	1	µA
	Undervoltage lockout threshold			1.5		2	V
ENABLE
V_(EN)	EN high level input voltage			1.3			V
V_(EN)	EN low level input voltage					0.4	V
I_(EN)	EN input bias current		EN = GND or VIN		0.01	0.1	µA
POWER SWITCH
r_ds(ON)	P-channel MOSFET on-resistance		V_IN = V_GS = 3.6 V		530	690	mΩ
	P-channel MOSFET on-resistance		V_IN = V_GS = 2.5 V		670	850	mΩ
	N-channel MOSFET on-resistance		V_IN = V_GS = 3.6 V		430	540	mΩ
	N-channel MOSFET on-resistance		V_IN = V_GS = 2.5 V		530	660	mΩ
I_{lkg_(P)}	P-channel leakage current		V_DS = 6.0 V		0.1	1	µA
I_{lkg_(N)}	N-channel leakage current		V_DS = 6.0 V		0.1	1	µA
I_(LIM)	P-channel current limit		2.5 V < Vin < 6.0 V	380	480	670	mA
OSCILLATOR
f_S	Switching frequency			650	1000	1500	kHz
OUTPUT
V_O	Adjustable output voltage	TPS62200		0.7		V_IN	V
V_ref	Reference voltage				0.5		V
	Feedback voltage ⁽¹⁾	TPS62200	V_I = 3.6 V to 6 V, I_O = 0 mA	0%		3%
	Feedback voltage ⁽¹⁾	Adjustable	V_I = 3.6 V to 6 V, 0 mA ≤ I_O ≤ 300 mA	–3%		3%
V_O	Fixed output voltage⁽¹⁾	TPS62207	V_I = 2.5 V to 6 V, I_O = 0 mA	0%		3%
		1.2 V	V_I = 2.5 V to 6 V, 0 mA ≤ I_O ≤ 300 mA	–3%		3%
		TPS62201	V_I = 2.5 V to 6 V, I_O = 0 mA	0%		3%
		1.5 V	V_I = 2.5 V to 6 V, 0 mA ≤ I_O ≤ 300 mA	–3%		3%
		TPS62204	V_I = 2.5 V to 6 V, I_O= 0 mA	0%		3%
		1.6 V	V_I = 2.5 V to 6 V, 0 mA ≤ I_O ≤ 300 mA	–3%		3%
		TPS62202	V_I = 2.5 V to 6 V, I_O= 0 mA	0%		3%
		1.8 V	V_I = 2.5 V to 6 V, 0 mA ≤ I_O ≤ 300 mA	–3%		3%
		TPS62208	V_I = 2.5 V to 6 V, I_O= 0 mA	0%		3%
		1.875 V	V_I = 2.5 V to 6 V, 0 mA ≤ I_O ≤ 300 mA	–3%		3%
		TPS62205	V_I = 2.7 V to 6 V, I_O= 0 mA	0%		3%
		2.5 V	V_I = 2.7 V to 6 V, 0 mA ≤ I_O ≤ 300 mA	–3%		3%
		TPS62203	V_I = 3.6 V to 6 V, I_O= 0 mA	0%		3%
		3.3 V	V_I = 3.6 V to 6 V, 0 mA ≤ I_O ≤ 300 mA	–3%		3%
	Line regulation		V_I = 2.5 V to 6 V, I_O = 10 mA		0.26		%/V
	Load regulation		I_O = 100 mA to 300 mA		0.0014		%/mA
I_lkg	Leakage current into SW pin		Vin > Vout, 0 V ≤ Vsw ≤ Vin		0.1	1	µA
I_lkg(Rev)	Reverse leakage current into pin SW		Vin = open, EN = GND, V_SW= 6 V		0.1	1	µA

(1) For output voltages ≤ 1.2 V, a 22-µF output capacitor value is required to achieve a maximum output voltage accuracy of 3% while operating in power save mode (PFM mode).

6.6 Typical Characteristics

Table 1. Table of Graphs

			FIGURES
η	Efficiency	vs Load current	Figure 6, Figure 7, Figure 8
η	Efficiency	vs Input voltage	Figure 9
I_Q	No load quiescent current	vs Input voltage	Figure 1
f_s	Switching frequency	vs Temperature	Figure 10
V_o	Output voltage	vs Output current	Figure 11
r_ds(on)	r_ds(on) - P-channel switch,	vs Input voltage	Figure 2
r_ds(on)	r_ds(on) - N-channel rectifier switch	vs Input voltage	Figure 3
	Line transient response		Figure 12
	Load transient response		Figure 13
	Power save mode operation		Figure 14
	Start-up		Figure 15

TPS62200 TPS62201 TPS62202 TPS62203 TPS62204 TPS62205 TPS62207 TPS62208 tc_quiescent_lvs417.gif

Figure 1. No Load Quiescent Current vs Input Voltage

TPS62200 TPS62201 TPS62202 TPS62203 TPS62204 TPS62205 TPS62207 TPS62208 tc_nchannel_lvs417.gif

Figure 3. r_ds(on) N-Channel Switch vs Input Voltage

TPS62200 TPS62201 TPS62202 TPS62203 TPS62204 TPS62205 TPS62207 TPS62208 tc_pchannel_lvs417.gif

Figure 2. r_ds(on) P-Channel Switch vs Input Voltage